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Safety, Tolerability, and Preliminary Efficacy of the Anti-Fibrotic Small Molecule PRI-724, a CBP/?-Catenin Inhibitor, in Patients with Hepatitis C Virus-related Cirrhosis: A Single-Center, Open-Label, Dose Escalation Phase 1 Trial.


ABSTRACT: There is currently no anti-fibrotic drug therapy available to treat hepatitis C virus (HCV) cirrhosis. The aim of this study was to assess the safety, tolerability, and anti-fibrotic effect of PRI-724, a small-molecule modulator of Wnt signaling, in patients with HCV cirrhosis.In this single-center, open-label, phase 1 trial, we sequentially enrolled patients with HCV cirrhosis who were classified as Child-Pugh (CP) class A or B. PRI-724 was administered as a continuous intravenous infusion of 10, 40, or 160mg/m2/day for six cycles of 1week on and 1week off. The primary endpoints were frequency and severity of adverse events. The secondary endpoint was efficacy of PRI-724 in treating cirrhosis based on CP score and liver biopsy. This study is registered with ClinicalTrials.gov (no. NCT02195440).Between Sept 3, 2014 and May 2, 2016, 14 patients were enrolled: CP class A:B, 6:8; median age, 62 (range: 43 to 74) years; male:female, 10:4. Twelve of the 14 patients completed six cycles of treatment; one was withdrawn from the study due to possible study drug-related liver injury (grade 3) in the 160mg/m2/day dose cohort and one withdrew for personal reasons. Serious adverse events occurred in three patients [21% (3/14)], one of which was possibly related to PRI-724. The most common adverse events were nausea [29% (4/14)] and fatigue [21% (3/14)]. After PRI-724 administration, the CP scores worsened by 1 point in two patients in the 10mg/m2/day cohort, improved in three patients at 1, 1, and 2 points in the 40mg/m2/day cohort, and improved in one patient by 3 points in the 160mg/m2/day cohort. The histology activity index scores of the liver tissue improved in two patients and exacerbated in two patients in the 10mg/m2/day cohort, and improved in one patient in the 40mg/m2/day cohort.This study showed that administration of 10 or 40mg/m2/day intravenous PRI-724 over 12weeks was well-tolerated by patients with HCV cirrhosis; however, liver injury as a possible related serious adverse event was observed in the 160mg/m2/day cohort.AMED.

SUBMITTER: Kimura K 

PROVIDER: S-EPMC5605374 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature

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Safety, Tolerability, and Preliminary Efficacy of the Anti-Fibrotic Small Molecule PRI-724, a CBP/β-Catenin Inhibitor, in Patients with Hepatitis C Virus-related Cirrhosis: A Single-Center, Open-Label, Dose Escalation Phase 1 Trial.

Kimura Kiminori K   Ikoma Akemi A   Shibakawa Maki M   Shimoda Shinji S   Harada Kenichi K   Saio Masanao M   Imamura Jun J   Osawa Yosuke Y   Kimura Masamichi M   Nishikawa Koji K   Okusaka Takuji T   Morita Satoshi S   Inoue Kazuaki K   Kanto Tatsuya T   Todaka Koji K   Nakanishi Yoichi Y   Kohara Michinori M   Mizokami Masashi M  

EBioMedicine 20170819


<h4>Background</h4>There is currently no anti-fibrotic drug therapy available to treat hepatitis C virus (HCV) cirrhosis. The aim of this study was to assess the safety, tolerability, and anti-fibrotic effect of PRI-724, a small-molecule modulator of Wnt signaling, in patients with HCV cirrhosis.<h4>Methods</h4>In this single-center, open-label, phase 1 trial, we sequentially enrolled patients with HCV cirrhosis who were classified as Child-Pugh (CP) class A or B. PRI-724 was administered as a c  ...[more]

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