Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review

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The development of resistant strains in Fungi and the incidence of azole antibiotic resistance in the Asia Pacific which reached 83% become a critical problem nowadays. To control fungal infections, substances and extracts isolated from natural resources, especially in the form of plants as the main sources of drug molecules today, are needed. Especially from Piperaceae, which have long been used in India, China, and Korea to treat human ailments in traditional medicine. The purpose of this review is to describe the antifungal mechanism action from Piper crocatum and its phytochemical profiling against lanosterol 14a demethylase CYP51. The methods used to search databases from Google Scholar to find the appropriate databases using Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) Flow Diagram as a clinical information retrieval method. From 1.150.000 results searched by database, there is 73 final results article to review. The review shows that P. crocatum contains flavonoids, tannins, terpenes, saponins, polyphenols, eugenol, alkaloids, quinones, chavibetol acetate, glycosides, triterpenoids or steroids, hydroxychavikol, phenolics, glucosides, isoprenoids, and non-protein amino acids. Its antifungal mechanisms in fungal cells occur due to ergosterol, especially lanosterol 14a demethylase (CYP51) inhibition, which is one of the main target sites for antifungal activity because it functions to maintain the integrity and function of cell membranes in Candida. P. crocatum has an antifungal activity through its phytochemical profiling against fungal by inhibiting the lanosterol 14a demethylase, make damaging cell membranes, fungal growth inhibition, and fungal cell lysis." } { "@context": "http://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": "1", "item": { "@id": "https://f1000research.com/", "name": "Home" } }, { "@type": "ListItem", "position": "2", "item": { "@id": "https://f1000research.com/browse/articles", "name": "Browse" } }, { "@type": "ListItem", "position": "3", "item": { "@id": "https://f1000research.com/articles/11-1115/v3", "name": "Phytochemical profiling of Piper crocatum and its antifungal mechanism..." } } ] } Home Browse Phytochemical profiling of Piper crocatum and its antifungal mechanism... ALL Metrics - Views Downloads Get PDF Get XML Cite How to cite this article Siswina T, Miranti Rustama M, Sumiarsa D and Kurnia D. Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.12688/f1000research.125645.3 ) NOTE: If applicable, it is important to ensure the information in square brackets after the title is included in all citations of this article. Close Copy Citation Details Export Export Citation Sciwheel EndNote Ref. Manager Bibtex ProCite Sente EXPORT Select a format first Track Share ▬ ✚ Review Revised Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] Tessa Siswina https://orcid.org/0000-0001-7299-2422 1,2 , Mia Miranti Rustama 3 , Dadan Sumiarsa 2 , Dikdik Kurnia https://orcid.org/0000-0001-9789-9785 2 Tessa Siswina https://orcid.org/0000-0001-7299-2422 1,2 , Mia Miranti Rustama 3 , Dadan Sumiarsa 2 , Dikdik Kurnia https://orcid.org/0000-0001-9789-9785 2 PUBLISHED 02 May 2023 Author details Author details 1 Midwifery, Poltekkes Kemenkes Pontianak, Pontianak, Kalimantan Barat, 78124, Indonesia 2 Chemistry, Padjadjaran University, Sumedang, Jawa Barat, 45363, Indonesia 3 Biology, Padjadjaran University, Sumedang, Jawa Barat, 45363, Indonesia Tessa Siswina Roles: Formal Analysis, Investigation, Methodology, Project Administration, Resources, Software, Visualization, Writing – Original Draft Preparation Mia Miranti Rustama Roles: Conceptualization, Formal Analysis, Methodology, Resources, Supervision, Visualization, Writing – Review & Editing Dadan Sumiarsa Roles: Formal Analysis, Methodology, Software, Supervision, Validation, Visualization, Writing – Review & Editing Dikdik Kurnia Roles: Conceptualization, Data Curation, Funding Acquisition, Project Administration, Resources, Supervision, Validation, Writing – Review & Editing OPEN PEER REVIEW DETAILS REVIEWER STATUS This article is included in the Plant Science gateway. Abstract Mycoses or fungal infections are a general health problem that often occurs in healthy and immunocompromised people in the community. The development of resistant strains in Fungi and the incidence of azole antibiotic resistance in the Asia Pacific which reached 83% become a critical problem nowadays. To control fungal infections, substances and extracts isolated from natural resources, especially in the form of plants as the main sources of drug molecules today, are needed. Especially from Piperaceae , which have long been used in India, China, and Korea to treat human ailments in traditional medicine. The purpose of this review is to describe the antifungal mechanism action from Piper crocatum and its phytochemical profiling against lanosterol 14a demethylase CYP51. The methods used to search databases from Google Scholar to find the appropriate databases using Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) Flow Diagram as a clinical information retrieval method. From 1.150.000 results searched by database, there is 73 final results article to review. The review shows that P. crocatum contains flavonoids, tannins, terpenes, saponins, polyphenols, eugenol, alkaloids, quinones, chavibetol acetate, glycosides, triterpenoids or steroids, hydroxychavikol, phenolics, glucosides, isoprenoids, and non-protein amino acids. Its antifungal mechanisms in fungal cells occur due to ergosterol, especially lanosterol 14a demethylase (CYP51) inhibition, which is one of the main target sites for antifungal activity because it functions to maintain the integrity and function of cell membranes in Candida . P. crocatum has an antifungal activity through its phytochemical profiling against fungal by inhibiting the lanosterol 14a demethylase, make damaging cell membranes, fungal growth inhibition, and fungal cell lysis. READ ALL READ LESS Keywords Piper crocatum, antifungal, phytochemical profiling, lanosterol 14 alpha demethylase, CYP51 Corresponding Author(s) Dikdik Kurnia ( [email protected] ) Close Corresponding author: Dikdik Kurnia Competing interests: No competing interests were disclosed. Grant information: This research was funded by Article Review Grant – 2022, Academic Leadership Grant (ALG) and Penelitian Disertasi Doktoral (PDD) Grant Universitas Padjadjaran, Bandung, Indonesia with contract letter no 2203/UN6.3.1/PT.00/2022. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Copyright: © 2023 Siswina T et al . This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. How to cite: Siswina T, Miranti Rustama M, Sumiarsa D and Kurnia D. Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.12688/f1000research.125645.3 ) First published: 28 Sep 2022, 11 :1115 ( https://doi.org/10.12688/f1000research.125645.1 ) Latest published: 02 May 2023, 11 :1115 ( https://doi.org/10.12688/f1000research.125645.3 ) Revised Amendments from Version 2 The difference between versions 2 and 3 of this research is in the manuscript because the author had revised the English language and grammar. There are also revisions in the result and discussion, from Table 1. The author explained the common name of P. crocatum – Red betel leaf in the introduction so that these synonyms name can be used further without confusing the reader. The explanation of the solvent used to extract secondary metabolites from P. crocatum has also been explained in Table 1, using ether 40-60 0 C, chloroforms, ethanol, water, and methanol extract from the type and polarity of the solvent used. in the previous version, the author only explained the bioactive compound of P. crocatum from only one reference. For the latest version, 4 (four) new references have been added that support information about bioactive compounds in P. crocatum, becoming more complete. Several sentences have been improved which have missing verbs so that they are easier to understand. The title of Figure 3 revised also have been made as the reviewer suggested its grammar and added a new explanation regarding capital letters in Figure from A-F. The A-F explained about the differentiation of cell wall association in fungal adhesins in several fungi species, like C. albicans, C. cerevisiae, P. braziliensis, A. fumigatus, B. dermatitis, S. pombe, and C. neoformans. The narrative in Figure 3 also has been revised and broken down into 3 new sentences that are simpler than one long and unclear sentence before. The author also explained the antifungal activities by P. crocatum phytochemicals like phenols, polyphenols, tannins, saponins, and flavonoids to inhibit ergosterol by lanosterol 14 alpha demethylase inhibition. The conclusion has been revised in the grammar and added a new explanation about the relationship between ergosterol and lanosterol 14 alpha demethylase. The difference between versions 2 and 3 of this research is in the manuscript because the author had revised the English language and grammar. There are also revisions in the result and discussion, from Table 1. The author explained the common name of P. crocatum – Red betel leaf in the introduction so that these synonyms name can be used further without confusing the reader. The explanation of the solvent used to extract secondary metabolites from P. crocatum has also been explained in Table 1, using ether 40-60 0 C, chloroforms, ethanol, water, and methanol extract from the type and polarity of the solvent used. in the previous version, the author only explained the bioactive compound of P. crocatum from only one reference. For the latest version, 4 (four) new references have been added that support information about bioactive compounds in P. crocatum, becoming more complete. Several sentences have been improved which have missing verbs so that they are easier to understand. The title of Figure 3 revised also have been made as the reviewer suggested its grammar and added a new explanation regarding capital letters in Figure from A-F. The A-F explained about the differentiation of cell wall association in fungal adhesins in several fungi species, like C. albicans, C. cerevisiae, P. braziliensis, A. fumigatus, B. dermatitis, S. pombe, and C. neoformans. The narrative in Figure 3 also has been revised and broken down into 3 new sentences that are simpler than one long and unclear sentence before. The author also explained the antifungal activities by P. crocatum phytochemicals like phenols, polyphenols, tannins, saponins, and flavonoids to inhibit ergosterol by lanosterol 14 alpha demethylase inhibition. The conclusion has been revised in the grammar and added a new explanation about the relationship between ergosterol and lanosterol 14 alpha demethylase. See the authors' detailed response to the review by Anna Safitri See the authors' detailed response to the review by Zubaida Yousaf READ REVIEWER RESPONSES Introduction Mycoses or fungal infections are a general health problem that often occurs in healthy and immunocompromised people in the community ( Ramírez et al. 2013 ). Fungi are divided into four classes: yeasts, filamentous, dimorphic, and dermatophytes; generally, and ubiquitous in the environment, and become pathogenic when immune cells decrease ( Howard et al. 2020 ). Fungal cells have essentially dynamic structure walls for morphogenesis, pathogenesis, and cell viability and act as a dynamic organelle, and need one-fifth of the yeast genome for cell wall biosynthesis ( Gow et al. 2017 ). The development of resistant strains in fungi and the incidence of azole antibiotic resistance in the Asia Pacific which reached 83% become a critical problem nowadays ( Whaley and Rogers 2016 ; Whaley et al. 2017 ). The Azoles are commonly used because cheaper and have a broad spectrum of antimicrobials ( Rosam et al. 2021 ). To control fungal infections, substances, and extracts isolated from natural resources, especially in the form of plants as the main sources of drug molecules today, are needed ( Balouiri et al. 2016 ). Natural products have limited or no side effects on human and animal antifungal activity ( Tabassum and Vidyasagar 2013 ). Antifungal mechanisms in fungal cells occur due to ergosterol inhibition as a result of 5,6 desaturase (ERG3) downregulation which is the second final step of the ergosterol biosynthetic pathway ( Alizadeh et al. 2017 ). Ergosterol at the fungal plasma membrane is the most