Local macrophage proliferation, rather than recruitment from the blood, is a signature of TH2 inflammation.

Local macrophage proliferation, rather than recruitment from the blood, is a signature of TH2 inflammation.
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DOI:
10.1126/science.1204351
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发表时间:
2011-06-10
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Allen JE
Allen JE
中科院分区:
其他
文献类型:
--
作者:
Jenkins SJ;Ruckerl D;Cook PC;Jones LH;Finkelman FD;van Rooijen N;MacDonald AS;Allen JE

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A defining feature of inflammation is the accumulation of innate immune cells in the tissue that are thought to be recruited from the blood. We reveal that a distinct process exists in which tissue macrophages undergo rapid in situ proliferation in order to increase population density. This inflammatory mechanism occurred during T helper 2 (Th2)-related pathologies under the control of the archetypal Th2 cytokine interleukin-4 (IL-4), and was a fundamental component of Th2 inflammation because exogenous IL-4 was sufficient to drive accumulation of tissue macrophages through self-renewal. Thus, expansion of innate cells necessary for pathogen control or wound repair can occur without recruitment of potentially tissue-destructive inflammatory cells.
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