Recruitment of the inflammatory subset of monocytes to sites of ischemia induces angiogenesis in a monocyte chemoattractant protein-1-dependent fashion

被引:81
作者
Capoccia, Benjamin J. [1 ]
Gregory, Alyssa D. [1 ]
Link, Daniel C. [1 ]
机构
[1] Washington Univ, Sch Med, Div Oncol, St Louis, MO 63110 USA
基金
美国国家卫生研究院;
关键词
MCP-1; CCR2;
D O I
10.1189/jlb.1107756
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
There is accumulating evidence that delivery of bone marrow cells to sites of ischemia by direct local injection or mobilization into the blood can stimulate angiogenesis. This has stimulated tremendous interest in the translational potential of angiogenic cell population(s) in the bone marrow to mediate therapeutic angiogenesis. However, the mechanisms by which these cells stimulate angiogenesis are unclear. Herein, we show that the inflammatory subset of monocytes is selectively mobilized into blood after surgical induction of hindlimb ischemia in mice and is selectively recruited to ischemic muscle. Adoptive-transfer studies show that delivery of a small number of inflammatory monocytes early (within 48 h) of induction of ischemia results in a marked increase in the local production of MCP-1, which in turn, is associated with a secondary, more robust wave of monocyte recruitment. Studies of mice genetically deficient in MCP-1 or CCR2 indicate that although not required for the early recruitment of monocytes, the secondary wave of monocyte recruitment and subsequent stimulation of angiogenesis are dependent on CCR2 signaling. Collectively, these data suggest a novel role for MCP-1 in the inflammatory, angiogenic response to ischemia.
引用
收藏
页码:760 / 768
页数:9
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