CYTOKINE RESPONSE ASSOCIATED WITH HEPATITIS C VIRUS CLEARANCE IN HIV COINFECTED PATIENTS INITIATING PEG INTERFERON-? BASED THERAPY.
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.
Accepted: November 9, 2015
Authors
Background: Treatment against hepatitis C virus (HCV) infection based on peginterferon-a (pegIFNa) and ribavirin induces important changes on cytokine release and T cell activation.
Objective: Immune response to pegIFNa-ribavirin therapy was explored in patients coinfected by HCV and HIV.
Methods: Concentrations of 25 cytokines and CD8+ T cell activation were monitored in HCV/HIV coinfected patients classified as sustained virological responders (SVR, n=19) and non-responders (NR, n=11).
Results: High pretreatment concentrations of IP-10 (CXCL-10) and MCP-1 (CCL-2) were associated with poor anti-HCV response. PegIFNa-ribavirin therapy increased CD8+ T cell activation and induced significant changes in levels of eleven cytokines related to both Th1 and Th2 responses in SVR (IL-1b, IL-1RA, IL-4, IL-5, IL-6, IL-7, IL-12p40/70, IL-13, IP-10, eotaxin, MCP-1) but only six cytokines in NR (IL-1b, IL-2, IL-5, IL-12p40/70, IL-13, eotaxin). Highest rise in MIP-1b and MCP-1 levels was observed four weeks after anti-HCV treatment initiation in SVR compared to NR (p=0.002 and p=0.03, respectively), whereas a decrease of IL-8 concentration was associated with treatment failure (p= 0.052).
Conclusions: Higher and broader cytokine responses to pegIFNa-ribavirin therapy were observed in SVR patients compared to NR. Changes in IL-8, MIP-1b and MCP-1 serum concentrations may be associated with efficacy of pegIFNa- and ribavirin-based therapies in patients coinfected by HCV and HIV.






