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CD4+ and CD8+ TCR? repertoires possess different potentials to generate extraordinarily high-avidity T cells #MMPMID27030642
Nakatsugawa M; Rahman MA; Yamashita Y; Ochi T; Wnuk P; Tanaka S; Chamoto K; Kagoya Y; Saso K; Guo T; Anczurowski M; Butler MO; Hirano N
Sci Rep 2016[]; 6 (ä): ä PMID27030642show ga
Recent high throughput sequencing analysis has revealed that the TCR? repertoire is largely different between CD8+ and CD4+ T cells. Here, we show that the transduction of SIG35?, the public chain-centric HLA-A*02:01(A2)/MART127?35 TCR? hemichain, conferred A2/MART127?35 reactivity to a substantial subset of both CD8+ and CD4+ T cells regardless of their HLA?A2 positivity. T cells individually reconstituted with SIG35? and different A2/MART127?35 TCR? genes isolated from CD4+ or CD8+ T cells exhibited a wide range of avidity. Surprisingly, approximately half of the A2/MART127?35 TCRs derived from CD4+ T cells, but none from CD8+ T cells, were stained by A2/MART127?35 monomer and possessed broader cross-reactivity. Our results suggest that the differences in the primary structure of peripheral CD4+ and CD8+ TCR? repertoire indeed result in the differences in their ability to form extraordinarily high avidity T cells which would otherwise have been deleted by central tolerance.