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Cenicriviroc, an oral chemokine receptor CCR/5 antagonist, was well tolerated, although it did not best placebo across all study endpoints, according to results of a 1-year phase IIb study released in an abstract in advance of the annual meeting of the American Association for the Study of Liver Diseases.
A correlation between treatment benefit and disease severity was reported by Arun J. Sanyal, MD, of Virginia Commonwealth University in Richmond, and coworkers, however.
In the 2-year, multinational, phase IIb, double-blind CENTAUR (Efficacy and Safety Study of Cenicriviroc for the Treatment of NASH in Adult Subjects With Liver Fibrosis) study, 289 adults with chronic liver disease were randomly assigned to either 150 mg cenicriviroc (CVC) once daily or to placebo. At baseline, study participants had either histologically defined nonalcoholic steatohepatitis, a nonalcoholic fatty liver disease score (NAS) of 4 or greater, or liver fibrosis between stages 1 and 3. Just over half of the cohort were women, 72% had metabolic syndrome, and 53% had diabetes. Three-quarters had an NAS score of 5 or higher, and 67% had fibrosis between stages 2 and 3. The mean body mass index across the study was 34 kg/m2.
At 1 year, liver biopsy showed that 16% of the CVC group had achieved at least a 2-point improvement in NAS, 3% less than controls (P = .519). Resolution of steatohepatitis with no worsening of fibrosis was higher in the study arm, compared with controls: 8% vs. 6% (P = .494). A significant difference was seen in members of the study arm who had advanced disease characteristics at baseline, compared with controls, by at least one stage in fibrosis improvement, with no worsening of steatohepatitis (P = .023). Across the study, improvement in fibrosis by two stages was seen in eight patients given CVC and in three controls. Progression to cirrhosis occurred in two members of the study arm and in five controls.
Adverse treatment-related events were similar across the study. The most commonly reported were fatigue (2.8%) and diarrhea (2.1%) in the study arm and headache (3.5%) in controls.
Most of the researchers associated with this study have industry relationships, including Brian L. Wiens, PhD, Pamela Vig, PhD, Star Seyedkazemi, PharmD, and Eric Lefebvre, MD, all of whom are employed by study sponsor, Tobira Therapeutics.
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