common sterol and binding at lanosterol 14α demethylase, an ergosterol-specific enzyme that can cause lanosterol demethylation ( Loeffler and Stevens 2003 ; Ashley et al. 2006 ; Emami et al. 2017 ). Piperaceae plant extracts have long been used in India, China, and Korea to treat human ailments in traditional medicine ( Jeon et al. 2019 ). The part of the Piperaceae family which has large species of up to 1000 is the Piper genus ( Durant-Archibold et al. 2018 ). Piper can be found in temperate regions with tropical and sub-tropical ( Lima et al. 2020 ). Indonesia is located on the equator, which has a tropical climate with high humidity and many natural and biological resources ( Puspita et al. 2018 ). The seeds and leaves of Piper species are often cultivated and consumed for various diseases treatment such as antifungal, antibacterial, and disinfectant effects ( Astuti et al. 2014 ; Mgbeahuruike et al. 2017 ). Isolation of several secondary metabolites of Piper species shows that therapeutically molecules like lignans, flavones, alkaloids, unsaturated amides, long and short-chain esters, aristolactams, monoterpenes, sesquiterpenes, ketones, aldehydes, arylpropanoids, chalcones, propenylphenols, and amide alkaloids as a typical constituent ( Gutierrez et al. 2013 ). However, no tests were found on specific compounds for antibacterial activity from Piper ( Barh et al. 2013 ). Based on the literature, antifungal compounds are classified into flavonoids, amides, acid derivatives, lignans, prenylated benzoic, cyclopentanedione, butenolides, and phenylpropanoids ( Xu and Li 2011 ). Of the various Piper species, the main constituent is an amide, which is classified as aristolactams, open-chain alkamides, amides with pyrrolidine, 4,5-dioxoaporphines, Piperidine, and Piperidone groups, ceramides, cyclohexanamid, and cyclobutanamide ( Do Nascimento et al. 2012 ). In this review, we summarize the antifungal activity properties, structural studies, and bio-mechanism of P. crocatum , commonly known as Red Betel leaf, which is found worldwide, against lanosterol 14 α demethylase CYP51 in fungi. This review is expected to allow us to find new alternative antifungal treatment agents from natural resources based on their active chemical compounds and activities to cure fungal infections, thus reducing the extensive and inappropriate use of antibiotics for antifungal treatment. Methods The author searches databases from Google Scholar to find the appropriate databases using the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) Flow Diagram as a clinical information retrieval method. The search screening occurred through four stages. The first stage was screening by the keywords, the second stage was screening by the criteria, the third stage was screening by relevance and duplicates, and the fourth stage was screening by eligibility. The keyword of this search was ‘ Piper’ which yielded 1,150,000 results. The second step was screening by inclusion criteria of the keyword ‘ Piper’ that reported articles published from 2003 until 2022, which yielded 326,000 results. For the third step, screening by relevance and duplicate with the keyword of this search is ‘ Piper crocatum’ AND ‘antifungal’, which yielded about 498 results. The final screening results included 73 articles to review. This search was conducted from February to May 2022. The criteria for this research were clinical trials in animal testing and humans, books, laboratory tests, case studies, article reviews, systematic reviews, narrative reviews, and meta-analyses. The study was conducted with a true-experimental (Double-Blind RCT), quasi-experimental, study protocol, or pilot study. Articles were published in English. The flow chart of the Literature Review showed in Figure 1 . Figure 1. The flowchart of literature reviews of P. crocatum. Results and discussion Ethno-botany and ethnopharmacology of P. crocatum P. crocatum , used as spices, vegetables, and components in some ethnic’s ceremonial, and medicinal herbs by the local community in Southeast Asian Countries especially Indonesia to treat candidiasis, hypertension, hepatitis, diabetes mellitus, kidney failure, cholesterol, prevent stroke, breast cancer, hemorrhoids, inflammation, coughing up blood, nose bleed, vaginal discharge, and tuberculosis disease ( Astuti et al. 2014 ; Lely et al. 2021 ). P. crocatum , a plant native from Peru then spread to several regions in the world, and grows in temperate climates (tropical and subtropical) ( Lima et al. 2020 ). Red betel is a shrub that consists of trunked, 5-10 cm continuous branches, with each segment having roots growing ( Safithri and Fahma 2008 ). The stems of red betel are round, purplish-green heart-shaped leaves, have no flowers, green with grayish-white tapered ends, special aroma, and are very bitter ( Hermiati et al. 2013 ). The taxonomy of P. crocatum is as follows ( Suri et al. 2021 ): Kingdom: Plantae Subkingdom: Tracheobionta Division: Magnoliophyta Class: Magnoliopsida Order: Piperales Family: Piperaceae Genus: Pipers Species: Piper crocatum Ruiz&Pav According to ethnopharmacology data, P. crocatum leaves have anxiolytic, analgesic, anti-inflammatory, vasodilatory, immunomodulatory, antimicrobial, antifungal, antitumor, antibacterial, anti-cariogenic, antifungal, anti larva, anti protozoa, anti filaria, antiallergic, antidiabetic, antihelmintic, stress relieves, antihyperglycemic, antibiotics, platelet inhibitors, and antioxidants ( Bezerra et al. 2008 ; Rodrigues et al. 2009 ; Fadlilah 2015 ; Fatmawaty et al. 2019 ; Madhumita et al. 2020 ). The phytochemical of P. crocatum Isolated P. crocatum from 112 species contains 677 different compounds, consisting of 190 alkaloids or amides, 97 terpenes, 70 neolignans, 49 lignans, 39 phenylpropanoids, 18 kavapyrones, 17 chalcones or dihydrochalcones, 16 flavones, 15 steroids, 6 flavanones, 4 cinnamylidone butenolides or piperolides, and 146 other compounds ( Saputra et al. 2016 ). Isolation of several secondary metabolites of P. crocatum contains flavonoids, tannins, terpenes, saponins, polyphenols, eugenol ( 1 ), alkaloids, quinones ( 2 ), chavibetol acetate, glycosides ( 3 ), triterpenoids ( 4 ) or steroids, hydroxychavikol ( 5 ), phenolics, glucosides ( 6 ), isoprenoids, and non-protein amino acids ( Erviana 2011 ; Gutierrez et al. 2013 ; Saputra et al. 2016 ; Li et al. 2019 ; Lister et al. 2020 ; Safithri et al. 2020 ). The bioactive compounds of P. crocatum are as follows in Table 1 and Figure 2 . Table 1. The bioactive compounds of P. crocatum . Extract type Chemical compounds Used ether 40-60°C, chloroforms, ethanol, and water solvent ( Suri et al. 2021 ) Used ethanol solvent ( Fatmawaty, Anggreni, Fadhil, & Prasasty 2019 ) Used methanol Solvent ( Januarti, Wijayanti, Wahyuningsih, & Nisa 2019 ) Used methanol solvent ( Safithri & Fahma 2008 ) Used methanol extract ( Li, Yang, Kim, & Li 2019 ) Red Betel leaf extract Alkaloid Alkaloid Saponin Alkaloid Pipercroside A Carbohydrate Glycosides Tannin Flavonoid Pipercroside B Water Saponin Phenol Tannin 2,5-Dimethoxy-3-glucopyranosylcinnamic alcohol Tannin Tannin Flavonoid Cimidahurinin Phenol Triterpenoid/Steroid Erigeside II Flavonoid Flavonoid Syringin Essential oil Essential oil β-Phenylethyl β- D -glucoside Methyl salicylate 2- O -β- D -Glucopyranoside Icariside D1 4-Hydroxybenzoic acid β- D -glucosyl ester Benzyl β- D -Glucoside Phenylmethyl 6- O -α- L -Arabinofuranosyl-β- D -glucopyranoside Red Betel leaf essential oil (water distillation, sodium sulfate dryer) Carvacrol (7) Eugenol ( 1 ) 28.44% Chavicol ( 8 ) Allylcatechol ( 9 ) Cinema Estragole ( 10 ) Caryophyllene ( 11 ) Pcymenedaneugenol Metil eter-19 Safrole ( 12 ) 27.48% Selinene ( 13 ) 7.32% Methyl eugenol ( 14 ) 1.46% Germacrene D ( 15 ) 0.91% Eugenyl Acetate ( 16 ) 1.72% Isosafrole ( 17 ) 1.62% Figure 2. Chemical structures of P. crocatum ( Saputra et al. 2016 ; Fatmawaty et al. 2019 ; Lister et al. 2020 ). The heated leaves are often used to relieve asthma, sore throats, coughs, and vaginal discharge, while the essential oil is used as catarrh and diphtheria inhalation and mouthwash, with antifungal activity ability against Candida sphaerospermum and Candida cladospoiroides with strong MIC of 10 μg/ml ( Safithri et al. 2020 ; Suri et al. 2021 ). The antimicrobial compounds include phenolics and flavonoids in P. crocatum by its hydroxyl group at 5 positions causing inner and outer bacterial cell membrane fluidity reduction ( Puspita et al. 2018 ). Alkaloid in P. crocatum by its aromatic substitution, carbon rings, and oxidation nature caused inhibition of bacterial growth and cell lysis. Tannins also have antibacterial activity by slowing the fungal cell's growth, and shrinking cell membranes thereby limiting the development of cell membrane synthesis, distorting permeability, breakdown, and cell lysis while saponins can dilute lipids (lipophilic) and then reducing cell surface pressure with their ability to attract water (hydrophilic) and caused cell damage. Terpenoids in P. crocatum cause permeability decreased and rupture of cell membranes so the nutrients and enzymes leave the cytoplasm, decrease metabolism, reduce ATP production, and inhibit bacterial growth and reproduction ( Cowan 1999 ; Rinanda et al. 2012 ). Test methods and antifungal properties of P. crocatum P. crocatum has been tested on C. albicans with agar diffusion method ( Kusuma et al. 2017 ), MIC determination with microdilution method, and MBC determination by the medium surface of Mueller Hinton Agar, and shows that extract of ethanol indicates antifungal activity, MIC value 1.25-2.5% w/v, and MBC value 0.75 min ( Kusuma et al. 2017 ). The study shows about ten (10) known compounds (2,5-dimethoxy-3-glucopyranosylcinnamic alcohol, cimidahurinin, erigeside II, syringin, β-phenylethyl β-D-glucoside, methyl salicylate 2- O -β-D-glucopuranoside, icariside D1, 4-hydroxybenzoic acid β-D-glucosyl ester, benzyl β-D-glucoside, and phenylmethyl 6- O -α-L-arabinofuranosyl-β-D-glucopyranoside), and two new phenolic glucosides (Pipercroside A and B) that isolated from MeOH extract of P. crocatum elucidated by spectroscopy 1D and 2D NMR, HR-ESI-MS analysis also reports erigeside II have the best antifungal activity with IC 50 value as 58.5 ( Li et al. 2019 ). Polyphenol inactivates protein and inhibits enzymes on the surface of bacterial cells; flavonoids form complexes that interfere with the function of the bacterial cell wall, inactivating microbial adhesion, enzymes, and cell protein transport by binding to bacterial extracellular proteins through hydrogen and covalent bonds; saponins have hydrophilic molecules and lipid thinning molecules (lipophilic) so that they can make lower cell surface pressure; tannins functions to form complex compounds with enzymes and substrates, thereby disrupting cell membranes, and phenol has hydroxyl and carbonyl groups that can interact with fungal cells through hydrogen bonds, thereby increasing protein coagulation and fungal cell membranes which will cause fungal cells to lyse ( Januarti et al. 2019 ). Inhibition of fungal activity can be done by bothering cell membranes, the activity of enzymes, and fungi genetic mechanisms ( Ejele et al. 2012 ). Antifungal properties and structure Treatment of vaginal discharge due to Candida gave the best response to a combination of the intravaginal vulva and topical therapy ( Mitchell 2004 ). Antifungals for the treatment of vaginal discharge caused by C. albicans are fluorinated pyrimidine cytosine (5-FC) which targets RNA synthesis and DNA replication, polyenes which affect the integrity of cell membranes, azoles which affect the target of the ergosterol biosynthetic pathway, and echinocandins which affect cell wall biosynthesis, while the use of broad-spectrum antibiotics increases cases of immunocompromise ( Yücesoy and Marol 2003 ; Sendid et al. 2007 ). Antifungals that damage cell membrane permeability work by binding to ergosterol in the polyene group, inhibiting the synthesis of ergosterol in squalene monooxygenase or epoxidase in the allylamines group, and inhibiting the synthesis of ergosterol in 14-α-demethylase or fungal cytochrome P450 in the azoles group; antifungal destroying cell walls works by inhibiting the synthesis of 1,3-β-glucan by binding to the glucan synthase enzyme which functions to form glucan in the echinocandin group; and antifungal inhibitors of DNA synthesis from fungal cells by inhibiting the synthesis of thymidylate or pyrimidine analogs in flucytosine (5-Fluorocytosine) and