CXCL1 promotes arteriogenesis through enhanced monocyte recruitment into the peri-collateral space
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  • 作者:Mark H. M. Vries ; Allard Wagenaar ; Sanne E. L. Verbruggen…
  • 关键词:Peripheral vascular disease ; Arteriogenesis ; Chemokines ; Endothelial cells ; Monocytes
  • 刊名:Angiogenesis
  • 出版年:2015
  • 出版时间:April 2015
  • 年:2015
  • 卷:18
  • 期:2
  • 页码:163-171
  • 全文大小:770 KB
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文摘
Aims The mechanisms of monocyte recruitment to arteriogenic collaterals are largely unknown. We investigated the role of chemokine (C-X-C-motif) ligand 1 (CXCL1) and its cognate receptor, chemokine (C-X-C-motif) receptor 2 (CXCR2) in arteriogenesis. Methods and results After femoral artery ligation in Sprague–Dawley rats, either native collaterals were harvested or placebo, CXCL1 or CXCR2 blocker was administered via an osmopump. Perfusion recovery was measured with Laser Doppler, leukocyte populations were analyzed by fluorescence-activated cell sorting, and hind limb sections were stained for macrophage marker cluster of differentiation 68 (CD68). In vitro, fluorescent CXCL1 or human acute monocytic leukemia cell line (THP-1) monocytic cells were flown over shear-stressed endothelium. CXCL1 mRNA expression in collaterals was dramatically upregulated already 1?h after ligation (ratio ligated/sham 5.73). CD68 mRNA was upregulated from 12?h until 3?days after ligation (peak ratio ligated/sham 2.65). CXCL1 treatment augmented perfusion recovery at 3 and 7?days (p?p?p?=?0.01) and also significantly reduced the number of peri-collateral macrophages (p?p?p? Conclusion CXCL1 presented on the luminal endothelial surface leads to an increase in the number of peri-collateral macrophages, thus improving the arteriogenic response after arterial ligation.

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