Memory B Cells that Cross-React with Group 1 and Group 2 Influenza A Viruses Are Abundant in Adult Human Repertoires.

Journal Article (Journal Article)

Human B cell antigen-receptor (BCR) repertoires reflect repeated exposures to evolving influenza viruses; new exposures update the previously generated B cell memory (Bmem) population. Despite structural similarity of hemagglutinins (HAs) from the two groups of influenza A viruses, cross-reacting antibodies (Abs) are uncommon. We analyzed Bmem compartments in three unrelated, adult donors and found frequent cross-group BCRs, both HA-head directed and non-head directed. Members of a clonal lineage from one donor had a BCR structure similar to that of a previously described Ab, encoded by different gene segments. Comparison showed that both Abs contacted the HA receptor-binding site through long heavy-chain third complementarity determining regions. Affinities of the clonal-lineage BCRs for historical influenza-virus HAs from both group 1 and group 2 viruses suggested that serial responses to seasonal influenza exposures had elicited the lineage and driven affinity maturation. We propose that appropriate immunization regimens might elicit a comparably broad response.

Full Text

Duke Authors

Cited Authors

  • McCarthy, KR; Watanabe, A; Kuraoka, M; Do, KT; McGee, CE; Sempowski, GD; Kepler, TB; Schmidt, AG; Kelsoe, G; Harrison, SC

Published Date

  • January 16, 2018

Published In

Volume / Issue

  • 48 / 1

Start / End Page

  • 174 - 184.e9

PubMed ID

  • 29343437

Pubmed Central ID

  • PMC5810956

Electronic International Standard Serial Number (EISSN)

  • 1097-4180

Digital Object Identifier (DOI)

  • 10.1016/j.immuni.2017.12.009


  • eng

Conference Location

  • United States