mitotic inhibitors in griseofulvin ( Cannon et al. 2007 ; Lewis 2011 ). Fungal cell walls, fungal-specific, serve as protection from harmful environments and are aggressive because of its toxic and hydrolytic molecules. Ninety percent consist of polysaccharides, with Saccharomyces and Candida subphylum as the well-characterized fungal adhesins ( Figure 3 ) ( Latgé 2007 ). The core of the central fungal cell wall consists of chitin that is linked to branched β-1,3-glucan, combined with galactomannan, galactosamynoglycan, and β-1,3-1,4-glucan in A. fumigatus and β-1,6-glucan in C. albicans ( Adams 2004 ; Latgé 2010 ). Chitin, with a weight of 1-2% from dry cell wall yeast, is an important structure that consists of a homopolymer of β-1,4-linked N -acetylglucosamine that is long and linear, while disrupted chitin synthesis will cause the fungal cell wall to be lysis and unstable in osmotic ( Bowman and Free 2006 ). Figure 3. An illustration of cell wall association in fungal adhesins (the blue line indicates the cell wall which is composed of glucan polymers; Ca, C. albicans ; Sc, S. cerevisiae ; Pb, P. braziliensis ; Af, A. fumigatus ; Bd, B. dermatitidis ; Sp, S. pombe ; Cn, C. neoformans; A, adhesins; B-E, modes of cell wall attachment; A1 and A3, have discrete ligand binding domains; A2 doesn’t have discrete ligand binding domains, Cys-rich sequences in ScFig2; C, Cys-rich sequences in AfRodB; D, Cys/Trp rich domains in Bd/Bad-1; F, attached by modified GPI anchors to the cell wall ) ( Lipke 2018 ). Ergosterol is a bitopian endoplasmic reticulum protein, which spans the entire length of the lipid bilayer ( Figure 4 ) ( Emami et al. 2017 ; Rosam et al. 2021 ). Ergosterol is a key enzyme in fungal-specific sterols, cytochrome P450 enzyme in fungi derived from S. cerevisiae , belonging to the CYP51 (lanosterol 14-α-demethylase) family. The biosynthesis inhibition of ergosterol will be caused by intermediates toxic sterol accumulation (14-α-methyl-3,6-diol) by ERG3. By binding the nitrogen atom containing heterocyclic moiety in the core ring to the iron atom of the heme domain group in the active site and preventing the formation of lanosterol demethylation, the cell membranes will get damaged, and lysis ( Arthington-Skaggs et al. 1999 ; Flowers et al. 2015 ). Ergosterol biosynthesis is one of the main target sites for antifungal activity because ergosterol functions to maintain the integrity and function of cell membranes in Candida so it can cause fungistatic effects if there is inhibition of lanosterol 14α demethylase ( Shareef et al. 2019 ; Kumar et al. 2020 ). Figure 4. The cell wall and membrane of Candida ( Emami et al. 2017 ; Rosam et al. 2021 ). The accumulation of toxic sterol and depletion of ergosterol causes inhibition of cell growth and division, then increases pressure on the cell wall so that the cell becomes damaged ( Robbins et al. 2016 ). Fungal cell walls that have been damaged can cause fungal growth inhibition, morphological changes, and fungal cell lysis ( Buitimea-Cantúa et al. 2013 ). ERG11, the major target in the fungal membrane that is absent in the host cell membrane catalyzes C14-demethylation of lanosterol to 4,4′-dimethyl cholesta-8,14,24-triene-3-β-ol, sterol 14-reductase then reductases to episterol, which in turn is converted to ergosta-5,7,24(28)-trienol by sterol 5,6 desaturase (ERG3), and with sterol 8-isomerase converted it into ergosterol ( Figure 5 ). The fungistatic mechanism by inhibiting lanosterol 14α demethylase (encoded by ERG11), which leads to a block in ergosterol synthesis and the accumulation of toxic sterol intermediates, including 14-α-methyl-3,6-diol produced by Erg3 ( Lee et al. 2021 ). This toxic sterol gave the membrane cell heavy stress and impairs cell membrane permeability, thereby ergosterol biosynthesis becomes inhibited and cell membranes get damaged, leading to fungal lysis ( Figure 6 ) ( Sanglard et al. 2003 ; Pemán et al. 2009 ; Emami et al. 2017 ; Rosam et al. 2021 ). Figure 5. The diagram of ergosterol formation in fungal cells ( Emami et al. 2017 ). Figure 6. The fungal lysis process ( Lee et al. 2021 ). Phenol Phenol (carbolic acid) are secondary metabolites that can be found widely in Piper species, but rarely found in algae, fungi, and bacteria; organic compounds with low molecular weight, have one or more substituents hydroxyl group in aromatic phenyl ring, especially benzene, formed from phenylpropanoid or shikimate that produce phenylpropanoids and acetate or malonate polyketide pathway that produce simple phenols or with phenylpropanoids, identified by UV-Vis Spectra and retention times compared with the literature and reference compounds that available ( Waniska 2000 ; Lattanzio 2013 ; Ferreira et al. 2016 ). Phenolic compounds have hydroxyl and carbonyl groups that can interact with fungal cells through hydrogen bonds, thereby increasing protein and cell membranes of pathogen fungal coagulation which will cause the damage and lysis of the fungal cells, and make the next fungal ergosterol growth anomaly and malformation ( Wagner and Donaldson 2014 ; Mohamed et al. 2017 ; Silva et al. 2018 ). Phenolic also had antifungal activities by targeting to destroy the fungal pathogenic effects by inhibiting the fungal dimorphic transition, because dimorphic nature is very important for fungal survival in the host, with making different morphology in different conditions or temperatures, both as hyphae (pathogenic) or yeast cells (non-pathogenic) ( Ansari et al. 2013 ). Polyphenol Polyphenols, known as an antifungal that has been isolated in Piper species, are water-soluble, have at least two phenolic rings, usually have 12-16 groups of phenolic hydroxyl at aromatic rings, and have a molecular weight from 500 to 3,000 (Da) ( Boulenouar et al. 2011 ; Cheynier 2012 ). Polyphenols inactivate protein and inhibit enzymes on the surface of bacterial cells; flavonoids form complexes that interfere with the function of the bacterial cell wall, inactivating microbial adhesion, enzymes, and cell protein transport by binding to bacterial extracellular proteins through hydrogen and covalent bonds ( Januarti et al. 2019 ). Tannin Tannins ([2,3-dihydroxy-5-[[(2 R ,3 R ,4 S ,5 R ,6 S )-3,4,5,6-tetrakis[[3,4-dihydroxy-5-(3,4,5-trihydroxybenzoyl)oxybenzoyl]oxy]oxan-2-yl]methoxycarbonyl]phenyl] 3,4,5-trihydroxybenzoate) are important compounds that have been isolated in the Piper species and have been classified as natural polyphenol groups, water-soluble, a molecular weight of 500-3000 daltons, condensed and hydrolyzed to polymerization that reaches high degrees and have two or three phenolic hydroxyl and carboxyl functional groups on a phenyl ring, known as antimicrobial, against various types of microorganisms, including bacteria, yeasts, fungi, and virus ( Chung et al. 1998 ; de Jesus et al. 2012 ; Kardel et al. 2013 ; Delimont et al. 2017 ; Ge et al. 2020 ). Tannins inhibit the chitin growth in the fungi cell wall, which will cause fungal growth inhibition and cell metabolism disruption ( Ridzuan et al. 2021 ) . With a high affinity to polysaccharides and proteins, tannins function to form complex compounds with enzymes and substrates, thereby disrupting cell membranes ( Hoste et al. 2006 ). Plasma membrane and cell wall disruption that being tannin targeted will cause intracellular contents leakage ( Zhu et al. 2019 ). Tannins have the best antifungal activity in C. albicans at a concentration above 7.80 mg/L, similar to nystatin, slightly lower than fluconazole, by shoots increasing, substrate and metal ion reduction, germ tube formation inhibition, and wall ultrastructure changing ( Ishida et al. 2006 ). Saponins Saponins (beta-Escin), sapo in Latin, are one of the important secondary metabolites in plant, insects, and marine organisms. They are amphiphilic, have surfactant, soap-like foams, and are heat-stable ( Melzig et al. 2001 ; Haralampidis et al. 2002 ; Shi et al. 2004 ), used as herbs and known as antifungal and antibacterial ( Francis et al. 2002 ; Zhang et al. 2006 ). Divided into triterpenoid and steroidal saponins based on their aglycones structure and biochemistry (in plants, the core structures-27 carbon atoms-as furostan (16β, 22-epoxy-cholestan) and spirostan (16α, 22:22α, 26-diepoxy-cholestan), they usually have a hydroxyl group at C-3 position for monodesmosidik, and at C-26 at saponin furastanol bidesmosidik or C-28 at triterpene bidemosidik, sometimes also reported at C-2, C-15, C-16, C-21, lyobipolar so can affect to lower aqueous surface tension and cell membranes. Saponins destroy the cell membrane by binding in the cell wall with sterol components so that the pores are formed ( Ridzuan et al. 2021 ). Saponins have hydrophilic molecules and lipid thinning molecules (lipophilic) so that they can make lower cell surface pressure ( Januarti et al. 2019 ). It is reported that 64 μg/ml saponin extract can inhibit C. albicans growth and development, by mycelium inhibition, inhibits yeast transition to filamentous, inhibits surface polystyrene adhesion and phospholipase production secretion, and endogenous reactive species oxygen (ROS) induce and the high activity showed by A. minutiflorum saponin (minutoside B) against fungal attack ( Barile et al. 2007 ; Jiang et al. 2015 ; Yang et al. 2018 ). Flavonoid Flavonoids (bioflavonoids), flavus in Latin, yellow powder, low molecular weight, are secondary metabolites that are very useful as antimicrobials by making bacterial damage, contain diphenylpropane (C 6 -C 3 -C 6 ), and have a three-carbon bridge with phenyl groups, as the core structure of 2-phenylbenzopyra, less toxic and low cost ( Baum et al. 2001 ; Galeotti et al. 2008 ; Can et al. 2015 ; Kurnia et al. 2018 ; Khalid et al. 2019 ; Herdiyati et al. 2020 ). As an important polyphenol class, flavonoids divided by C-ring oxidation degree, with the three-carbon segment oxidation degree and unsaturation degree, and the major classes are flavonols (3-hydroxy with the different site at OH group of phenolic), flavanones (C-4-keto-group with double-blind of C-2 and C-3), flavanols or flavan-3-ols (C 3 -hydroxyl group and carbon ring that fully saturated), isoflavones (act like phytoestrogens), aurones, chalcones (two aromatic rings by three-unit carbons to make the group of α,β unsaturated carbonyl), and anthocyanidins ( Pourcel et al. 2007 ; Corradini et al. 2011 ; Seleem et al. 2017 ). Flavonoids have activities such as antibacterial, antioxidant, anti-inflammation, and antifungal properties through its ability to form complexes with extracellular proteins and interfere with microbial membrane activity because of its lipophilic properties ( Candiracci et al. 2011 ). Research showed that flavonoids isolated, like 3,4-dihydroxy-5,6,7-trimethoxyflavone, cirsiliol, cirsimaritin, and hispidulin showed antifungal activity to C. sphaerospermum ( Alcerito et al. 2002 ). Research also showed that flavonoids in honey have an antifungal activity to C. albicans growth inhibition, but not kill the yeasts ( Candiracci et al. 2011 ), prenylated flavanones indicated that high antifungal activity to Trichophyton spp with 1.95 g/ml MIC value ( Jin 2019 ), and flavonoids inhibit the growth of fungal that increased every concentrations level against Aspergillus niger van Tieghem, Aspergillus fumigatus Fresenius, Altenaria alternata (Fr.) Keissler, Penicillium citrii , and Macrophomia phaseolina (Tassi) Goid ( Kanwal et al. 2010 ). This literature review summarizes the phytochemicals and antifungal mechanisms of P. crocatum that are commonly found worldwide, as also other important activities of this Piper. Fungal infections are a problem that often occurs and becomes an ongoing and serious threat to public health ( Kathiravan et al. 2012 ). Polyene amphotericin B is one of the antibiotics that still often used for the treatment of life-threatening fungal diseases, even though it is known to have toxic side effects ( Odds 2003 ). Fluconazole is also known to have resistance to Candida species due to pressure continuous exposure, drug interactions, and side effects like visual impairment ( Canuto and Rodero 2002 ; Chen and Sorrell 2007 ). The increasing use of antifungal treatment causes resistance to antibiotics that are used commonly, even in patients who have never used the drug ( Arif et al. 2009 ; Arendrup 2014 ). The development of strains that are starting to become resistant to antibiotics from fungal species nowadays is a critical problem that must be addressed immediately in therapeutic problems in society by providing new antifungal agents ( Johnson et al. 2004 ; Jianhua and Hai 2009 ; Moghadamtousi et al. 2014 ). Natural resources are very important to developing new active molecules and properties, with the utilization of natural ingredients as antifungal treatment having a greater level of safety if used appropriately and correctly in terms of dose, time, and method of use ( Vengurlekar et al. 2012 ). Plants have a lot of bioactive secondary metabolites such as flavonoids, terpenoids, alkaloids, tannins, saponins, and other compounds as antifungal agents ( Arif et al. 2009 ). Due to the high rate of antibiotic resistance in the treatment of antifungal because of long-term use, new antifungal treatment agents are needed. The new antifungal should be safer, have minimal side effects, be cheaper, easier to get, and more potent against fungal infections. Based on the results of the review, it was found that P. crocatum contains compounds that have antifungal activity. By its secondary metabolites, P. crocatum has the opportunity to become a new antifungal agent as an alternative non-pharmacological antifungal treatment. Conclusions Natural products are important resources in the discovery and development of new medicinal raw materials. P. crocatum has antifungal activities that are against fungal by its compounds and inhibit ergosterol as a key enzyme in fungal-specific sterols. The inhibition of ergosterol can be induced by the inhibition of lanosterol 14 α demethylase in the biosynthesis which will cause integrity and function damage to fungal cell membranes. Damaged cell membranes will cause fungal growth inhibition, morphological changes, and fungal cell lysis. 