Active clinical trials for "Hepatitis C"

Epclusa® is a pan-genotypic, once-daily tablet for the treatment of chronic hepatitis C virus (HCV) infection containing the NS5B- polymerase inhibitor sofosbuvir (SOF, nucleotide analogue) 400 mg and the NS5A inhibitor velpatasvir (VEL) 100 mg. Velpatasvir has pH dependent absorption. At higher pH the solubility of velpatasvir decreases. It has been shown that in subjects treated with proton pump inhibitors (PPIs) such as omeprazole, the absorption of velpatasvir is reduced by 26-56%, depending on the dose of omeprazole, concomitant food intake, and timing/sequence of velpatasvir vs. omeprazole intake. As a result, concomitant intake of PPIs with velpatasvir is not recommended. For a number of reasons, the prohibition of PPI use with velpatasvir is a clinically relevant problem. First, PPI use is highly frequent in the HCV-infected subject population with prevalences reported up to 40%. Second, PPIs are available as over-the-counter medications and thus can be used by subjects without informing their physician. Third, although HCV therapy is generally well tolerated, gastro-intestinal symptoms such as abdominal pain and nausea are frequently reported, which my lead to PPI use. One solution of this problem could be the use of other acid-reducing agents such as H2-receptor antagonists or antacids. In general, they have a less pronounced effect on intragastric pH, and are considered less effective than PPIs by many patients and physicians. A second solution would be the choice of another HCV agent or combination that is not dependent on low gastric pH for its absorption such as daclatasvir. Daclatasvir, however, is not a pan-genotypic HCV agent and may be less effective against GT 2 and 3 infections than velpatasvir. Second, not all subjects have access to daclatasvir, depending on health insurance company or region where they live. A third solution, and the focus of this COPA study, is to add a glass of the acidic beverage cola at the time of velpatasvir administration in subjects concurrently treated with PPIs. This intervention has been shown to be effective for a number of drugs from other therapeutic classes who all have in common a reduced solubility (and thus reduced absorption) at higher intragastric pH, namely erlotinib, itraconazole, ketoconazole. The advantages of this approach are: (1) only a temporary decrease in gastric pH at the time of cola intake; the rest of the day the PPI will have its therapeutic effect (2) cola is available worldwide (3) the administration of cola can be done irrespective to the timing of PPI use.

Hepatitis C virus infection (HCV) is a major cause of cirrhosis and death from liver disease worldwide. Current therapy for HCV with interferon based therapies results in cure rates of around 5055% which leaves a significant number of patients without effective therapy. HCV induces (can bring on) insulin resistance and insulin resistance is a factor known to reduce the response to antiHCV therapy. This finding stimulated initial studies looking at agents that may reduce insulin resistance as additional therapy in HCV infection. A study using metformin in addition to interferon and ribavirin showed a nonsignificant increase in cure rates (53% vs. 42%), but this was limited to patients with type 1 infection AND demonstrable insulin resistance. The assumption was made that the potential effect of metformin was likely to be on insulin resistance and thus by modulating this enhances response. The investigators (Prof M Harris, University of Leeds) have data (currently unpublished)suggesting that metformin may have an antiviral effect independent of its effect on insulin resistance, thus raising the possibility that metformin may have a direct antiviral effect in vivo. Given that the development of specific antiHCV agents which target viral proteins such as its polymerase and protease are in trial development but have so far proved either highly toxic or are likely to have a huge cost there is considerable rationale for looking at alternative potential antiHCV agents and in this context metformin is cheap, readily available and has an excellent safety profile. This pilot study therefore addresses the question "Does metformin therapy result in a significant drop in HCV viral load in chronically infected patients?"

This study will evaluate the effect of ledipasvir/sofosbuvir (LDV/SOF) treatment on the pharmacokinetics (PK) and renal safety of tenofovir in the form of tenofovir alafenamide (TAF). Subjects living with human immunodeficiency virus (HIV) who are receiving tenofovir-based antiretroviral therapy (in the form of tenofovir disoproxil fumarate [TDF]), and are also taking a ritonavir- or cobicistat-boosted protease inhibitor will be invited to participate. The study will consist of five visits: a screening visit, three abbreviated 4-hour pharmacokinetic visits, and one end-of-study follow-up visit. Subjects will also be asked to use a Wisepill device, which will track medication adherence throughout the study.

