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CD8 + T-cell responses towards conserved influenza B virus epitopes across anatomical sites and age.

Tejas MenonPatricia T IllingPriyanka ChaurasiaHayley A McQuiltenChloe ShepherdLouise C RowntreeJan PetersenDene R LittlerGrace KhuuZiyi HuangLilith F AllenSteve RockmanJane CroweKatie Louise FlanaganLinda M WakimThi H O NguyenNicole A MifsudJamie RossjohnAnthony Wayne PurcellCarolien E van de SandtKatherine Kedzierska
Published in: Nature communications (2024)
Influenza B viruses (IBVs) cause substantive morbidity and mortality, and yet immunity towards IBVs remains understudied. CD8 + T-cells provide broadly cross-reactive immunity and alleviate disease severity by recognizing conserved epitopes. Despite the IBV burden, only 18 IBV-specific T-cell epitopes restricted by 5 HLAs have been identified currently. A broader array of conserved IBV T-cell epitopes is needed to develop effective cross-reactive T-cell based IBV vaccines. Here we identify 9 highly conserved IBV CD8 + T-cell epitopes restricted to HLA-B*07:02, HLA-B*08:01 and HLA-B*35:01. Memory IBV-specific tetramer + CD8 + T-cells are present within blood and tissues. Frequencies of IBV-specific CD8 + T-cells decline with age, but maintain a central memory phenotype. HLA-B*07:02 and HLA-B*08:01-restricted NP 30-38 epitope-specific T-cells have distinct T-cell receptor repertoires. We provide structural basis for the IBV HLA-B*07:02-restricted NS1 196-206 (11-mer) and HLA-B*07:02-restricted NP 30-38 epitope presentation. Our study increases the number of IBV CD8 + T-cell epitopes, and defines IBV-specific CD8 + T-cells at cellular and molecular levels, across tissues and age.
Keyphrases
  • transcription factor
  • high resolution
  • risk factors
  • high throughput
  • single cell
  • binding protein