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PubMed Abstract | Publisher Full Text Zhu C, Lei M, Andargie M, et al. : Antifungal Activity and Mechanism of Action of Tannic Acid against Penicillium digitatum. Physiol. Mol. Plant Pathol. 2019; 107 (January): 46–50. Publisher Full Text Comments on this article Comments (1) Version 3 VERSION 3 PUBLISHED 02 May 2023 Revised Comment ADD YOUR COMMENT Version 1 VERSION 1 PUBLISHED 28 Sep 2022 Discussion is closed on this version, please comment on the latest version above. Author Response 27 Mar 2023 Dikdik Kurnia , Chemistry, Padjadjaran University, Sumedang, 45363, Indonesia 27 Mar 2023 Author Response 1. Title Answer : Thank you for your correction and suggestion . The authors have changed the title according to antifungal mechanism action according to the results and discussion. ... Continue reading 1. Title Answer : Thank you for your correction and suggestion . The authors have changed the title according to antifungal mechanism action according to the results and discussion. 2. Abstract Answer : Thank you for the correction and suggestion . The authors have revised and re-added the explanation about this sentence in the abstract, introduction, and discussion. 3. Introduction Answer : Thank you for your correction and suggestion . The authors have changed the study idea statement in the abstract according to the introduction. 4. Results and Discussion Answer : Thank you for your correction and suggestion . The sentence in the heading “Ethno-botany and ethnopharmacology of P. crocatum” has added new data as the reviewer suggested. 5. Results and Discussion Answer : Thank you for your correction and suggestion . The authors have re-improvement the sentence structures in the heading “The phytochemical and chemical structures of P. crocatum”. 6. Results and Discussion Answer : Thank you for your correction and suggestion . The author has added the explanation as the reviewer suggested in bioactive compounds and antifungal activities. 7. Results and Discussion Answer : Thank you for your correction and suggestion . The authors have added more references according to the title statement in the abstract, introduction, results, and discussion and added 3 new Figures to explain. 8. Figure 3 Answer : Thank you for your correction and suggestion . The authors have respelled the caption mistake. 9. References Answer : Thank you for your correction and suggestion . The authors have followed the suggestions. 1. Title Answer : Thank you for your correction and suggestion . The authors have changed the title according to antifungal mechanism action according to the results and discussion. 2. Abstract Answer : Thank you for the correction and suggestion . The authors have revised and re-added the explanation about this sentence in the abstract, introduction, and discussion. 3. Introduction Answer : Thank you for your correction and suggestion . The authors have changed the study idea statement in the abstract according to the introduction. 4. Results and Discussion Answer : Thank you for your correction and suggestion . The sentence in the heading “Ethno-botany and ethnopharmacology of P. crocatum” has added new data as the reviewer suggested. 5. Results and Discussion Answer : Thank you for your correction and suggestion . The authors have re-improvement the sentence structures in the heading “The phytochemical and chemical structures of P. crocatum”. 6. Results and Discussion Answer : Thank you for your correction and suggestion . The author has added the explanation as the reviewer suggested in bioactive compounds and antifungal activities. 7. Results and Discussion Answer : Thank you for your correction and suggestion . The authors have added more references according to the title statement in the abstract, introduction, results, and discussion and added 3 new Figures to explain. 8. Figure 3 Answer : Thank you for your correction and suggestion . The authors have respelled the caption mistake. 9. References Answer : Thank you for your correction and suggestion . The authors have followed the suggestions. Competing Interests: No competing interests were disclosed. Close Report a concern Discussion is closed on this version, please comment on the latest version above. Author details Author details 1 Midwifery, Poltekkes Kemenkes Pontianak, Pontianak, Kalimantan Barat, 78124, Indonesia 2 Chemistry, Padjadjaran University, Sumedang, Jawa Barat, 45363, Indonesia 3 Biology, Padjadjaran University, Sumedang, Jawa Barat, 45363, Indonesia Tessa Siswina Roles: Formal Analysis, Investigation, Methodology, Project Administration, Resources, Software, Visualization, Writing – Original Draft Preparation Mia Miranti Rustama Roles: Conceptualization, Formal Analysis, Methodology, Resources, Supervision, Visualization, Writing – Review & Editing Dadan Sumiarsa Roles: Formal Analysis, Methodology, Software, Supervision, Validation, Visualization, Writing – Review & Editing Dikdik Kurnia Roles: Conceptualization, Data Curation, Funding Acquisition, Project Administration, Resources, Supervision, Validation, Writing – Review & Editing Competing interests No competing interests were disclosed. Grant information This research was funded by Article Review Grant – 2022, Academic Leadership Grant (ALG) and Penelitian Disertasi Doktoral (PDD) Grant Universitas Padjadjaran, Bandung, Indonesia with contract letter no 2203/UN6.3.1/PT.00/2022. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Article Versions (3) version 3 Revised Published: 02 May 2023, 11:1115 https://doi.org/10.12688/f1000research.125645.3 version 2 Revised Published: 27 Mar 2023, 11:1115 https://doi.org/10.12688/f1000research.125645.2 version 1 Published: 28 Sep 2022, 11:1115 https://doi.org/10.12688/f1000research.125645.1 Copyright © 2023 Siswina T et al . This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Download Export To Sciwheel Bibtex EndNote ProCite Ref. 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F1000Research 2023, 11 :1115 ( https://doi.org/10.5256/f1000research.147354.r171647 ) The direct URL for this report is: https://f1000research.com/articles/11-1115/v3#referee-response-171647 NOTE: it is important to ensure the information in square brackets after the title is included in this citation. Close Copy Citation Details Reviewer Report 03 May 2023 Anna Safitri , Research Center of Smart Molecule of Natural Genetics Resource, Universitas Brawijaya, Malang, East Java, Indonesia; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Brawijaya, Malang, East Java, Indonesia Approved VIEWS 0 https://doi.org/10.5256/f1000research.147354.r171647 I have received the following manuscript for review from F1000Research: "Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor". This is a revised version from my suggestions. I confirm ... Continue reading READ ALL I have received the following manuscript for review from F1000Research: "Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor". This is a revised version from my suggestions. I confirm that the authors have been revised the manuscript based on my comments and suggestions. Competing Interests: No competing interests were disclosed. Reviewer Expertise: Chemistry, Biochemistry I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard. Close READ LESS CITE CITE HOW TO CITE THIS REPORT Safitri A. Reviewer Report For: Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.5256/f1000research.147354.r171647 ) The direct URL for this report is: https://f1000research.com/articles/11-1115/v3#referee-response-171647 NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article. COPY CITATION DETAILS Report a concern Respond or Comment COMMENT ON THIS REPORT Version 2 VERSION 2 PUBLISHED 27 Mar 2023 Revised Views 0 Cite How to cite this report: Safitri A. Reviewer Report For: Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.5256/f1000research.145688.r169051 ) The direct URL for this report is: https://f1000research.com/articles/11-1115/v2#referee-response-169051 NOTE: it is important to ensure the information in square brackets after the title is included in this citation. Close Copy Citation Details Reviewer Report 21 Apr 2023 Anna Safitri , Research Center of Smart Molecule of Natural Genetics Resource, Universitas Brawijaya, Malang, East Java, Indonesia; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Brawijaya, Malang, East Java, Indonesia Approved with Reservations VIEWS 0 https://doi.org/10.5256/f1000research.145688.r169051 I have received the following manuscript for review from F1000Research: "Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor". General comments: I think overall the ... Continue reading READ ALL I have received the following manuscript for review from F1000Research: "Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor". General comments: I think overall the manuscript need a proof reading for the English language and grammar. The following sections required revisions: Results and Discussion; and Conclusion Results and Discussion Table 1: - The name of the species P. crocatum suddenly was changed into betel plant? In the introduction section can be mentioned that betel plant is a common name for P. crocatum. The betel leaf extract was extracted using which solvent (alcohol or other organic solvents?) I suggest the bioactive compounds contained in P. crocatum should be derived from more than 1 references. A sentence below Figure 2 here: "The bioactive compound of P. crocatum as follows Table 1 and Figure 2" . This sentence is missing a verb (grammatically incorrect). Figure 3 caption: "Illustrating of cell wall…" , should be ' an Illustration of cell wall…'. Also there are capital letters in Figure 3: A1, A2, A3, B, C, D, E, F, and these are not mentioned in the Figure caption. What are those? A sentence here above Figure 3: - "Ergosterol is a key enzyme in fungal-specific sterols, cytochrome P450 enzyme in fungi derived from S. cerevisiae, belonging to the CYP51 (lanosterol 14-α-demethylase) family, so with inhibition of biosynthesis in ergosterol, caused intermediates toxic sterol accumulation (14-α-methyl-3,6-diol) by ERG3, by binding the nitrogen atom containing heterocyclic moiety in the core ring to the iron atom of the heme domain group in the active site and preventing the formation of lanosterol demethylation, will damage cell membranes (Arthington-Skaggs et al.1999; Flowers et al. 2015)." This sentence is too long and unclear. Authors should break this sentence into 2-3 sentences. All the phytochemical content in P. crocatum , do they have activities as Lanosterol 14 alpha demethylase CYP51 inhibitor? This is because in the explanations of phytochemicals like polyphenols, tannins, saponins, it seems they don’t have activities as inhibitor for demethylase CYP51. Or these are different activities