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IJEB Vol.45(08) [August 2007] >


Title: Factors affecting the presentation of exogenous Hepatitis B virus core antigen
Authors: Devasahayam, Mercy
Keywords: Hela
Hepatitis B virus
MHC
TAP
Virosomes
Issue Date: Aug-2007
Publisher: CSIR
Abstract: Hepatitis B virus core antigen (HBcAg) plays a critical role in terminating acute Hepatitis B virus infection and may be used as a potential vaccine candidate. The cell surface major histocompatibility complex (MHC) class 1 molecules are thought to be involved in the presentation of HBcAg. Surface MHC class 1 HLA A2 heavy chain (HC) and trimeric molecules were characterized on transfected Hela cells used as antigen presenting cells (APC) for the presentation of HBcAg. The results show that antibodies against HC HLA A2 and trimeric HLA-A2 molecules resulted in increased activation of HBcAg 18-27 minimal peptide specific cytotoxic T lymphocytes (CTLs), while the addition of exogenous 2-microglobulin decreased the activation of HBcAg specific CTLs. Further, specific CD8+ T cells were activated only when Hela cells as APCs were primed with HBcAg (peptide, soluble or embedded on virosomes) at pH 6.5.
Page(s): 689-695
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Source:IJEB Vol.45(08) [August 2007]

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