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Presentation of high antigen‐dose by splenic B220 lo B cells fosters a feedback loop between T helper type 2 memory and antibody isotype switching
Author(s) -
Ellis Jason S.,
Guloglu F. Betul,
Zaghouani Habib
Publication year - 2016
Publication title -
immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.297
H-Index - 133
eISSN - 1365-2567
pISSN - 0019-2805
DOI - 10.1111/imm.12579
Subject(s) - isotype , loop (graph theory) , antigen , antibody , immunoglobulin class switching , immunology , biology , microbiology and biotechnology , physics , b cell , mathematics , combinatorics , monoclonal antibody
Summary Effective humoral immunity ensues when antigen presentation by B cells culminates in productive cooperation with T lymphocytes. This collaboration, however, remains ill‐defined because naive antigen‐specific B cells are rare and difficult to track in vivo . Herein, we used a defined transfer model to examine how B lymphocytes, as antigen‐presenting cells, shape the development of T‐cell memory suitable for generation of relevant antibody responses. Specifically, we examined how B cells presenting different doses of antigen during the initial priming phase shape the development of CD 4 T‐cell memory and its influence on humoral immunity. The findings indicate that B cells presenting low dose of antigen favour the development of T helper type 1 (Th1) type memory, while those presenting a high antigen dose yielded better Th2 memory cells. The memory Th2 cells supported the production of antibodies by effector B cells and promoted isotype switching to IgG1. Moreover, among the B‐cell subsets tested for induction of Th2 memory, the splenic but not peritoneal B220 lo cells were most effective in sustaining Th2 memory development as well as immunoglobulin isotype switching, and this function involved a tight control by programmed death 1–programmed death ligand 2 interactions.