期刊
EUROPEAN JOURNAL OF IMMUNOLOGY
卷 40, 期 4, 页码 936-939出版社
WILEY-BLACKWELL
DOI: 10.1002/eji.201040466
关键词
Bystander activation; Interferon; IL-2; IL-15; Memory
类别
Bystander activation of T cells, i.e. the stimulation of unrelated (heterologous) T cells by cytokines during an Ag-specific T-cell response, has been best described for CD8(+) T cells. In the CD8(+) compartment, the release of IFN and IFN-inducers leads to the production of IL-15, which mediates the proliferation of CD8(+) T cells, notably memory-phenotype CD8(+) T cells. CD4(+) T cells also undergo bystander activation, however, the signals inducing this Ag-nonspecific stimulation of CD4(+) T cells are less well known. A study in this issue of the European Journal of Immunology sheds light on this aspect, suggesting that common gamma-chain cytokines including IL-2 might be involved in bystander activation of CD4(+) T cells.
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