A Phase 3 interventional study of Efimosfermin alfa and Placebo in Metabolic Dysfunction-associated Steatohepatitis, sponsored by GlaxoSmithKline. Recruiting at 35 sites in 2 countries. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2026-11-05.
Sponsored by GlaxoSmithKline · Phase 3, Interventional, and Treatment
This is a multi-center, randomized, two-part (Part A and Part B) study investigating the safety and efficacy of efimosfermin alfa in adult participants with compensated cirrhosis due to MASH. Participants who complete the treatment during Part A of the study and meet the inclusion criteria will have the option to enroll in Part B (open label) of the study.
662 studies on the registry are indexed under Fatty Liver; 184 are open to participants now.
This study's planned enrollment of 380 is above the median of 60 across 431 interventional studies indexed under Fatty Liver.
Browse Fatty Liver studies →GlaxoSmithKline is the lead sponsor of 3,650 studies on the registry; 118 are open to participants now.
Of its 264 completed or terminated interventional studies of FDA-regulated products, 241 (91%) have results posted.
Compared within Fatty Liver, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Fibrosis. The counts are of registry records indexed under each term, refreshed daily. How we classify →
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Biopsy and archival tissue
A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.
Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ULN (upper limit of normal)
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants will receive efimosfermin alfa in Part A of the study.
Drug: Efimosfermin alfa
Participants will receive placebo in Part A of the study.
Drug: Placebo
All participants will receive efimosfermin alfa in Part B of the study.
Drug: Efimosfermin alfa
Efimosfermin alfa (subcutaneous injection) will be administered.
Placebo (subcutaneous injection) will be administered.
Part A: Proportion of participants achieving improvement in liver fibrosis by >=1 stage and no worsening of MASH
Participants experiencing improvement in liver fibrosis of \>=1 stage (based on MASH Clinical Research Network (CRN) fibrosis score) and no worsening of MASH (defined as no increase in nonalcoholic fatty liver disease activity score for ballooning, inflammation, or steatosis). MASH CRN fibrosis score ranges from 0 to 4, higher score indicates greater severity.
Time frame: At Week 96
Part A: Proportion of participants achieving change from Baseline in vibration-controlled transient elastography (VCTE)- liver stiffness measurement (LSM) and in enhanced liver fibrosis (ELF) score
VCTE-LSM is a non-invasive test that uses vibration-controlled transient elastography to measure the stiffness of the liver in kilopascal (kPa). ELF score (scale of 6.7 to 11.3 with higher scores indicative of increased fibrosis) is a blood-based noninvasive test used as a prognostic marker for disease progression.
Time frame: Baseline (Day 1) and Week 96
Part A Change from Baseline in VCTE-LSM
VCTE-LSM is a non-invasive test that uses vibration-controlled transient elastography to measure the stiffness of the liver in kPa.
Time frame: Baseline (Day 1) and Week 96
Part A: Proportion of participants with Treatment-Emergent Adverse Events (TEAEs) and TEAEs by severity
Time frame: Week 96
Part A: Proportion of participants with TEAEs leading to discontinuation and TEAEs leading to discontinuation by severity
Time frame: Week 96
Part A: Proportion of participants with Grade 3 and Grade 4 laboratory abnormalities
Time frame: Week 96
Plan to share: Yes — Study Sponsor will assess requests from qualified researchers for anonymized individual patient-level data and related study documents. Data sharing is subject to certain criteria, conditions, and exceptions. For further information, refer to https://www.gsk-studyregister.com/gsk-patient-level-data-sharing-july2025.pdf
Supporting information: Study protocol, Statistical analysis plan, Informed consent form, Clinical study report
Time frame: Anonymized IPD will be made available within 6 months of publication of primary, key secondary and safety results for studies in product with approved indication(s) or asset(s) with development terminated across all indications.
Access criteria: Anonymized IPD is shared with researchers whose proposals are approved by an Independent Review Panel and after a Data Sharing Agreement is in place. Access is provided for an initial period of 12 months, but an extension may be granted, when justified, for up to 6 months.
Data sharing details ↗ · www.gsk-studyregister.com
No publications or documents are linked to this record.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
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Studies of the drug tested here: Efimosfermin alfa