Pharmacotherapy for adults with metabolic dysfunction-associated steatotic liver disease (MASLD) and metabolic dysfunction–associated steatohepatitis (MASH): a systematic review and network meta-analysis

Introduction Metabolic dysfunction-associated steatotic liver disease (MASLD) and metabolic dysfunction-associated steatohepatitis (MASH) have risen substantially in prevalence over recent decades, driven by a growing global burden of obesity, diabetes mellitus, and other cardiometabolic risk factors. In response, researchers have intensified efforts to evaluate novel and re-purposed therapies that may prevent or reverse disease progression. Although several pharmacological therapies are under investigation, robust comparative evidence on their relative effectiveness and safety remains limited. We will therefore conduct a systematic review and network meta-analysis (SRNMA) of randomized controlled trials (RCTs) evaluating pharmacological therapies for adults with MASLD or MASH.

We will search four electronic databases (Ovid MEDLINE, Embase, CINAHL and Cochrane CENTRAL) from inception to August 2025 without language and other restrictions. Eligible studies will include parallel-arm RCTs enrolling ≥10 adults per arm with MASLD or MASH; comparing any pharmacological therapy to standard care, no treatment, lifestyle modifications, placebo or alternative pharmacotherapies; and having a minimum follow-up duration of 12 weeks. Primary clinical outcomes are all-cause mortality, cardiovascular mortality, hospitalization, progression to cirrhosis, hepatic decompensation, hepatocellular carcinoma, and serious treatment-related adverse events. Surrogate outcomes include histological, imaging, biochemical, and metabolic markers of disease activity. Paired reviewers will independently screen identified hits for eligibility, extract data from eligible studies, and assess risk of bias using the Risk Of Bias instrument for Use in SysTematic reviews-for Randomised Controlled Trials (ROBUST-RCT). We will conduct separate NMAs for MASLD and MASH populations using a frequentist graph-theoretic random-effects model. Certainty of evidence will be assessed using GRADE. Subgroup and sensitivity analyses will explore effect modification by comorbidities and study quality. Ethics and Dissemination No ethics approval is required. Results will be disseminated via peer-reviewed publication and conference presentations to inform clinicians, guideline developers, and health system decision-makers. PROSPERO Registration Number CRD420251103235. Competing Interest Statement The authors have declared no competing interest. Clinical Protocols https://www.crd.york.ac.uk/PROSPERO/view/CRD420251103235 Funding Statement This study did not receive any funding. Author Declarations I confirm all relevant ethical guidelines have been followed, and any necessary IRB and/or ethics committee approvals have been obtained. Yes The details of the IRB/oversight body that provided approval or exemption for the research described are given below: As this is a systematic review and network meta-analysis, no ethics approval is required. Results will be disseminated via peer-reviewed publication and conference presentations to inform clinicians, guideline developers, and health system decision-makers. I confirm that all necessary patient/participant consent has been obtained and the appropriate institutional forms have been archived, and that any patient/participant/sample identifiers included were not known to anyone (e.g., hospital staff, patients or participants themselves) outside the research group so cannot be used to identify individuals. Yes I understand that all clinical trials and any other prospective interventional studies must be registered with an ICMJE-approved registry, such as ClinicalTrials.gov. I confirm that any such study reported in the manuscript has been registered and the trial registration ID is provided (note: if posting a prospective study registered retrospectively, please provide a statement in the trial ID field explaining why the study was not registered in advance). Yes I have followed all appropriate research reporting guidelines, such as any relevant EQUATOR Network research reporting checklist(s) and other pertinent material, if applicable. Yes Footnotes ↵* Shared first authorship. Data Availability All data included in the study will be available upon reasonable request to the authors once the study is formally published.