HIV Infections Clinical Trial
Official title:
Interferon-Free Therapy for Chronic Hepatitis C Virus Genotype 1 Infection in Participants With HIV-1 Coinfection Receiving Concurrent Antiretroviral Therapy (C_ASCENT)
HIV and hepatitis C virus (HCV) infection are diseases that share the same risk factors and routes of transmission. For this reason, many people infected with HIV are also infected with HCV. Interferon (IFN) is a drug used to treat HCV; however, in people coinfected with HIV and HCV, IFN treatment often does not work well and can cause unwanted side effects. The purpose of this study was to evaluate the safety, tolerability, and effectiveness of IFN-free HCV treatment in HIV/HCV coinfected adults who were taking antiretroviral (ARV) therapy.
This study evaluated the safety, tolerability, and effectiveness of a combination of drugs to treat HCV in adults who were coinfected with HIV and HCV. The three drugs were paritaprevir/ritonavir/ombitasvir (PTV/r/OBT), dasabuvir (DSV), and ribavirin (RBV). In version 1 of the study, RBV was given to all participants. After revision in version 2, RBV was given only to participants with HCV genotype 1a; participants with HCV genotype 1b did not receive RBV. This study enrolled HCV genotype 1a or 1b and HIV-1 coinfected participants (HCV treatment-naïve or HCV treatment-experienced) who were on a concurrent integrase inhibitor (INI)-based (raltegravir [RAL] or dolutegravir [DTG]) or protease inhibitor (PI)-based (darunavir [DRV] or atazanavir [ATV]) ART regimen. (The ART regimens were not provided by the study.) The participants were assigned to one of four cohorts (Cohorts A, B, C, and D). Participants in Cohorts A and B were on INI-based ART; participants in Cohorts C and D, on PI-based ART. For each group, the study proceeded in two steps: Step 1: on-HCV treatment and Step 2: post-HCV treatment follow-up. Participants in Cohorts A and C received the HCV drugs for 24 weeks; participants in Cohorts B and D, for 12 weeks. The target sample size goal was a total of 100 participants, with 25 participants per cohort. Total study duration was up to 48 weeks. During Step 1 (on-HCV treatment), all participants had study visits at Weeks 2, 4, 6, 8, 10, and 12. Participants in Cohorts A and C had additional Step 1 study visits at Weeks 16, 20, and 24. All participants had Step 2 (post-treatment follow-up) study visits 4, 12, and 24 weeks after registration to Step 2. Participants in Cohorts B and D had an additional Step 2 visit 36 weeks after registration to Step 2. All study visits included a brief physical exam and blood collection. Select study visits included pregnancy testing for participants able to become pregnant, an electrocardiogram (EKG), an IFN gamma-induced protein 10 (IP-10) test, and collection of plasma samples. Participants were able to coenroll in one of two optional substudies. In one substudy, participants attended two study visits at entry/Day 0 and Week 4 for 12-hour intensive pharmacokinetic (PK) sampling. In another substudy, participants underwent liver biopsies at two time points and PK sampling. Study accrual was terminated early and participants who enrolled continued on study until completion. ;
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