Avaliação do efeito do açaí (Euterpe oleracea) em modelo de endometriose, e descrição dos dados de toxicidade e do efeito anticancerígeno do açaí em modelos experimentais

In: reponame:Repositório Institucional da FIOCRUZ (ARCA) · 2018 · W2838864148
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In Sprague-Dawley rats, Euterpe oleracea extract reduced endometriosis lesion size and angiogenesis without toxicity while demonstrating anticancer activity in macrophages and preclinical tumor models.

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This study evaluated the pharmacological effects of Euterpe oleracea (açaí) extract on an experimental endometriosis model using Sprague-Dawley rats treated with 200 mg/kg for 30 days. Histological analysis revealed atrophy and regression of lesions, while molecular assays demonstrated a significant reduction in angiogenesis and inflammation markers such as VEGF, COX-2, and MMP-9 compared to controls. The research further confirmed the safety of the treatment by observing no toxicity signs in animals and noted antitumor activity in macrophage cells and other cancer models through a literature review. This paper is centrally about endometriosis — specifically investigating the potential of açaí extract as an anti-inflammatory and anti-angiogenic therapeutic agent for the condition.

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Abstract

Endometriosis is a gynecological disease that affects 10% of women on reproductive age, which causes clinical symptoms at different intensities, damaging the quality of life. The pharmacological treatment is based on the symptoms' relief, since there is no therapy capable of eradicating the disease. Among the processes involved in the pathophysiology of endometriosis, angiogenesis and inflammation are fundamental. The Euterpe oleraceaextract (acai) has been described as a possible candidate for drug development due to its properties antioxidant, anti-inflammatory and anticancer. Therefore, the present study aimed to evaluate the pharmacological effect of acai in the treatment of experimental endometriosis and to describe the safety / toxicity and anticancer data of acai utilization in preclinical models. In the experimental model of endometriosis, the treated group (n = 10, Sprague-Dawley rats) received 200 mg / kg of the acai extract via gavage for 30 days and the control group (n = 10) received vehicle.In the histological analysis it was possible to observe atrophy and regression of the lesions. Immunohistochemical analyzes (Vascular endothelial growth factor -VEGF, VEGFreceptor -VEGFR-2, cyclooxygenase-2 -COX-2, metalloproteinase-9 -MMP-9 and F4-80), real-time PCR expression (VEGF, VEGFR-2, MMP-9 and COX-2), ELISA (VEGF and PGE2), flow cytometry (F4-80) and biochemistry (nitric oxide) indicated a significant reduction of angiogenesisand inflammationin the acai treated group when compared to the control group. No evidence of toxicity was observed in the dose of acai administered, as compared to controls, based on weight, feed and activity of the animals. In addition, macrophage cells treated with 20 to 40 μg / ml acai had a 50% reduction in cell viability after 24, 48 and 72 h. A literature review was also conducted using four international databases to identify publications that studied the used of acai extract in experimental animal models of cancer (n = 6) and / or evaluated the safety / toxicity of acai in preclinical models(n = 3) using a methodological rigor (QATRS) to enable better quality control. Acai had antitumor activity, reducing the incidence and size of tumors, and did not present genotoxic effects. As a conclusion, it is possible to suggest that acai is effective in the treatment of endometriosis and can be considered a promising pharmacological treatment without causing adverse effects. In addition, it is suggested that acai may be used as a safe, chemopreventive and anticancer agent
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Avaliação do efeito do açaí (Euterpe oleracea) em modelo de endometriose, e descrição dos dados de toxicidade e do efeito anticancerígeno do açaí em modelos experimentais Avaliação do efeito do açaí (Euterpe oleracea) em modelo de endometriose, e descrição dos dados de toxicidade e do efeito anticancerígeno do açaí em modelos experimentais Avaliação do efeito do açaí (Euterpe oleracea) em modelo de endometriose, e descrição dos dados de toxicidade e do efeito anticancerígeno do açaí em modelos experimentais A endometriose é uma doença ginecológica que afeta 10% das mulheres em idade reprodutiva, causando sintomas clínicos em diferentes intensidades, prejudicando a qualidade de vida. O tratamento farmacológico baseia-se no alívio dos sintomas, uma vez que não há terapia capaz de erradicar a doença. Entre os processos envolvidos na fisiopatologia da endometriose, a angiogênese ea inflamação são fundamentais. O extrato de Euterpe oleracea(açaí) tem sidodescrito como um possível candidato para o desenvolvimento de fármacos devido às suas propriedades antioxidantes, anti-inflamatórias e anticancerígenas. Portanto, o presente estudo teve como