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Ameres, S. ; Besold, K.* ; Plachter, B.* ; Moosmann, A.

CD8 T cell-evasive functions of human cytomegalovirus display pervasive MHC allele specificity, complementarity, and cooperativity.

J. Immunol. 192, 5894-5905 (2014)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
Immunoevasive proteins ("evasins") of human CMV (HCMV) modulate stability and localization of MHC class I (MHC I) molecules, and their supply of antigenic peptides. However, it is largely unknown to what extent these evasins interfere with recognition by virus-specific CD8 T cells. We analyzed the recognition of HCMV-infected cells by a panel of CD8 T cells restricted through one of nine different MHC I allotypes. We employed a set of HCMV mutants deleted for three or all four of the MHC I modulatory genes US2, US3, US6, and US11. We found that different HCMV evasins exhibited different allotype-specific patterns of interference with CD8 T cell recognition of infected cells. In contrast, recognition of different epitopes presented by the same given MHC I allotype was uniformly reduced. For some allotypes, single evasins largely abolished T cell recognition; for others, a concerted action of evasins was required to abrogate recognition. In infected cells whose Ag presentation efficiency had been enhanced by IFN-γ pretreatment, HCMV evasins cooperatively impared T cell recognition for several different MHC I allotypes. T cell recognition and MHC I surface expression under influence of evasins were only partially congruent, underscoring the necessity to probe HCMV immunomodulation using specific T cells. We conclude that the CD8 T cell evasins of HCMV display MHC I allotype specificity, complementarity, and cooperativity.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Class-i Molecules; Complex Class-i; Epstein-barr-virus; Viral Gene-expression; Immune-evasion; Murine Cytomegalovirus; Antigen Presentation; Heavy-chains; Endoplasmic-reticulum; Peptide Translocation
ISSN (print) / ISBN 0022-1767
e-ISSN 1550-6606
Journal Journal of Immunology
Quellenangaben Volume: 192, Issue: 12, Pages: 5894-5905 Article Number: , Supplement: ,
Publisher American Association of Immunologists
Publishing Place Bethesda
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) CCG Immunooncology (AGV-KIO)
Research Unit Gene Vector (AGV)