as anti fungi? These sentences before conclusion section: - "Based on the results of the review, it was found that P. crocatum contain compounds that have activity as an antifungal agent so it is expected to become a new antifungal agent that can slowly replace the extensive use of antibiotics. Therefore, new antifungal agents that safer, few side effects, cheaper, easier to get, and more potent against fungal infections are needed." I think these sentence need to be revised, since the sentences are unclear in particular the last sentence. Conclusions The conclusion section need to be revised since there are grammatical error and unclear. For example: I Natural products are an important resource…" , should be “Natural products are important resources…" Conclusion should emphasize the antifungal activities of P. crocatum . Does P. crocatum have antifungal activities by inhibiting ergosterol synthesis or as a lanosterol 14 α demethylase CYP51 inhibitor? Is the topic of the review discussed comprehensively in the context of the current literature? Yes Are all factual statements correct and adequately supported by citations? Yes Is the review written in accessible language? Partly Are the conclusions drawn appropriate in the context of the current research literature? Partly Competing Interests: No competing interests were disclosed. Reviewer Expertise: Chemistry, Biochemistry I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard, however I have significant reservations, as outlined above. Close READ LESS CITE CITE HOW TO CITE THIS REPORT Safitri A. Reviewer Report For: Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.5256/f1000research.145688.r169051 ) The direct URL for this report is: https://f1000research.com/articles/11-1115/v2#referee-response-169051 NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article. COPY CITATION DETAILS Report a concern Author Response 02 May 2023 Dikdik Kurnia , Chemistry, Padjadjaran University, Sumedang, 45363, Indonesia 02 May 2023 Author Response Evaluation for authors 1. General comments Answer : Thank you for your suggestion . The authors have revised and followed the suggestions. 2. Table 1 The name of the species P. ... Continue reading Evaluation for authors 1. General comments Answer : Thank you for your suggestion . The authors have revised and followed the suggestions. 2. Table 1 The name of the species P. crocatum suddenly was changed into betel plant? In the introduction section can be mentioned that betel plant is a common name for P. crocatum Answer : Thank you for your suggestion . The authors have added the common name of P. crocatum as Red Betel plant in the introduction. 3. Table 1 The Red Betel leaf extract was extracted using which solvent (alcohol or other organic solvents?) Answer : Thank you for the correction and suggestion. The authors have revised and added an explanation about this sentence in the narrative. 4. Table 1 I suggest the bioactive compounds contained in P. crocatum should be derived from more than 1 references Answer : Thank you for your correction and suggestion . The authors have added 4 (four) new references to P. crocatum bioactive compounds. 5. Table 1 A sentence below Figure 2 here: "The bioactive compound of P. crocatum as follows Table 1 and Figure 2". This sentence is missing a verb (grammatically incorrect). Answer : Thank you for your correction and suggestion . The authors have revised the grammar in the sentence. 6. Figure 3 "Illustrating of cell wall…", should be ' an Illustration of cell wall…'. Also there are capital letters in Figure 3: A1, A2, A3, B, C, D, E, F, and these are not mentioned in the Figure caption. What are those? Answer : Thank you for your correction and suggestion . The authors have revised the sentence and added the explanation in the figure title. 7. Narrative in Figure 3 This sentence is too long and unclear. Authors should break this sentence into 2-3 sentences. Answer : Thank you for your correction and suggestion . The authors have revised this sentence into 3 sentences as the reviewer suggested. 8. Results and discussion The explanations of phytochemicals like polyphenols, tannins, saponins, it seems they don’t have activities as inhibitor for demethylase CYP51. Or these are different activities as anti fungi? Answer : Thank you for your question and suggestion . The author will try to answer this question. Not all of the secondary metabolites in the phytochemicals of P. crocatum have antifungal activity. Based on the literature, only secondary metabolites are included in a group of compounds such as phenols, polyphenols, tannins, saponins, and flavonoids that have antifungal activity. Antifungal activity has inhibitory mechanisms in several places such as inhibiting cell wall synthesis, destroying cell membrane permeability, inhibiting nucleic acid synthesis, and damaging fungal microtubules. The inhibition of lanosterol 14a demethylase in ergosterol biosynthesis will cause inhibition of ergosterol, a key enzyme that functions to maintain the integrity and function of cell membranes in fungal and main target to antifungal sites thereby impairing the permeability of the cell membrane. The antifungal activity contained in these compounds of P. crocatum will cause fungal cell lysis. 9. Results and discussion “Based on the results of the review, it was found that P. crocatum contain compounds that have activity as an antifungal agent so it is expected to become a new antifungal agent that can slowly replace the extensive use of antibiotics. Therefore, new antifungal agents that safer, few side effects, cheaper, easier to get, and more potent against fungal infections are needed". I think these sentence need to be revised, since the sentences are unclear in particular the last sentence. Answer : Thank you for your correction and suggestion . The authors have revised this sentence. 10. Conclusions The conclusion section need to be revised since there are grammatical error and unclear. For example: Natural products are an important resource…", should be “Natural products are important resources…” Answer : Thank you for your correction and suggestion . The authors have revised and followed the suggestions. 11. Conclusions The conclusion should emphasize the antifungal activities of P. crocatum. Does P. crocatum have antifungal activities by inhibiting ergosterol synthesis or as a lanosterol 14α demethylase CYP51 inhibitor. Answer : Thank you for your correction and suggestion . The authors have revised and followed the suggestions. Evaluation for authors 1. General comments Answer : Thank you for your suggestion . The authors have revised and followed the suggestions. 2. Table 1 The name of the species P. crocatum suddenly was changed into betel plant? In the introduction section can be mentioned that betel plant is a common name for P. crocatum Answer : Thank you for your suggestion . The authors have added the common name of P. crocatum as Red Betel plant in the introduction. 3. Table 1 The Red Betel leaf extract was extracted using which solvent (alcohol or other organic solvents?) Answer : Thank you for the correction and suggestion. The authors have revised and added an explanation about this sentence in the narrative. 4. Table 1 I suggest the bioactive compounds contained in P. crocatum should be derived from more than 1 references Answer : Thank you for your correction and suggestion . The authors have added 4 (four) new references to P. crocatum bioactive compounds. 5. Table 1 A sentence below Figure 2 here: "The bioactive compound of P. crocatum as follows Table 1 and Figure 2". This sentence is missing a verb (grammatically incorrect). Answer : Thank you for your correction and suggestion . The authors have revised the grammar in the sentence. 6. Figure 3 "Illustrating of cell wall…", should be ' an Illustration of cell wall…'. Also there are capital letters in Figure 3: A1, A2, A3, B, C, D, E, F, and these are not mentioned in the Figure caption. What are those? Answer : Thank you for your correction and suggestion . The authors have revised the sentence and added the explanation in the figure title. 7. Narrative in Figure 3 This sentence is too long and unclear. Authors should break this sentence into 2-3 sentences. Answer : Thank you for your correction and suggestion . The authors have revised this sentence into 3 sentences as the reviewer suggested. 8. Results and discussion The explanations of phytochemicals like polyphenols, tannins, saponins, it seems they don’t have activities as inhibitor for demethylase CYP51. Or these are different activities as anti fungi? Answer : Thank you for your question and suggestion . The author will try to answer this question. Not all of the secondary metabolites in the phytochemicals of P. crocatum have antifungal activity. Based on the literature, only secondary metabolites are included in a group of compounds such as phenols, polyphenols, tannins, saponins, and flavonoids that have antifungal activity. Antifungal activity has inhibitory mechanisms in several places such as inhibiting cell wall synthesis, destroying cell membrane permeability, inhibiting nucleic acid synthesis, and damaging fungal microtubules. The inhibition of lanosterol 14a demethylase in ergosterol biosynthesis will cause inhibition of ergosterol, a key enzyme that functions to maintain the integrity and function of cell membranes in fungal and main target to antifungal sites thereby impairing the permeability of the cell membrane. The antifungal activity contained in these compounds of P. crocatum will cause fungal cell lysis. 9. Results and discussion “Based on the results of the review, it was found that P. crocatum contain compounds that have activity as an antifungal agent so it is expected to become a new antifungal agent that can slowly replace the extensive use of antibiotics. Therefore, new antifungal agents that safer, few side effects, cheaper, easier to get, and more potent against fungal infections are needed". I think these sentence need to be revised, since the sentences are unclear in particular the last sentence. Answer : Thank you for your correction and suggestion . The authors have revised this sentence. 10. Conclusions The conclusion section need to be revised since there are grammatical error and unclear. For example: Natural products are an important resource…", should be “Natural products are important resources…” Answer : Thank you for your correction and suggestion . The authors have revised and followed the suggestions. 11. Conclusions The conclusion should emphasize the antifungal activities of P. crocatum. Does P. crocatum have antifungal activities by inhibiting ergosterol synthesis or as a lanosterol 14α demethylase CYP51 inhibitor. Answer : Thank you for your correction and suggestion . The authors have revised and followed the suggestions. Competing Interests: No competing interests Close Report a concern Respond or Comment COMMENTS ON THIS REPORT Author Response 02 May 2023 Dikdik Kurnia , Chemistry, Padjadjaran University, Sumedang, 45363, Indonesia 02 May 2023 Author Response Evaluation for authors 1. General comments Answer : Thank you for your suggestion . The authors have revised and followed the suggestions. 2. Table 1 The name of the species P. ... Continue reading Evaluation for authors 1. General comments Answer : Thank you for your suggestion . The authors have revised and followed the suggestions. 2. Table 1 The name of the species P. crocatum suddenly was changed into betel plant? In the introduction section can be mentioned that betel plant is a common name for P. crocatum Answer : Thank you for your suggestion . The authors have added the common name of P. crocatum as Red Betel plant in the introduction. 3. Table 1 The Red Betel leaf extract was extracted using which solvent (alcohol or other organic solvents?) Answer : Thank you for the correction and suggestion. The authors have revised and added an explanation about this sentence in the narrative. 4. Table 1 I suggest the bioactive compounds contained in P. crocatum should be derived from more than 1 references Answer : Thank you for your correction and suggestion . The authors have added 4 (four) new references to P. crocatum bioactive compounds. 5. Table 1 A sentence below Figure 2 here: "The bioactive compound of P. crocatum as follows Table 1 and Figure 2". This sentence is missing a verb (grammatically incorrect). Answer : Thank you for your correction and suggestion . The authors have revised the grammar in the sentence. 