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.
Quick facts
| Phase | Phase 2 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 75 Years |
| Sex | All |
| Enrollment | 120 (estimated) |
| Sponsor | Regeneron Pharmaceuticals Industry-sponsored |
| Locations | 71 sites (Flagstaff, Arizona and 70 other locations) |
| Status | Recruiting |
| Started | February 9, 2023 |
| Main results expected | April 27, 2028 |
| Study ends | December 7, 2028 |
| Registry record updated | October 8, 2026 |
| Trial ID | NCT05519475 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
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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
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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
- Study coordinator: Clinical Trials Administrator
- Email: clinicaltrials@regeneron.com
- Phone: 844-734-6643
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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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.
-
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.
-
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.
-
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.
-
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.
-
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.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.