objetivo avaliar o efeito farmacológico do açaí no tratamento da endometriose experimental e descrever a segurança/toxicidade e dados anticancerígenos da utilização do açaí em modelos pré-clínicos. No modelo experimental de endometriose, o grupo tratado (n=10, ratos Sprague-Dawley) recebeu 200 mg/kg do extrato de açaí via gavagempor 30 dias e o grupo controle (n=10) recebeu veículo. Na análise histológica foi possível observar atrofia e regressão das lesões. Análises imuno-histoquímicas (Fator de crescimento endotelial vascular -VEGF, seu receptor-VEGFR-2, ciclooxigenase-2 -COX-2, metaloproteinase-9-MMP-9 e F4-80), expressão de PCR em tempo real (VEGF, VEGFR-2, MMP-9 e COX-2), ELISA (VEGF e PGE2), citometria de fluxo (F4-80) e bioquímica (óxido nítrico) indicaram redução significativa da angiogênese e inflamação no grupo tratado com açaí quando comparada à grupo de controle. Nenhuma evidência de toxicidade foi observada na dose de açaí administrada, em comparação com os controles, com base no peso, alimentação e atividade dos animais. Além disso, as células de macrófagos tratadas com açaí de 20 a 40 μg/ml apresentaram redução de 50% na viabilidade celular após 24, 48 e 72 h. Uma revisão da literatura também foi realizada usando quatro bases de dados internacionais para identificar publicações que estudaram o extrato de açaí utilizado em modelos animais experimentais de câncer (n=6) e/ou avaliaram a segurança/toxicidade do açaí em modelos pré-clínicos(n= 3) usando um rigor metodológico (QATRS) para permitir um melhor controle de qualidade. Açaí teve atividade antitumoral, reduzindo a incidência e o tamanho dos tumores e não apresentou efeitos genotóxicos. Como conclusão, é possível sugerir que o açaí é eficaz no tratamento da endometriose e pode ser considerado um tratamento farmacológico promissor sem causar efeitos adversos. Além disso, sugere-se que o açaí possa ser utilizado como agente seguro, quimiopreventivo e anticancerígeno item.page.abstracten Endometriosis is a gynecological disease that affects 10% of women on reproductive age, which causes clinical symptoms at different intensities, damaging the quality of life. The pharmacological treatment is based on the symptoms' relief, since there is no therapy capable of eradicating the disease. Among the processes involved in the pathophysiology of endometriosis, angiogenesis and inflammation are fundamental. The Euterpe oleraceaextract (açaí) has been described as a possible candidate for drug development due to its properties antioxidant, anti-inflammatory and anticancer. Therefore, the present study aimed to evaluate the pharmacological effect of açaí in the treatment of experimental endometriosis and to describe the safety / toxicity and anticancer data of açaí utilization in preclinical models. In the experimental model of endometriosis, the treated group (n = 10, Sprague-Dawley rats) received 200 mg / kg of the açaí extract via gavage for 30 days and the control group (n = 10) received vehicle.In the histological analysis it was possible to observe atrophy and regression of the lesions. Immunohistochemical analyzes (Vascular endothelial growth factor -VEGF, VEGFreceptor -VEGFR-2, cyclooxygenase-2 -COX-2, metalloproteinase-9 -MMP-9 and F4-80), real-time PCR expression (VEGF, VEGFR-2, MMP-9 and COX-2), ELISA (VEGF and PGE2), flow cytometry (F4-80) and biochemistry (nitric oxide) indicated a significant reduction of angiogenesisand inflammationin the açaí treated group when compared to the control group. No evidence of toxicity was observed in the dose of açaí administered, as compared to controls, based on weight, feed and activity of the animals. In addition, macrophage cells treated with 20 to 40 μg / ml açaí had a 50% reduction in cell viability after 24, 48 and 72 h. A literature review was also conducted using four international databases to identify publications that studied the used of açaí extract in experimental animal models of cancer (n = 6) and / or evaluated the safety / toxicity of açaí in preclinical models(n = 3) using a methodological rigor (QATRS) to enable better quality control. Acai had antitumor activity, reducing the incidence and size of tumors, and did not present genotoxic effects. As a conclusion, it is possible to suggest that açaí is effective in the treatment of endometriosis and can be considered a promising pharmacological treatment without causing adverse effects. In addition, it is suggested that açaí may be used as a safe, chemopreventive and anticancer agent Fundação Oswaldo Cruz, Escola Nacional de Saúde Pública Sergio Arouca item.page.degreedate item.page.degreelocal Rio de Janeiro/RJ item.page.degreeprogram Programa de Pós-Graduação em Saúde Pública e Meio Ambiente Citation BAPTISTA, Karina Cristina Rodrigues. Avaliação do efeito do açaí (Euterpe oleracea) em modelo de endometriose, e descrição dos dados de toxicidade e do efeito anticancerígeno do açaí em modelos experimentais. 2018. 126 f. Dissertação (Mestrado em Saúde Pública e Meio Ambiente) - Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz, Rio de Janeiro, 2018.

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