Active clinical trials for "Hepatitis C"

Anti-viral, hepatitis C virus (HCV)-specific immune T cell responses are functionally defective in patients with chronic hepatitis C and this functional impairment is believed to contribute to virus persistence. Persistent exposure to high virus loads is likely involved in the pathogenesis of T cell dysfunction. The underlying hypothesis of the project is that the level of anti-viral immune dysfunction in chronic HCV infection is a causal factor which can influence non-response to therapy. Although the rate of response to direct anti-viral agent (DAA) therapy, in untreated, non-cirrhotic, patients is between 95% and 100%, however, the response rate is lower in specific subgroups of patients, including genotype 3 cirrhotics and patients with decompensated cirrhosis, irrespective of the infecting genotype. Aim of the present study will be thus to understand whether non-response to therapy is associated with a wider and deeper anti-viral immune dysfunction, by comparing individual HCV-specific T cell responses in two groups of responder and non-responder patients. Characterization of protective immunity in non-responder patients could allow to identify baseline predictors of non-response to therapy to be used in the daily clinical practice. Objective of the study will be to compare the features (intensity and quality) of the overall HCV-specific immune T cell response in patients non-responder and responder to DAA therapy. To achieve this goal, T lymphocytes (either CD4 or CD8) isolated from the peripheral blood of the patients, before starting DAA therapy, will be stimulated with HCV proteins to evaluate the capacity of those cells to expand, produce cytokines and express cytotoxic capacity.

The study harnessed the multidisciplinary expertise of our research team to develop a brief, computer-based, alcohol reduction intervention tailored for HIV/HCV co-infected women and evaluate its efficacy. The intervention, if effective, may be an efficient and cost-effective alcohol reduction strategy, that is scalable and can be readily disseminated and integrated in clinical care at other AIDS Centres in Russia to enhance women's health and reduce HIV/HCV transmission risk.

Primary Objective: To determine the P1101 pharmacokinetic (PK) profile at the single dose of 400 μg.

Approximately one half of all Americans living with Hepatitis C virus (HCV) are drug users, yet they are the least likely to receive HCV treatment. Drug users are presumed non-adherent and therefore denied potentially life-saving therapy. This assumption can only be confirmed or dispelled through prospective pharmacologic and adherence studies in this population. Such studies would be greatly enhanced by an objective, quantitative measure of adherence which does not currently exist in the HCV field. Through the work proposed in this application, sixty HIV/HCV co-infected drug users will be treated with direct acting antiviral agents (DAA) and randomized to receive directly observed DAA therapy (DOT) vs. no directly observed therapy (no-DOT). Patients randomized to no-DOT will have wirelessly observed therapy (WOT) which involves use of a portable medication dispenser that sends a signal to a server with the date and time when the dispenser is opened. In Aim 1, DAA concentrations will be compared in those randomized to DOT vs. no-DOT. DAA pharmacokinetics will also be defined accounting for clinical factors like degree of hepatic impairment and use of concomitant recreational and antiretroviral drugs. The goal is to quantify adherence in this population and the effect of variable adherence on drug concentrations. In Aim 2, DAA concentrations (plasma, cellular, hair) will be linked with adherence patterns identified using WOT and DOT. The goal is to identify a drug concentration biomarker that predicts adherence in this population. In Aim 3, the relationship between DAA adherence (as measured by WOT and DOT and drug concentrations) and rate of cure will be established. The goal is to define the degree of adherence needed for HCV cure.

This study aims to provide the evidence that 150mg of cobicistat will have the same effect on the pharmacokinetics of daclatasvir 30mg QD as 100mg of ritonavir, when given together with atazanavir 300mg.

The primary purpose is to assess the effect of Daclatasvir (DCV)/Asunaprevir (ASV)/BMS-791325 combination therapy on the exposure of Rosuvastatin.

The primary purpose of this study is to assess the effect of the Daclatasvir/Asunaprevir/BMS-791325 fixed dose combination (FDC) tablet on the pharmacokinetics of the cocktail CYP and transporter probe substrates and to assess the effect of the DCV 3DAA FDC [DCV 3DAA FDC = fixed dose combination formulation of 3 direct-acting antivirals (3DAA) (DCV 30 mg, ASV 200 mg, and BMS-791325 75 mg)] + BMS-791325 75-mg single-agent tablet on the Pharmacokinetic (PK) of the cocktail CYP and transporter probe substrates.

The chief purpose of this research is to evaluate interferon alpha sensitivity and cell type specific levels of interferon receptor and interferon stimulated genes and proteins in HIV/ HCV (hepatitis C virus) coinfected persons before and after administration of HIV medications (antiretroviral therapy).

The purpose of this study is to investigate durability of SVR in chronic HCV patients who achieved SVR in the previous study with TMC435-containing regimen and time for resistance associated mutations to return to baseline in chronic HCV patients who did not achieve SVR in the previous study with TMC435-containing regimen.

The purpose of this study is to determine the effect of renal impairment on pharmacokinetics (PK) of BMS-914143.