Clinical trial Recruiting at 36 sites Phase 2 Interventional Ages 18 to 75

Gene silencing treatment for chronic liver disease in genetically at-risk adults

Official title: A Randomized, Double-Blind, Placebo-Controlled, Phase 2 Study of siRNA Gene Silencing for the Treatment of Metabolic Dysfunction-Associated Steatohepatitis (MASH) in Participants With Genetic Risk Factors

Run by Regeneron Pharmaceuticals · NCT05519475 · Data updated 2026-11-12

This study is testing a new drug to see if it can help adults at higher genetic risk for liver disease by reducing liver damage and inflammation.

More MASH - Metabolic Dysfunction-Associated Steatohepatitis trials

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years to 75 Years
SexAll
Enrollment120 (estimated)
SponsorRegeneron Pharmaceuticals
Industry-sponsored
Locations71 sites (Flagstaff, Arizona and 70 other locations)
StatusRecruiting
StartedFebruary 9, 2023
Main results expectedApril 27, 2028
Study endsDecember 7, 2028
Registry record updatedOctober 8, 2026
Trial IDNCT05519475 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 and older diagnosed with MASH and fibrosis stages 2 or 3.

Probably not a fit

Patients with other chronic liver diseases or a history of substance abuse may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial investigates the investigational drug ALN-HSD for treating metabolic dysfunction-associated steatohepatitis (MASH) in adults with increased genetic risk. The study aims to evaluate the drug's effectiveness in reducing liver scarring and inflammation associated with MASH. Participants will be monitored for liver function improvements, potential side effects, and the pharmacokinetics of the drug. The trial includes a placebo group for comparison.

Why it matters

Potential benefit: If successful, this treatment could significantly improve liver health and reduce the risk of severe liver complications in patients with MASH.

How similar studies have gone: While gene silencing approaches are emerging, this specific application for MASH is novel and has not been extensively tested in prior studies.

Who can join: the full rules

Show full inclusion / exclusion criteria
Key Inclusion Criteria:

1. Adult male or female ≥18 years (or country's legal age of adulthood)
2. A diagnosis of MASH with Fibrosis (F) stage 2 or 3, according to the NASH-CRN
3. NAS score ≥3, as defined in the protocol
4. Meets genotype criteria for study enrollment, as defined in the protocol
5. Has a protocol defined FibroScan®-AST (FAST) score at screening or within approximately 12 weeks of screening

Key Exclusion Criteria:

1. Evidence of other forms of known chronic liver disease, as defined in the protocol
2. Known history of alcohol or other substance abuse within the last year or at any time during screening, as defined in the protocol
3. History of Type 1 diabetes
4. Bariatric surgery within approximately 5 years prior to or planned during the study period
5. Prior exposure to any investigational drug targeting HSD17B13 or patatin-like phospholipase domain containing 3 (PNPLA3) (eg, ALN-HSD, ARO-HSD, ALN-PNP, AZD2693)

