Low CD21 expression defines a population of recent germinal center graduates primed for plasma cell differentiation

Denise Lau, Linda Yu Ling Lan, Sarah F. Andrews, Carole Henry, Karla Thatcher Rojas, Karlynn E. Neu, Min Huang, Yunping Huang, Brandon DeKosky, Anna Karin E. Palm, Gregory C. Ippolito, George Georgiou, Patrick C. Wilson

Research output: Contribution to journalArticle

68 Scopus citations

Abstract

In this study, we report that antigen-specific CD19+CD27+CD21lo (CD21lo) B cells are transiently induced 14 to 28 days after immunization, at the time germinal centers (GCs) peak. Although clonally related to memory B cells and plasmablasts, CD21lo cells form distinct clades within phylogenetic trees based on accumulated variable gene mutations, supporting exit from active GCs. CD21lo cells express a transcriptional program, suggesting that they are primed for plasma cell differentiation and are refractory to GC differentiation, although they do not spontaneously secrete antibody. In addition, CD21lo cells differentially express multiple cell surface markers and have elevated intracellular levels of Blimp-1 and T-bet protein compared with memory B cells. Together, these data support a model in which CD21lo cells are recent GC graduates that represent a distinct population from CD27+ classical memory cells, are refractory to GC reentry, and are predisposed to differentiate into long-lived plasma cells.

Original languageEnglish (US)
Article numbereaai8153
JournalScience Immunology
Volume2
Issue number7
DOIs
StatePublished - 2017

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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