PMID: 7538442May 1, 1995Paper

B7-1 and B7-2 do not deliver identical costimulatory signals, since B7-2 but not B7-1 preferentially costimulates the initial production of IL-4

Immunity
G J FreemanL M Nadler

Abstract

The functional necessity for two CD28 counterreceptors (B7-1 and B7-2) is presently unknown. B7-1 and B7-2 equivalently costimulate IL-2 and interferon-gamma (IFN gamma) production and IL-2 receptor alpha and gamma chain expression. B7-2 induces significantly more IL-4 production than B7-1, with the greatest difference seen in naive T cells. Repetitive costimulation of CD4+ CD45RA+ T cells with B7-2 results in moderate levels of both IL-4 and IL-2, whereas repetitive costimulation with B7-1 results in high levels of IL-2 and low levels of IL-4. Therefore, B7-1 and B7-2 costimulation mediate distinct outcomes, since B7-2 provides an initial signal to induce naive T cells to become IL-4 producers, thereby directing the immune response more towards Th0/Th2, whereas B7-1 is a more neutral differentiative signal.

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Citations

Mar 4, 1998·European Journal of Immunology·X M WuT Watanabe
Sep 1, 1996·Cancer Metastasis Reviews·P F Searle, L S Young
Dec 4, 1998·Springer Seminars in Immunopathology·H L Weiner, Y Komagata
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