Sustained virological response to peginterferon plus ribavirin in chronic hepatitis C genotype 1 patients is associated with a persistent Th1 immune response.

Abstract:

BACKGROUND:An impairment of cellular immune response may contribute to the persistency of hepatitis C virus infection. AIM:To analyse the Th1/Th2 cytokine profile in peripheral blood CD4(+) and CD8(+) T cells from patients with chronic hepatitis C (CHC) during treatment with pegylated interferon-alpha2a plus ribavirin and to correlate the Th1/Th2 balance with virological response (SVR). METHODS:Prospective longitudinal study: 44 naïve genotype 1 CHC patients received PEG-IFNalpha2a plus ribavirin for 48 weeks: 26 (59.1%) achieved a SVR, 13 relapsed (29.5%) and 5 (11.4%) were non-responders. Sixteen healthy controls were analysed. The production of IL-4, IFNgamma and TNFalpha by CD4(+) and CD8(+) T cells was measured using flow cytometry, both in resting and phorbol-ester-stimulated cells. RESULTS:First three months of treatment: the synthesis of TNFalpha by phorbol-ester-stimulated-CD4(+) T cells was higher in patients with SVR (P < 0.01). At the end of treatment, SVR was associated with higher intracellular expression of IFNgamma by stimulated-CD4(+) and CD8(+) T cells (P < 0.05). At the end of follow-up, a higher intracellular expression of IFNgamma by CD4(+) T cells was associated with a SVR. CONCLUSIONS:A Th1-type immune response was associated with achievement of a SVR, as indicated by the persistent elevation of intracellular IFNgamma and TNFalpha.

journal_name

Aliment Pharmacol Ther

authors

Trapero-Marugán M,García-Buey L,Muñoz C,Quintana NE,Moreno-Monteagudo JA,Borque MJ,Fernández MJ,Salvanés FR,Medina J,Moreno-Otero R

doi

10.1111/j.1365-2036.2006.02954.x

subject

Has Abstract

pub_date

2006-07-01 00:00:00

pages

117-28

issue

1

eissn

0269-2813

issn

1365-2036

pii

APT2954

journal_volume

24

pub_type

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