期刊
JOURNAL OF EXPERIMENTAL MEDICINE
卷 204, 期 6, 页码 1463-1474出版社
ROCKEFELLER UNIV PRESS
DOI: 10.1084/jem.20062602
关键词
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资金
- NIGMS NIH HHS [T32GM-08431, R37GM-40586, R01 GM046354, R37 GM040586, R01GM-62041, R01GM-46354] Funding Source: Medline
Polymicrobial sepsis alters the adaptive immune response and induces T cell suppression and Th2 immune polarization. We identify a GR-1(+) CD11b(+) population whose numbers dramatically increase and remain elevated in the spleen, lymph nodes, and bone marrow during polymicrobial sepsis. Phenotypically, these cells are heterogeneous, immature, predominantly myeloid progenitors that express interleukin 10 and several other cytokines and chemokines. Splenic GR-1(+) cells effectively suppress antigen-specific CD8(+) T cell interferon (IFN) gamma production but only modestly suppress antigen-specific and nonspecific CD4(+) T cell proliferation. GR-1(+) cell depletion in vivo prevents both the sepsis-induced augmentation of Th2 cell - dependent and depression of Th1 cell - dependent antibody production. Signaling through MyD88, but not Toll-like receptor 4, TIR domain - containing adaptor-inducing IFN-gamma, or the IFN-alpha/beta. receptor, is required for complete GR-1(+)CD11b(+) expansion. GR-1(+)CD11b(+) cells contribute to sepsis-induced T cell suppression and preferential Th2 polarization.
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