Peginterferon and Ribavirin on Virologic and Immunologic Parameters in Hepatitis C Mono- and Coinfected Patient (PRIVICOP)

Request for Blood Samples to Examine the Effect of Peginterferon and Ribavirin on Virologic and Immunologic Parameters in Patients With Hepatitis C and in Patients Coinfected With Hepatitis C and HIV

Hepatitis C and HIV infect worldwide millions of people leading to a high rate of coinfected patient with eventually liver cirrhosis and endstage liver disease. With the currently best available therapy (peginterferon and ribavirin) only less than 50% of patients with HCV genotype 1 will respond. Unknown is what factors determine this difference in treatment outcome. Probably virologic and immunologic factors play a major role. By investigating blood samples of HCV / HIV coinfected patients and HCV mono-infected patients we would like to examine both virologic and immunologic factors possibly responsible for this difference.

Study Overview

• Status: Completed
• Conditions: HIV Infections; Hepatitis C
• Intervention / Treatment: Procedure: venous blood puncture

Detailed Description

background: each year the Hepatitis C (HCV) and the human immunodeficiency virus (HIV) infect worldwide millions of people. In the western world coinfection of HIV with HCV mainly exists in intravenous drug users. In coinfected patients progression of liver fibrosis to cirrhosis and endstage liver disease is much faster than in patients with only a mono-infection of hepatitis C. With the current treatment regimes response rates differ between HCV genotypes and between coinfected and mono-infected patients. Reasons for this a yet not well understood.

Virology: In the treatment of HCV genotype 1, after 12 weeks treatment success is evaluated (EVR) and if the HCV RNA-load is insufficiently dropped the treatment is stopped. There are indications that this moment of evaluation can be done earlier. Whole blood analysis can be a more sensitive method to determine an earlier EVR.Furthermore there are a few known HCV mutations playing a role in the chronicity of HCV. Lack of treatment response can be caused by other mutations in the HCV genome. Sequencing of the whole HCV genome has not been done very extensively.

Immunology: Proliferation and interferon production by HCV specific CD8 cells is defective. Not very much is known about the HCV-specific CD8 cells responses during treatment with peginterferon and ribavirin. Evidence is gathering that regulatory T-cells (CD4+CD25+) are involved in the process of inhibiting proliferation. Also it is known that the concentration of HCV-specific CD4 and CD8 cells in the liver is higher than in the peripheral blood. Certain homing molecules are probably involved in this process.

Hypothesis:

virologic: 1) at 4 weeks it is possible to determine an EVR; 2) other than the known ,mutations are responsible for the chronicity and unresponsiveness of the HCV virus; 3) whole blood analysis will be able to predict an EVR with more sensitivity than the current HCV-RNA techniques.

immunologic: 1) the specific relation between HCV specific CD4 and CD8 cells will determine if proliferation and production of interferon during therapy with peginterferon and ribavirin is successful. 2) regulatory T cells are inhibiting proliferation and production in chronic HCV infection and the amount of regulatory T cells will diminish during therapy with peginterferon and ribavirin. 3) wich homing molecules are important in the homing of HCV specific CD8 cells to the liver.

• Study Type: Observational
• Enrollment (Actual): 28

Contacts and Locations

Study Locations

• Netherlands
  • Utrecht, Netherlands, 3584 CX
    • University Medical Center Utrecht

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

All patients where the treating physicians decides to start treatment with peginterferon and ribavirin for treatment of hepatitis C

• HCV mono-infection or HCV / HIV coinfection
• Genotype 1
• Compliant for outpatient visits

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Prospective

Collaborators and Investigators

• Sponsor: UMC Utrecht
• Collaborators: Hoffmann-La Roche
• Investigators: Study Director: I. M. Hoepelman, MD, PhD, UMC Utrecht

Publications and helpful links

General Publications

• Arends JE, Boucher CA, Hoepelman AI. Hepatitis C virus and human immunodeficiency virus coinfection: where do we stand? Neth J Med. 2005 May;63(5):156-63.

Study record dates

Study Major Dates

• Study Start: August 1, 2005
• Primary Completion (Actual): September 1, 2008
• Study Completion (Actual): January 1, 2009

Study Registration Dates

• First Submitted: September 6, 2005
• First Submitted That Met QC Criteria: September 6, 2005
• First Posted (Estimate): September 8, 2005

Study Record Updates

• Last Update Posted (Estimate): February 16, 2009
• Last Update Submitted That Met QC Criteria: February 13, 2009
• Last Verified: February 1, 2009

More Information

Terms related to this study

• Keywords: HIV; hepatitis C; virologic; immunologic; HIV / Hepatitis C coinfection
• Additional Relevant MeSH Terms: Digestive System Diseases; RNA Virus Infections; Virus Diseases; Infections; Blood-Borne Infections; Communicable Diseases; Liver Diseases; Flaviviridae Infections; Hepatitis, Viral, Human; Enterovirus Infections; Picornaviridae Infections; Hepatitis; Hepatitis A; Hepatitis C
• Other Study ID Numbers: 04-247E