Infection with hepatitis C virus (HCV), a hepatotropic RNA virus, is often chronic, and causes liver cirrhosis and liver cancer. The virus is transmitted through parenteral exposure. This infection is particularly common in those on maintenance hemodialysis. Sofosbuvir, an inhibitor of HCV RNA-dependent RNA polymerase, forms the backbone of DAA-based anti-HCV treatment regimens. In pre-clinical pharmacokinetic studies, administration of the usual 400 mg daily dose to in presence of advanced kidney failure (estimated glomerular filtration rate [eGFR] of <30 ml/min) showed that serum levels of the sofosbuvir and GS-331007, the primary metabolite of sofosbuvir, were elevated by several folds. Hence, sofosbuvir is not approved for use in people on maintenance hemodialysis. The newer DAAs (e.g. grazoprevir/elbasvir combination), which have been approved for use in people with eGFR <30 ml/min, are very costly and are not available in Asian countries including India. Hence, as a rescue measures, several physicians, including our group, have tried half-daily dose (i.e, 200 mg daily or 400mg on alternate days) of sofosbuvir and 60 mg daclatasvir in dialysis-dependent people, with good results in terms of both safety and efficacy. In fact, the use of this empirical 200 mg daily dose schedule has become common in clinical practice. However, this use is not based on any pharmacokinetic data. Hence, it is proposed to study the pharmacokinetics of low-dose (200 mg daily or 400 mg alternate day) of sofosbuvir and GS-331007 metabolite in people with eGFR <30/min and active HCV infection.

The goal of this study is to assess patients' attitudes and knowledge of Hepatitis C, analyze the variables that may influence patients' knowledge, and educate patients on Hepatitis C.

Incorporating Hepatitis C Virus (HCV) treatment into opioid maintenance treatment program clinical protocols is an innovative health care delivery model that has been associated with improved HCV treatment uptake in non-pregnant, drug-using populations. This "medical home" approach would combine HCV and opioid maintenance treatment into one treatment regimen and incorporate the expertise of obstetricians, hepatologists, substance abuse treatment providers and pediatricians into one comprehensive clinical care model. The purpose of this study is to evaluate the feasibility/acceptability of a combined, peripartum HCV and opioid maintenance treatment program on adherence to HCV treatment regimens and evaluate the rate of intravenous drug use (IVDU) recidivism, HCV reinfection and health related Quality of Life (QOL) in women with opioid use disorder (OUD) during the first postpartum year. The protocol involves three separate study phases. All 3 study phases will occur with support from hepatology providers at Magee-Womens Hospital. Phase 1 involves screening, enrollment and a baseline assessment of liver function, HCV infection (genotype, viral load) and blood and urine studies in HCV-infected patients during pregnancy. In Phase 2, subjects will undergo 12 weeks of sofosbuvir/velpatasvir therapy initiated at 2 weeks postpartum. Feasibility/acceptability and adherence to sofosbuvir/velpatasvir will be assessed at 4, 8 and 12 weeks of therapy. In Phase 3, subjects will continue to be followed for 15 months after treatment completion. Treatment effectiveness and sustained virologic response (SVR) will be evaluated at 3 months and rates of IVDU recidivism, HCV reinfection and patient centered outcomes such as health related quality of life (QOL) will be assessed at 6, 9 and 12 months following treatment completion.

The purpose of this study is to follow-up with participants from feeder studies who achieved sustained virologic response (SVR) over 24 hours posttreatment (SVR24), to assess durability of SVR, and to assess the changes in liver disease, development of hepatocellular carcinoma and post-treatment safety over time. Participants enter this study from feeder studies CDEB025A2210 (NCT01183169), CDEB025A2301 (NCT01318694), and CDEB025A2211 (NCT01215643). They return to the site for up to 48 weeks with a maximum of 3 visits. No treatment is involved.

This study will evaluate the referral to harm reduction services (HRS) including syringe services, naloxone overdose prevention, substance use treatment referral, HIV, HCV, and STD testing and referral and linkage to care through capacity building of existing programs through client services data.

The purpose of this study is to: Assess the relative bioavailability of 2 oral formulations of samatasvir (capsule and tablet prototype test formulation) Compare the amount of study drug that is in the blood after taking either the capsule form of the drug or the tablet form of the drug while fasting. Determine the amount of study drug that is in the blood after eating a meal. Evaluate the safety of the tablet form of samatasvir in healthy people.

This 2-part, randomized, double-blind, placebo-controlled study will assess the safety, pharmacokinetics and pharmacodynamics of RO5428029 in healthy volunteers and patients with hepatitis C infection. Cohorts will be randomized to receive either RO5428029 in ascending doses or placebo for up to 7 days (patients) or up to 14 days (healthy volunteers).