6. Figure 3 "Illustrating of cell wall…", should be ' an Illustration of cell wall…'. Also there are capital letters in Figure 3: A1, A2, A3, B, C, D, E, F, and these are not mentioned in the Figure caption. What are those? Answer : Thank you for your correction and suggestion . The authors have revised the sentence and added the explanation in the figure title. 7. Narrative in Figure 3 This sentence is too long and unclear. Authors should break this sentence into 2-3 sentences. Answer : Thank you for your correction and suggestion . The authors have revised this sentence into 3 sentences as the reviewer suggested. 8. Results and discussion The explanations of phytochemicals like polyphenols, tannins, saponins, it seems they don’t have activities as inhibitor for demethylase CYP51. Or these are different activities as anti fungi? Answer : Thank you for your question and suggestion . The author will try to answer this question. Not all of the secondary metabolites in the phytochemicals of P. crocatum have antifungal activity. Based on the literature, only secondary metabolites are included in a group of compounds such as phenols, polyphenols, tannins, saponins, and flavonoids that have antifungal activity. Antifungal activity has inhibitory mechanisms in several places such as inhibiting cell wall synthesis, destroying cell membrane permeability, inhibiting nucleic acid synthesis, and damaging fungal microtubules. The inhibition of lanosterol 14a demethylase in ergosterol biosynthesis will cause inhibition of ergosterol, a key enzyme that functions to maintain the integrity and function of cell membranes in fungal and main target to antifungal sites thereby impairing the permeability of the cell membrane. The antifungal activity contained in these compounds of P. crocatum will cause fungal cell lysis. 9. Results and discussion “Based on the results of the review, it was found that P. crocatum contain compounds that have activity as an antifungal agent so it is expected to become a new antifungal agent that can slowly replace the extensive use of antibiotics. Therefore, new antifungal agents that safer, few side effects, cheaper, easier to get, and more potent against fungal infections are needed". I think these sentence need to be revised, since the sentences are unclear in particular the last sentence. Answer : Thank you for your correction and suggestion . The authors have revised this sentence. 10. Conclusions The conclusion section need to be revised since there are grammatical error and unclear. For example: Natural products are an important resource…", should be “Natural products are important resources…” Answer : Thank you for your correction and suggestion . The authors have revised and followed the suggestions. 11. Conclusions The conclusion should emphasize the antifungal activities of P. crocatum. Does P. crocatum have antifungal activities by inhibiting ergosterol synthesis or as a lanosterol 14α demethylase CYP51 inhibitor. Answer : Thank you for your correction and suggestion . The authors have revised and followed the suggestions. Evaluation for authors 1. General comments Answer : Thank you for your suggestion . The authors have revised and followed the suggestions. 2. Table 1 The name of the species P. crocatum suddenly was changed into betel plant? In the introduction section can be mentioned that betel plant is a common name for P. crocatum Answer : Thank you for your suggestion . The authors have added the common name of P. crocatum as Red Betel plant in the introduction. 3. Table 1 The Red Betel leaf extract was extracted using which solvent (alcohol or other organic solvents?) Answer : Thank you for the correction and suggestion. The authors have revised and added an explanation about this sentence in the narrative. 4. Table 1 I suggest the bioactive compounds contained in P. crocatum should be derived from more than 1 references Answer : Thank you for your correction and suggestion . The authors have added 4 (four) new references to P. crocatum bioactive compounds. 5. Table 1 A sentence below Figure 2 here: "The bioactive compound of P. crocatum as follows Table 1 and Figure 2". This sentence is missing a verb (grammatically incorrect). Answer : Thank you for your correction and suggestion . The authors have revised the grammar in the sentence. 6. Figure 3 "Illustrating of cell wall…", should be ' an Illustration of cell wall…'. Also there are capital letters in Figure 3: A1, A2, A3, B, C, D, E, F, and these are not mentioned in the Figure caption. What are those? Answer : Thank you for your correction and suggestion . The authors have revised the sentence and added the explanation in the figure title. 7. Narrative in Figure 3 This sentence is too long and unclear. Authors should break this sentence into 2-3 sentences. Answer : Thank you for your correction and suggestion . The authors have revised this sentence into 3 sentences as the reviewer suggested. 8. Results and discussion The explanations of phytochemicals like polyphenols, tannins, saponins, it seems they don’t have activities as inhibitor for demethylase CYP51. Or these are different activities as anti fungi? Answer : Thank you for your question and suggestion . The author will try to answer this question. Not all of the secondary metabolites in the phytochemicals of P. crocatum have antifungal activity. Based on the literature, only secondary metabolites are included in a group of compounds such as phenols, polyphenols, tannins, saponins, and flavonoids that have antifungal activity. Antifungal activity has inhibitory mechanisms in several places such as inhibiting cell wall synthesis, destroying cell membrane permeability, inhibiting nucleic acid synthesis, and damaging fungal microtubules. The inhibition of lanosterol 14a demethylase in ergosterol biosynthesis will cause inhibition of ergosterol, a key enzyme that functions to maintain the integrity and function of cell membranes in fungal and main target to antifungal sites thereby impairing the permeability of the cell membrane. The antifungal activity contained in these compounds of P. crocatum will cause fungal cell lysis. 9. Results and discussion “Based on the results of the review, it was found that P. crocatum contain compounds that have activity as an antifungal agent so it is expected to become a new antifungal agent that can slowly replace the extensive use of antibiotics. Therefore, new antifungal agents that safer, few side effects, cheaper, easier to get, and more potent against fungal infections are needed". I think these sentence need to be revised, since the sentences are unclear in particular the last sentence. Answer : Thank you for your correction and suggestion . The authors have revised this sentence. 10. Conclusions The conclusion section need to be revised since there are grammatical error and unclear. For example: Natural products are an important resource…", should be “Natural products are important resources…” Answer : Thank you for your correction and suggestion . The authors have revised and followed the suggestions. 11. Conclusions The conclusion should emphasize the antifungal activities of P. crocatum. Does P. crocatum have antifungal activities by inhibiting ergosterol synthesis or as a lanosterol 14α demethylase CYP51 inhibitor. Answer : Thank you for your correction and suggestion . The authors have revised and followed the suggestions. Competing Interests: No competing interests Close Report a concern COMMENT ON THIS REPORT Views 0 Cite How to cite this report: Yousaf Z. Reviewer Report For: Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.5256/f1000research.145688.r167864 ) The direct URL for this report is: https://f1000research.com/articles/11-1115/v2#referee-response-167864 NOTE: it is important to ensure the information in square brackets after the title is included in this citation. Close Copy Citation Details Reviewer Report 12 Apr 2023 Zubaida Yousaf , Lahore College for Women University, Lahore, Pakistan Approved VIEWS 0 https://doi.org/10.5256/f1000research.145688.r167864 I would like to start by thanking the authors for addressing my previous comments and making the necessary changes to improve the quality of the manuscript. Overall, I believe that the authors have done an excellent job ... Continue reading READ ALL I would like to start by thanking the authors for addressing my previous comments and making the necessary changes to improve the quality of the manuscript. Overall, I believe that the authors have done an excellent job of revising the manuscript. They have carefully addressed all of my previous concerns and have provided additional data to support their claims. In conclusion, I would like to recommend that the revised manuscript be Approved for indexing. Competing Interests: No competing interests were disclosed. Reviewer Expertise: Genetics and genomics of medicinal plants I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard. Close READ LESS CITE CITE HOW TO CITE THIS REPORT Yousaf Z. Reviewer Report For: Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.5256/f1000research.145688.r167864 ) The direct URL for this report is: https://f1000research.com/articles/11-1115/v2#referee-response-167864 NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article. COPY CITATION DETAILS Report a concern Author Response 21 Apr 2023 Dikdik Kurnia , Chemistry, Padjadjaran University, Sumedang, 45363, Indonesia 21 Apr 2023 Author Response Thank you for the decision. We are pleased to get a lot of valuable knowledge from the revisions suggested by the reviewer. It is an honor for us ... Continue reading Thank you for the decision. We are pleased to get a lot of valuable knowledge from the revisions suggested by the reviewer. It is an honor for us to be reviewed by you. Thank you. Thank you for the decision. We are pleased to get a lot of valuable knowledge from the revisions suggested by the reviewer. It is an honor for us to be reviewed by you. Thank you. Competing Interests: No competing interests Close Report a concern Respond or Comment COMMENTS ON THIS REPORT Author Response 21 Apr 2023 Dikdik Kurnia , Chemistry, Padjadjaran University, Sumedang, 45363, Indonesia 21 Apr 2023 Author Response Thank you for the decision. We are pleased to get a lot of valuable knowledge from the revisions suggested by the reviewer. It is an honor for us ... Continue reading Thank you for the decision. We are pleased to get a lot of valuable knowledge from the revisions suggested by the reviewer. It is an honor for us to be reviewed by you. Thank you. Thank you for the decision. We are pleased to get a lot of valuable knowledge from the revisions suggested by the reviewer. It is an honor for us to be reviewed by you. Thank you. Competing Interests: No competing interests Close Report a concern COMMENT ON THIS REPORT Version 1 VERSION 1 PUBLISHED 28 Sep 2022 Views 0 Cite How to cite this report: Yousaf Z. Reviewer Report For: Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.5256/f1000research.137976.r163050 ) The direct URL for this report is: https://f1000research.com/articles/11-1115/v1#referee-response-163050 NOTE: it is important to ensure the information in square brackets after the title is included in this citation. Close Copy Citation Details Reviewer Report 22 Feb 2023 Zubaida Yousaf , Lahore College for Women University, Lahore, Pakistan Approved with Reservations VIEWS 0 https://doi.org/10.5256/f1000research.137976.r163050 I have received the following manuscript for review from F1000Research: "Phytochemical profiling of Piper crocatum and its antifungal activity as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review". The following sections required revisions and modifications: Title, abstract, introduction, results and discussion and references. ... Continue reading READ ALL I have received the following manuscript for review from F1000Research: "Phytochemical profiling of Piper crocatum and its antifungal activity as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review". The following sections required revisions and modifications: Title, abstract, introduction, results and discussion and references. Title: Please ensure that you title clearly specifies whether your study focuses on fungal enzyme inhibition assay, mechanism of action or another topic. Or change your title according to the results and discussion. Your abstract and introduction is somewhat related to your title but not according to the results and discussion. Abstract: There