Molecular imprint of exposure to naturally occurring genetic variants of human cytomegalovirus on the T cell repertoire

Corey Smith, Stephanie Gras, Rebekah M Brennan, Nicola L Bird, Sophie A Valkenburg, Kelly-Anne Twist, Jacqueline M Burrows, John J Miles, Daniel Charles Chambers, Scott C Bell, Scott B Campbell, Katherine Kedzierska, Scott R Burrows, Jamie Rossjohn, Rajiv Khanna

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11 Citations (Scopus)

Abstract

Exposure to naturally occurring variants of herpesviruses in clinical settings can have a dramatic impact on anti-viral immunity. Here we have evaluated the molecular imprint of variant peptide-MHC complexes on the T-cell repertoire during human cytomegalovirus (CMV) infection and demonstrate that primary co-infection with genetic variants of CMV was coincident with development of strain-specific T-cell immunity followed by emergence of cross-reactive virus-specific T-cells. Cross-reactive CMV-specific T cells exhibited a highly conserved public T cell repertoire, while T cells directed towards specific genetic variants displayed oligoclonal repertoires, unique to each individual. T cell recognition foot-print and pMHC-I structural analyses revealed that the cross-reactive T cells accommodate alterations in the pMHC complex with a broader foot-print focussing on the core of the peptide epitope. These findings provide novel molecular insight into how infection with naturally occurring genetic variants of persistent human herpesviruses imprints on the evolution of the anti-viral T-cell repertoire.
Original languageEnglish
Article number3993
Number of pages10
JournalScientific Reports
Volume4
DOIs
Publication statusPublished - 2014

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