Abstract:
:Virus-specific T cells have been shown to cross-react with allogeneic HLA (allo-HLA) at a clonal level. However, the impact of a single virus on the allorepertoire has never been investigated at the polyclonal level. We made an inventory of the incidence and specificity of allo-HLA-cross-reactive-virus-specific CD8+ T cells in 24 healthy individuals. T cells were stained for 25 virus-specific tetramers, and mixed-lymphocyte reactions were performed against a panel of HLA-typed allostimulators. Allospecificity was confirmed by IFNγ-ELISA using T-cell clones against a panel of HLA-typed cell-lines. The polyclonal immune repertoire directed against CMV alone was associated with a memory response against six allo-HLA molecules. Besides, a single allostimulator activated memory T-cell responses with multiple viral specificities. Concluding, a single virus can substantially broaden the allo-HLA memory T-cell repertoire. This study only looked at CMV- and EBV-specific T cells, whereas the immune repertoire consists of T cells directed against many different viruses. Hence, transplant patients receiving an HLA-mismatched graft may already express a polyclonal repertoire of anti-donor-memory T cells before transplantation.
journal_name
Hum Immunoljournal_title
Human immunologyauthors
van den Heuvel H,van der Meer-Prins EMW,van Miert PPMC,Zhang X,Anholts JDH,Claas FHJdoi
10.1016/j.humimm.2018.10.014subject
Has Abstractpub_date
2019-02-01 00:00:00pages
97-102issue
2eissn
0198-8859issn
1879-1166pii
S0198-8859(18)30183-6journal_volume
80pub_type
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