is no information found on these lines of abstract in your results and discussion: "Its antifungal mechanisms in fungal cells occur due to ergosterol especially lanosterol 14 alpha demethylase CYP51 inhibition as a result of 5,6 desaturase (ERG3) downregulation. P. crocatum has an antifungal activity by its phytochemical profiling that act against fungi by inhibiting the fungal cytochrome P 450 pathway, make damaging cell membranes, fungal growth inhibition, morphological changes, and fungal cell lysis". Introduction: Difference in statement of study idea in introduction and abstract. Results and discussion: In heading "Ethno-botany and ethno-pharmacology of P. crocatum ". Add ethno botanical data related to plant like traditional uses and ethno-pharmacological aspects of plant. In heading "The phytochemical and chemical structures of P. crocatum". Sentence structure needs improvement. Don't repeat prepositions in sentence making. Give reasons of bio active compounds (leaf extract and essential oils) you have mentioned in table 1 and figure 2. Do these compounds have anti fungal activities? In heading "Antifungal properties and structure" these highlighted lines "Ergosterol is a key enzyme in fungal specific sterols, cytochrome P450 enzyme in fungi derived from S. cerevisiae, belonging to the CYP51 (lanosterol 14-α-demethylase) family, so with inhibition of biosynthesis in ergosterol, will damage cell membranes" . I think these are the exact lines that have reflection of title statement. So, you should provide references of this activity from different published articles here in results and discussion and also in introduction and abstract. In figure 3: Spelling mistakes in caption. References: Following amendments are required in reference list and citations: Check references according to journal format. Citations should be according to standard format. If more than 3 authors in references use et al after first author name. If 1 or 2 authors then write single or both authors’ name with year like (Mohamed 2006), (Mohammad and Jakupovie 2006), or (Mohamed et al. 2006). In case of two or more citations in the text, the citations must be arranged in chronological order. Arrange references alphabetically. Remove repetition in references. Is the topic of the review discussed comprehensively in the context of the current literature? Partly Are all factual statements correct and adequately supported by citations? Yes Is the review written in accessible language? Yes Are the conclusions drawn appropriate in the context of the current research literature? Yes Competing Interests: No competing interests were disclosed. Reviewer Expertise: Genetics and genomics of medicinal plants I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard, however I have significant reservations, as outlined above. Close READ LESS CITE CITE HOW TO CITE THIS REPORT Yousaf Z. Reviewer Report For: Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.5256/f1000research.137976.r163050 ) The direct URL for this report is: https://f1000research.com/articles/11-1115/v1#referee-response-163050 NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article. COPY CITATION DETAILS Report a concern Respond or Comment COMMENT ON THIS REPORT Comments on this article Comments (1) Version 3 VERSION 3 PUBLISHED 02 May 2023 Revised Comment ADD YOUR COMMENT Version 1 VERSION 1 PUBLISHED 28 Sep 2022 Discussion is closed on this version, please comment on the latest version above. Author Response 27 Mar 2023 Dikdik Kurnia , Chemistry, Padjadjaran University, Sumedang, 45363, Indonesia 27 Mar 2023 Author Response 1. Title Answer : Thank you for your correction and suggestion . The authors have changed the title according to antifungal mechanism action according to the results and discussion. ... Continue reading 1. Title Answer : Thank you for your correction and suggestion . The authors have changed the title according to antifungal mechanism action according to the results and discussion. 2. Abstract Answer : Thank you for the correction and suggestion . The authors have revised and re-added the explanation about this sentence in the abstract, introduction, and discussion. 3. Introduction Answer : Thank you for your correction and suggestion . The authors have changed the study idea statement in the abstract according to the introduction. 4. Results and Discussion Answer : Thank you for your correction and suggestion . The sentence in the heading “Ethno-botany and ethnopharmacology of P. crocatum” has added new data as the reviewer suggested. 5. Results and Discussion Answer : Thank you for your correction and suggestion . The authors have re-improvement the sentence structures in the heading “The phytochemical and chemical structures of P. crocatum”. 6. Results and Discussion Answer : Thank you for your correction and suggestion . The author has added the explanation as the reviewer suggested in bioactive compounds and antifungal activities. 7. Results and Discussion Answer : Thank you for your correction and suggestion . The authors have added more references according to the title statement in the abstract, introduction, results, and discussion and added 3 new Figures to explain. 8. Figure 3 Answer : Thank you for your correction and suggestion . The authors have respelled the caption mistake. 9. References Answer : Thank you for your correction and suggestion . The authors have followed the suggestions. 1. Title Answer : Thank you for your correction and suggestion . The authors have changed the title according to antifungal mechanism action according to the results and discussion. 2. Abstract Answer : Thank you for the correction and suggestion . The authors have revised and re-added the explanation about this sentence in the abstract, introduction, and discussion. 3. Introduction Answer : Thank you for your correction and suggestion . The authors have changed the study idea statement in the abstract according to the introduction. 4. Results and Discussion Answer : Thank you for your correction and suggestion . The sentence in the heading “Ethno-botany and ethnopharmacology of P. crocatum” has added new data as the reviewer suggested. 5. Results and Discussion Answer : Thank you for your correction and suggestion . The authors have re-improvement the sentence structures in the heading “The phytochemical and chemical structures of P. crocatum”. 6. Results and Discussion Answer : Thank you for your correction and suggestion . The author has added the explanation as the reviewer suggested in bioactive compounds and antifungal activities. 7. Results and Discussion Answer : Thank you for your correction and suggestion . The authors have added more references according to the title statement in the abstract, introduction, results, and discussion and added 3 new Figures to explain. 8. Figure 3 Answer : Thank you for your correction and suggestion . The authors have respelled the caption mistake. 9. References Answer : Thank you for your correction and suggestion . The authors have followed the suggestions. Competing Interests: No competing interests were disclosed. Close Report a concern Discussion is closed on this version, please comment on the latest version above. keyboard_arrow_left keyboard_arrow_right Open Peer Review Reviewer Status info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions Reviewer Reports Invited Reviewers 1 2 Version 3 (revision) 02 May 23 read Version 2 (revision) 27 Mar 23 read read Version 1 28 Sep 22 read Zubaida Yousaf , Lahore College for Women University, Lahore, Pakistan Anna Safitri , Universitas Brawijaya, Malang, Indonesia; Universitas Brawijaya, Malang, Indonesia Comments on this article All Comments (1) Add a comment Sign up for content alerts Sign Up You are now signed up to receive this alert Browse by related subjects keyboard_arrow_left Back to all reports Reviewer Report 0 Views copyright © 2023 Safitri A. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 03 May 2023 | for Version 3 Anna Safitri , Research Center of Smart Molecule of Natural Genetics Resource, Universitas Brawijaya, Malang, East Java, Indonesia; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Brawijaya, Malang, East Java, Indonesia 0 Views copyright © 2023 Safitri A. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. format_quote Cite this report speaker_notes Responses (0) Approved info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions I have received the following manuscript for review from F1000Research: "Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor". This is a revised version from my suggestions. I confirm that the authors have been revised the manuscript based on my comments and suggestions. Competing Interests No competing interests were disclosed. Reviewer Expertise Chemistry, Biochemistry I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard. reply Respond to this report Responses (0) Safitri A. Peer Review Report For: Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.5256/f1000research.147354.r171647) NOTE: it is important to ensure the information in square brackets after the title is included in this citation. The direct URL for this report is: https://f1000research.com/articles/11-1115/v3#referee-response-171647 keyboard_arrow_left Back to all reports Reviewer Report 0 Views copyright © 2023 Safitri A. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 21 Apr 2023 | for Version 2 Anna Safitri , Research Center of Smart Molecule of Natural Genetics Resource, Universitas Brawijaya, Malang, East Java, Indonesia; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Brawijaya, Malang, East Java, Indonesia 0 Views copyright © 2023 Safitri A. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. format_quote Cite this report speaker_notes Responses (1) Approved With Reservations info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions I have received the following manuscript for review from F1000Research: "Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor". General comments: I think overall the manuscript need a proof reading for the English language and grammar. The following sections required revisions: Results and Discussion; and Conclusion Results and Discussion Table 1: - The name of the species P. crocatum suddenly was changed into betel plant? In the introduction section can be mentioned that betel plant is a common name for P. crocatum. The betel leaf extract was extracted using which solvent (alcohol or other organic solvents?) I suggest the bioactive compounds contained in P. crocatum should be derived from more than 1 references. A sentence below Figure 2 here: "The bioactive compound of P. crocatum as follows Table 1 and Figure 2" . This sentence is missing a verb (grammatically incorrect). Figure 3 caption: "Illustrating of cell wall…" , should be ' an Illustration of cell wall…'. Also there are capital letters in Figure 3: A1, A2, A3, B, C, D, E, F, and these are not mentioned in the Figure caption. What are those? A sentence here above Figure 3: - "Ergosterol is a key enzyme in fungal-specific sterols, cytochrome P450 enzyme in fungi derived from S. cerevisiae, belonging to the CYP51 (lanosterol 14-α-demethylase) family, so with inhibition of biosynthesis in ergosterol, caused intermediates toxic sterol accumulation (14-α-methyl-3,6-diol) by ERG3, by binding the nitrogen atom containing heterocyclic moiety in the core ring to the iron atom of the heme domain group in the active site and preventing the formation of lanosterol demethylation, will damage cell membranes (Arthington-Skaggs et al.1999; Flowers et al. 2015)." This sentence is too long and unclear. Authors should break this sentence into 2-3 sentences. All the phytochemical content in P. crocatum , do they have activities as Lanosterol 14 alpha demethylase CYP51 inhibitor? This is because in the explanations of phytochemicals like polyphenols, tannins, saponins, it seems they don’t have activities as inhibitor for demethylase CYP51. Or these are different activities as anti fungi? These sentences before conclusion section: - "Based on the results of the review, it was found that P. crocatum contain compounds that have activity as an antifungal agent so it is expected to become a new antifungal agent that can slowly replace the extensive use of antibiotics. Therefore, new antifungal agents that safer, few side effects, cheaper, easier to get, and more potent against fungal infections are needed." I think these sentence need to be revised, since the sentences are unclear in particular the last sentence. Conclusions The conclusion section need to be revised since there are grammatical error and unclear. For example: I Natural products are an important resource…" , should be “Natural products are important resources…" Conclusion should emphasize the antifungal activities of P. crocatum . Does P. crocatum have antifungal activities by inhibiting ergosterol synthesis or as a lanosterol 14 α demethylase CYP51 inhibitor? Is the topic of the review discussed comprehensively in the context of the current literature? Yes Are all factual statements correct and adequately supported by citations? Yes Is the review written in accessible language? Partly Are the conclusions drawn appropriate in the context of the current research literature? Partly Competing Interests No competing interests were disclosed. Reviewer Expertise Chemistry, Biochemistry I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard, however I have significant reservations, as outlined above. reply Respond to this report Responses (1) Author Response 02 May 2023 Dikdik Kurnia, Chemistry, Padjadjaran University, Sumedang, 45363, Indonesia Evaluation for authors 1. General comments Answer : Thank you for your suggestion . The authors have revised and followed the suggestions. 