Study Investigating Immunological Effects of Treatment for Chronic Hepatitis C Patients.

Study Overview
=================
Brief Summary
-----------------
Aim To evaluate the effects of peginterferon and ribavirin therapy on the immune response in chronic HCV genotype 1,2 or 3 patients before, during and after treatment. Background Treatment of chronic hepatitis C (HCV) has shown a remarkable success. However, genotype 1 patients have reduced response rates. A better understanding and improvement of these results can now be considered the greatest challenge. In chronically infected patients, HCV-specific immune responses are generally weak, narrowly focused, and often dysfunctional. The presence of HCV-specific cells suppressing the immune response (regulatory T-lymphocytes=Treg) are able to suppress the immune response. These Treg are possibly responsible for the impaired immune response. Previous studies have indicated increased Treg frequency and activity of immune regulating mechanisms, locally in the liver, as a result of HCV re-infection. Hence, these Data highlight the importance of monitoring intrahepatic immune responses in addition to peripheral immune responses. Using the minimally-invasive technique of fine-needle aspiration biopsy (FNAB), it is now possible to obtain safe and frequent liver samples to monitor local antiviral immune responses in chronic HCV patients during antiviral therapy. Rationale and hypothesis of the study Our previous studies and current literature support the concept that Treg may contribute to HCV persistence by suppressing HCV-spec immune responses. The current study is designed to examine if peginterferon and ribavirin therapy affects the activity of Treg and DC, and if this results in enhanced HCV-specific immune responses. Design Single centre, translational and observational open label study with one arm of 20 genotype 1 patients and one arm of 7 genotype 2/3 patients.

Official Title
-----------------
Impact of Immune Responses in Chronic Hepatitis C Genotype 1,2,3 Virus Infected Patients During Treatment With Pegylated Interferon-alpha-2b and Ribavirin (CIRES).

Conditions
-----------------
Hepatitis C, Liver, Immunology, Regulation

Intervention / Treatment
-----------------
* Procedure: fine-needle aspiration biopsy


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Male and female patients between 18-70 years of age, with evidence of a chronic hepatitis C - Genotype 1,2 or 3 infection. No previous treatment with, peginterferon or conventional interferon plus ribavirin combination therapy. Indication for antiviral therapy of hepatitis C according to current clinical guidelines. Written informed consent. Exclusion Criteria: History or other evidence of severe illness, malignancy or any other condition which would make the patient, in the opinion of the investigators, unsuitable for the study. Presence of contra-indications for antiviral therapy with peginterferon or ribavirin.

Ages Eligible for Study
-----------------
Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| 1<br>Chronic HCV Genotype 1 monoinfection, never had interferon and ribavirin treatment | Procedure: fine-needle aspiration biopsy<br>* aspiration of intrahepatic cells<br>|
| 2<br>Chronic HCV Genotype 2 or 3 monoinfection,never had interferon and ribavirin treatment | Procedure: fine-needle aspiration biopsy<br>* aspiration of intrahepatic cells<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Hepatitis C, Liver, immunology, regulation, Genotype 1,2,3, Treatment, Chronic, Pegylated interferon, Ribavirin