A Study to Assess the Safety, Pharmacokinetics, and Activity of RO7790121 in Participants With Advanced MASH Liver Fibrosis

The purpose of this study is to assess the safety, pharmacokinetics (PK), pharmacodynamics (PD), immunogenicity and activity of RO7790121 in participants with advanced metabolic dysfunction-associated steatohepatitis (MASH) fibrosis.

Inclusion Criteria: * Body mass index within the range of \>= 25 and \=12.0 kPa and \5% in the 3 months prior to baseline or \>10% in the 6 months prior to baseline * Bariatric surgery within 1 year prior to baseline * Current signs or prior history of decompensated liver disease * Complications or clinical evidence of portal hypertension * Lack of peripheral venous access * Other causes of liver disease based on medical history and/or centralized review of liver histology * History of liver transplantation * Current or prior history of hepatocellular carcinoma (HCC) * Uncontrolled hypertension * Concomitant Type 1 diabetes, or Type 2 diabetes with HbA1c \>10% * History of malignancy within 5 years prior to screening, with the exception of malignancies with a negligible risk of metastasis or death * Current, significant alcohol consumption or a history of significant alcohol consumption for a period of more than 3 consecutive months any time within 1 year prior to screening * Initiation of a medication of an antidiabetic, weight loss, lipid-modifying or anti-depressant drug class * Active tuberculosis requiring treatment within the 12 months prior to baseline * History of organ transplant