2. Table 1 The name of the species P. crocatum suddenly was changed into betel plant? In the introduction section can be mentioned that betel plant is a common name for P. crocatum Answer : Thank you for your suggestion . The authors have added the common name of P. crocatum as Red Betel plant in the introduction. 3. Table 1 The Red Betel leaf extract was extracted using which solvent (alcohol or other organic solvents?) Answer : Thank you for the correction and suggestion. The authors have revised and added an explanation about this sentence in the narrative. 4. Table 1 I suggest the bioactive compounds contained in P. crocatum should be derived from more than 1 references Answer : Thank you for your correction and suggestion . The authors have added 4 (four) new references to P. crocatum bioactive compounds. 5. Table 1 A sentence below Figure 2 here: "The bioactive compound of P. crocatum as follows Table 1 and Figure 2". This sentence is missing a verb (grammatically incorrect). Answer : Thank you for your correction and suggestion . The authors have revised the grammar in the sentence. 6. Figure 3 "Illustrating of cell wall…", should be ' an Illustration of cell wall…'. Also there are capital letters in Figure 3: A1, A2, A3, B, C, D, E, F, and these are not mentioned in the Figure caption. What are those? Answer : Thank you for your correction and suggestion . The authors have revised the sentence and added the explanation in the figure title. 7. Narrative in Figure 3 This sentence is too long and unclear. Authors should break this sentence into 2-3 sentences. Answer : Thank you for your correction and suggestion . The authors have revised this sentence into 3 sentences as the reviewer suggested. 8. Results and discussion The explanations of phytochemicals like polyphenols, tannins, saponins, it seems they don’t have activities as inhibitor for demethylase CYP51. Or these are different activities as anti fungi? Answer : Thank you for your question and suggestion . The author will try to answer this question. Not all of the secondary metabolites in the phytochemicals of P. crocatum have antifungal activity. Based on the literature, only secondary metabolites are included in a group of compounds such as phenols, polyphenols, tannins, saponins, and flavonoids that have antifungal activity. Antifungal activity has inhibitory mechanisms in several places such as inhibiting cell wall synthesis, destroying cell membrane permeability, inhibiting nucleic acid synthesis, and damaging fungal microtubules. The inhibition of lanosterol 14a demethylase in ergosterol biosynthesis will cause inhibition of ergosterol, a key enzyme that functions to maintain the integrity and function of cell membranes in fungal and main target to antifungal sites thereby impairing the permeability of the cell membrane. The antifungal activity contained in these compounds of P. crocatum will cause fungal cell lysis. 9. Results and discussion “Based on the results of the review, it was found that P. crocatum contain compounds that have activity as an antifungal agent so it is expected to become a new antifungal agent that can slowly replace the extensive use of antibiotics. Therefore, new antifungal agents that safer, few side effects, cheaper, easier to get, and more potent against fungal infections are needed". I think these sentence need to be revised, since the sentences are unclear in particular the last sentence. Answer : Thank you for your correction and suggestion . The authors have revised this sentence. 10. Conclusions The conclusion section need to be revised since there are grammatical error and unclear. For example: Natural products are an important resource…", should be “Natural products are important resources…” Answer : Thank you for your correction and suggestion . The authors have revised and followed the suggestions. 11. Conclusions The conclusion should emphasize the antifungal activities of P. crocatum. Does P. crocatum have antifungal activities by inhibiting ergosterol synthesis or as a lanosterol 14α demethylase CYP51 inhibitor. Answer : Thank you for your correction and suggestion . The authors have revised and followed the suggestions. View more View less Competing Interests No competing interests reply Respond Report a concern Safitri A. Peer Review Report For: Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.5256/f1000research.145688.r169051) NOTE: it is important to ensure the information in square brackets after the title is included in this citation. The direct URL for this report is: https://f1000research.com/articles/11-1115/v2#referee-response-169051 keyboard_arrow_left Back to all reports Reviewer Report 0 Views copyright © 2023 Yousaf Z. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 12 Apr 2023 | for Version 2 Zubaida Yousaf , Lahore College for Women University, Lahore, Pakistan 0 Views copyright © 2023 Yousaf Z. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. format_quote Cite this report speaker_notes Responses (1) Approved info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions I would like to start by thanking the authors for addressing my previous comments and making the necessary changes to improve the quality of the manuscript. Overall, I believe that the authors have done an excellent job of revising the manuscript. They have carefully addressed all of my previous concerns and have provided additional data to support their claims. In conclusion, I would like to recommend that the revised manuscript be Approved for indexing. Competing Interests No competing interests were disclosed. Reviewer Expertise Genetics and genomics of medicinal plants I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard. reply Respond to this report Responses (1) Author Response 21 Apr 2023 Dikdik Kurnia, Chemistry, Padjadjaran University, Sumedang, 45363, Indonesia Thank you for the decision. We are pleased to get a lot of valuable knowledge from the revisions suggested by the reviewer. It is an honor for us to be reviewed by you. Thank you. View more View less Competing Interests No competing interests reply Respond Report a concern Yousaf Z. Peer Review Report For: Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.5256/f1000research.145688.r167864) NOTE: it is important to ensure the information in square brackets after the title is included in this citation. The direct URL for this report is: https://f1000research.com/articles/11-1115/v2#referee-response-167864 keyboard_arrow_left Back to all reports Reviewer Report 0 Views copyright © 2023 Yousaf Z. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 22 Feb 2023 | for Version 1 Zubaida Yousaf , Lahore College for Women University, Lahore, Pakistan 0 Views copyright © 2023 Yousaf Z. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. format_quote Cite this report speaker_notes Responses (0) Approved With Reservations info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions I have received the following manuscript for review from F1000Research: "Phytochemical profiling of Piper crocatum and its antifungal activity as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review". The following sections required revisions and modifications: Title, abstract, introduction, results and discussion and references. Title: Please ensure that you title clearly specifies whether your study focuses on fungal enzyme inhibition assay, mechanism of action or another topic. Or change your title according to the results and discussion. Your abstract and introduction is somewhat related to your title but not according to the results and discussion. Abstract: There is no information found on these lines of abstract in your results and discussion: "Its antifungal mechanisms in fungal cells occur due to ergosterol especially lanosterol 14 alpha demethylase CYP51 inhibition as a result of 5,6 desaturase (ERG3) downregulation. P. crocatum has an antifungal activity by its phytochemical profiling that act against fungi by inhibiting the fungal cytochrome P 450 pathway, make damaging cell membranes, fungal growth inhibition, morphological changes, and fungal cell lysis". Introduction: Difference in statement of study idea in introduction and abstract. Results and discussion: In heading "Ethno-botany and ethno-pharmacology of P. crocatum ". Add ethno botanical data related to plant like traditional uses and ethno-pharmacological aspects of plant. In heading "The phytochemical and chemical structures of P. crocatum". Sentence structure needs improvement. Don't repeat prepositions in sentence making. Give reasons of bio active compounds (leaf extract and essential oils) you have mentioned in table 1 and figure 2. Do these compounds have anti fungal activities? In heading "Antifungal properties and structure" these highlighted lines "Ergosterol is a key enzyme in fungal specific sterols, cytochrome P450 enzyme in fungi derived from S. cerevisiae, belonging to the CYP51 (lanosterol 14-α-demethylase) family, so with inhibition of biosynthesis in ergosterol, will damage cell membranes" . I think these are the exact lines that have reflection of title statement. So, you should provide references of this activity from different published articles here in results and discussion and also in introduction and abstract. In figure 3: Spelling mistakes in caption. References: Following amendments are required in reference list and citations: Check references according to journal format. Citations should be according to standard format. If more than 3 authors in references use et al after first author name. If 1 or 2 authors then write single or both authors’ name with year like (Mohamed 2006), (Mohammad and Jakupovie 2006), or (Mohamed et al. 2006). In case of two or more citations in the text, the citations must be arranged in chronological order. Arrange references alphabetically. Remove repetition in references. Is the topic of the review discussed comprehensively in the context of the current literature? Partly Are all factual statements correct and adequately supported by citations? Yes Is the review written in accessible language? Yes Are the conclusions drawn appropriate in the context of the current research literature? Yes Competing Interests No competing interests were disclosed. Reviewer Expertise Genetics and genomics of medicinal plants I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard, however I have significant reservations, as outlined above. reply Respond to this report Responses (0) Yousaf Z. Peer Review Report For: Phytochemical profiling of Piper crocatum and its antifungal mechanism action as Lanosterol 14 alpha demethylase CYP51 inhibitor: a review [version 3; peer review: 2 approved] . F1000Research 2023, 11 :1115 ( https://doi.org/10.5256/f1000research.137976.r163050) NOTE: it is important to ensure the information in square brackets after the title is included in this citation. The direct URL for this report is: https://f1000research.com/articles/11-1115/v1#referee-response-163050 Alongside their report, reviewers assign a status to the article: Approved - the paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations - A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. 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