Safety, Tolerability and Efficacy of XTL 2125 in HCV-Infected Patients Who Are Interferon-Alpha Non-Responders or Relapsers

Chronic Hepatitis C Virus Infection Clinical Trial

Official title: A Multicenter, Randomized, Double-Blind, Placebo Controlled, Dose Escalation Study of the Safety and Efficacy of XTL 2125 in Adult HCV-Infected Patients With Compensated Liver Disease, Who Are Interferon-Alpha Non-Responders or Have Relapsed From Interferon-Alpha Therapy

Status Withdrawn

Clinical Trial Summary

The study will be a randomized, double blind, placebo controlled, dose rising study in Interferon alpha (IFN-alpha) non-responder HCV infected patients or HCV patients who have relapsed following IFN-alpha therapy. Eligible subjects must have compensated liver disease and serum HCV RNA concentrations above 100,000 IU/mL at screening. The study will include both a single dose period for the evaluation of acute toxicity and single dose pharmacokinetics and a consecutive multi-dose period for the determination of longer-term safety, multiple-dose pharmacokinetics and antiviral activity. The objectives of this study are to evaluate the safety, tolerability, and antiviral activity of escalating single and multiple doses of XTL 2125 in patients with chronic hepatitis C virus infection and to assess the single- and multiple-dose pharmacokinetics of XTL 2125

Clinical Trial Description

The study will be of a randomized, double blind, placebo controlled, multicenter design with sequential ascending doses of XTL 2125 in HCV-infected patients with compensated liver disease who did not respond to IFN-alpha therapy or relapsed following this therapy.

This study will include both a single dose session and a multiple dose session. In the single dose session, patients will be randomized to receive a single oral dose of either XTL 2125 or placebo on Day 1, in a dose-escalating design, followed by a multiple dose session that will start on day 8 and will continue for 14 days. The same patients will receive XTL 2125 three times daily at the same dose administered in the single dose session.

The following doses will be administered to groups of 8 patients each: 10 mg, 25 mg, 50 mg, 150 mg, 300 mg and 450 mg. Within each group, 6 subjects will receive XTL 2125 and 2 subjects will receive placebo. No patient will be enrolled in more than one dose level. Doses should be administered one hour before meals with 240 cc water.

Additional patients may be enrolled at previous or intermediate doses to obtain additional safety or pharmacokinetic/pharmacodynamic data and to more accurately define the Maximum Tolerated Dose (MTD).

The MTD will be defined as the last dose level that is successfully administered with a decision to escalate to the next level. If the decision not to escalate to the next level is made then a cohort that receives XTL 2125 at a dose half-way between the last tolerated dose and the non-tolerated dose may be enrolled at the discretion of the Sponsor. If this dose is successfully administered without violating the dose escalation rules, then this interim dose will be considered the MTD.

Six dose cohorts will be prospectively indicated, although additional cohorts may be scheduled at intermediate doses if warranted by the data. ;

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Double-Blind, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Chronic Hepatitis C Virus Infection
• Hepatitis C
• Hepatitis C, Chronic
• Hepatitis, Chronic
• Virus Diseases

• NCT number: NCT00255359
• Study type: Interventional
• Source: Hadassah Medical Organization
• Status: Withdrawn
• Phase: Phase 1
• Start date: February 2006
• Completion date: November 2007