Note: Other protocol-defined Inclusion/Exclusion Criteria apply

Where it's running

  • The Institute for Liver Health II LLC DBA Arizona Liver Health - Peoria
    Peoria, Arizona, United States
    Recruiting
  • Adobe Clinical Research
    Tucson, Arizona, United States
    Recruiting
  • Arizona Liver Health - Tucson
    Tucson, Arizona, United States
    Recruiting
  • The Institute for Liver Health II LLC dba Arizona Liver Health
    Tucson, Arizona, United States
    Recruiting
  • Del Sol Research Management, LLC
    Tucson, Arizona, United States
    Recruiting
  • Southern California Research Center
    Coronado, California, United States
    Recruiting
Show 44 more locations
  • Om Research Llc
    Lancaster, California, United States
    Recruiting
  • Clinnova Research Solutions
    Orange, California, United States
    Recruiting
  • Knowledge Research Center, St. Joseph's Medical Tower
    Orange, California, United States
    Recruiting
  • California Liver Research Institute
    Pasadena, California, United States
    Recruiting
  • Inland Empire Clinical Trials
    Rialto, California, United States
    Recruiting
  • University of Colorado Anschutz Medical Campus
    Aurora, Colorado, United States
    Recruiting
  • Evolution Clinical Trials
    Hialeah Gardens, Florida, United States
    Recruiting
  • Health Awareness, inc.
    Jupiter, Florida, United States
    Recruiting
  • Genoma Research Group, Inc.
    Miami, Florida, United States
    Recruiting
  • Med Research of Florida, LLC
    Miami, Florida, United States
    Recruiting
  • Charter Research LLC - Orlando
    Orlando, Florida, United States
    Recruiting
  • Indiana University School of Medicine
    Indianapolis, Indiana, United States
    Recruiting
  • Tandem Clinical Research
    Metairie, Louisiana, United States
    Recruiting
  • GI Associates
    Flowood, Mississippi, United States
    Recruiting
  • Washington University School of Medicine
    St Louis, Missouri, United States
    Recruiting
  • Columbia University Irving Medical Center
    New York, New York, United States
    Recruiting
  • Geisinger Medical Center
    Danville, Pennsylvania, United States
    Recruiting
  • Penn State Health Milton S. Hershey Medical Center
    Hershey, Pennsylvania, United States
    Recruiting
  • University of Pennsylvania - Perelman Center for Advanced Medicine
    Philadelphia, Pennsylvania, United States
    Recruiting
  • American Research Corporation
    Austin, Texas, United States
    Recruiting
  • Pinnacle Clinical Research - Austin
    Austin, Texas, United States
    Recruiting
  • Methodist Dallas Medical Center
    Dallas, Texas, United States
    Recruiting
  • GI Alliance Research
    Fort Worth, Texas, United States
    Recruiting
  • Advanced Medical Trials
    Georgetown, Texas, United States
    Recruiting
  • Pioneer Research Solutions, Inc.
    Houston, Texas, United States
    Recruiting
  • American Research Corporation at The Texas Liver Institute
    San Antonio, Texas, United States
    Recruiting
  • Pinnacle Clinical Research - San Antonio
    San Antonio, Texas, United States
    Recruiting
  • University of Virginia Medical Center
    Charlottesville, Virginia, United States
    Recruiting
  • Richmond Veterans Administration Medical Center
    Richmond, Virginia, United States
    Recruiting
  • Fundacion de Investigacion (FDI) Clinical Research
    San Juan, Puerto Rico
    Recruiting
  • The Institute for Liver Health II LLC DBA Arizona Clinical Trials - Flagstaff
    Flagstaff, Arizona, United States
    Terminated
  • San Fernando Valley Health Institute
    Canoga Park, California, United States
    Terminated
  • Velocity Clinical Research
    Chula Vista, California, United States
    Terminated
  • Velocity Clinical Research
    Gardena, California, United States
    Terminated
  • Velocity Clinical Research - Huntington Park
    Huntington Park, California, United States
    Terminated
  • Ark Clinical Research - Long Beach
    Long Beach, California, United States
    Terminated
  • Ark Clinical Research, LLC
    Long Beach, California, United States
    Terminated
  • Velocity Clinical Research - Westlake
    Los Angeles, California, United States
    Terminated
  • National Research Institute
    Panorama City, California, United States
    Terminated
  • Cadena Care Inst.
    Poway, California, United States
    Terminated
  • Precision Research Institute - San Diego
    San Diego, California, United States
    Terminated
  • Synergy Healthcare LLC
    Bradenton, Florida, United States
    Terminated
  • Miami Clinical Research
    Miami, Florida, United States
    Terminated
  • International Medical Investigational Centers (IMIC) Incorporated
    Miami, Florida, United States
    Terminated

+21 more sites. See ClinicalTrials.gov for the full list.

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

  • Pemvidutide for noncirrhotic MASH: a phase 3 study

    This phase 3 study tests pemvidutide versus placebo in adults with noncirrhotic MASH to see if it improves liver health and safety.

    Recruiting at 9 sites Phase 3 Altimmune, Inc. · North Little Rock, Arkansas and 8 other locations · NCT07795164

  • VV-14303 for metabolic liver disease in adults with MASH

    This study tests VV-14303, a gene therapy, in adults with metabolic dysfunction-associated steatohepatitis (MASH) to see if it is safe and how well it works.

    Recruiting Phase 1/2 Kriya Therapeutics, Inc. · Chandler, Arizona and 2 other locations · NCT07732400

  • HRS-4729 and HRS9531 injections in adults with MASH

    This study tests whether HRS-4729 and HRS9531 injections (and their placebos) can help adults with metabolic dysfunction-associated steatohepatitis after 52 weeks of treatment.

    Recruiting at 2 sites Phase 2 Fujian Shengdi Pharmaceutical Co., Ltd. · Beijing, Beijing Municipality and 1 other locations · NCT07660848

  • Gut microbiota–derived amino acid metabolites in MASLD/MASH

    This study tests whether gut microbiota–produced amino acid metabolites are linked to MASLD/MASH in adults by collecting stool, blood, and urine samples and analyzing dietary factors.

    Recruiting Hospices Civils de Lyon · Pierre-Bénite · NCT07313007

  • Patients' perspectives and needs in metabolic dysfunction‑associated steatohepatitis

    This study will see what adults with MASH expect, need, and feel about their care before and after taking part in a cardiovascular health program in Barcelona.

    Recruiting at 2 sites Fundació Institut de Recerca de l'Hospital de la Santa Creu i Sant Pau · Barcelona and 1 other locations · NCT07188220

  • UBT251 treatment for metabolic dysfunction-associated steatohepatitis (MASH)

    This trial will test whether daily UBT251 (2 mg, 4 mg, or 6 mg) for 48 weeks helps adults with biopsy-confirmed MASH and moderate fibrosis compared with placebo.

    Recruiting Phase 2 The United Bio-Technology (Hengqin) Co., Ltd. · Beijing, Beijing Municipality · NCT07145151

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.