Streitz, Mathias, Noutsias, Michel, Volkmer, Rudolf, Rohde, Maria, Brestrich, Gordon, Block, Andrea, Klippert, Katrin, Kotsch, Katja, Ay, Bernhard, Hummel, Michael, Kuehl, Uwe, Lassner, Dirk, Schultheiss, Heinz-Peter, Volk, Hans-Dieter and Kern, Florian (2008) NS1 Specific CD8(+) T-Cells with Effector Function and TRBV11 Dominance in a Patient with Parvovirus B19 Associated Inflammatory Cardiomyopathy. PLoS ONE, 3 (6). e2361. ISSN 1932-6203

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Abstract

Background: Parvovirus B19 (B19V) is the most commonly detected virus in endomyocardial biopsies (EMBs) from patients with inflammatory cardiomyopathy (DCMi). Despite the importance of T-cells in antiviral defense, little is known about the role of B19V specific T-cells in this entity.

Methodology and Principal Findings: An exceptionally high B19V viral load in EMBs (115,091 viral copies/mg nucleic acids), peripheral blood mononuclear cells (PBMCs) and serum was measured in a DCMi patient at initial presentation, suggesting B19V viremia. The B19V viral load in EMBs had decreased substantially 6 and 12 months afterwards, and was not traceable in PBMCs and the serum at these times. Using pools of overlapping peptides spanning the whole B19V proteome, strong CD8(+) T-cell responses were elicited to the 10-amico-acid peptides SALKLAIYKA (19.7% of all CD8(+) cells) and QSALKLAIYK (10%) and additional weaker responses to GLCPHCINVG (0.71%) and LLHTDFEQVM (0.06%). Real-time RT-PCR of IFN gamma secretion-assay-enriched T-cells responding to the peptides, SALKLAIYKA and GLCPHCINVG, revealed a disproportionately high T-cell receptor Vbeta (TRBV) 11 expression in this population. Furthermore, dominant expression of type-1 (IFN gamma, IL2, IL27 and Tbet) and of cytotoxic T-cell markers (Perforin and Granzyme B) was found, whereas gene expression indicating type-2 (IL4, GATA3) and regulatory T-cells (FoxP3) was low.

Conclusions: Our results indicate that B19V Ag-specific CD8(+) T-cells with effector function are involved in B19V associated DCMi. In particular, a dominant role of TRBV11 and type-1/CTL effector cells in the T-cell mediated antiviral immune response is suggested. The persistence of B19V in the endomyocardium is a likely antigen source for the maintenance of CD8(+) T-cell responses to the identified epitopes.

Item Type:	Article
Schools and Departments:	Brighton and Sussex Medical School > Clinical and Experimental Medicine
Subjects:	Q Science > Q Science (General) Q Science > QH Natural history > QH0301 Biology
Depositing User:	Grecia GarciaGarcia
Date Deposited:	17 Aug 2011 10:43
Last Modified:	16 Mar 2017 09:48
URI:	http://srodev.sussex.ac.uk/id/eprint/7243
Google Scholar:	8 Citations

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