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. 2015 Jun;73(4):ftv022.
doi: 10.1093/femspd/ftv022. Epub 2015 Apr 9.

F protein increases CD4+CD25+ T cell population in patients with chronic hepatitis C

Tayebeh Hashempour  1 , Taravat Bamdad  2 , Alberto Bergamini  3 , Jean Pierre Lavergne  4 , Arghavan Haj-Sheykholeslami  5 , Léa Brakier-Gingras  6 , Mehdi Ajorloo  5 , Shahin Merat  5
Affiliations

F protein increases CD4+CD25+ T cell population in patients with chronic hepatitis C

Tayebeh Hashempour et al. Pathog Dis. 2015 Jun.

Abstract

HCV is a global health problem with an estimated 230 million chronically infected people worldwide. It has been reported that a 17-kd protein translated from core-encoding genomic region can contribute to immune-mediated mechanisms associated with the development of the chronic disease. Also, Treg cells can be contributed to an inadequate response against the viruses, leading to chronic infection. Here we evaluated the ability of protein F to modulate the frequency of CD4+CD25+FoxP3+T and IL-10+T cells in patients with chronic HCV infection. F gene was amplified and cloned in the expression vector. The protein was purified and used for stimulation of PBMCs in the HCV chronic patients and the control groups. The frequency of CD4+CD25+FoxP3+ T cell-like populations and IL-10-producing CD4+CD25+ T cells was assessed in the HCV-infected patients and in the healthy controls by flow cytometry, which showed an increase of both CD4+CD25+FoxP3+ T cell-like population and IL-10-producing CD4+CD25+ T cells in the HCV-infected patients positive for anti-F antibody. Our results suggest the potential involvement of F and core antigens in increasing the frequency of CD4+CD25+FoxP3+ T cell-like population and IL-10-producing CD4+CD25+ T cells which may be associated with HCV-persistent infection.

Keywords: F protein; chronic phase; core protein; hepatitis C virus; regulatory T cells.

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