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1 As noted earlier, pericytes represent a specialized mesenchymal cell type (related to smooth muscle cells) with finger-like projections that wrap around the endothelial tubing of blood vessels. In normal tissues, pericytes are known to provide paracrine support signals to the normally quiescent endothelium. 2 For example, Ang-1 secreted by pericytes conveys antiproliferative stabilizing signals that are received by the Tie2 receptors expressed on the surface of endothelial cells; some pericytes also produce low levels of VEGF that serve a trophic function in endothelial homeostasis. Pericytes also collaborate with the endothelial cells to synthesize the vascular basement membrane that anchors both pericytes and endothelial cells and helps vessel walls to withstand the hydrostatic pressure of blood flow. |
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sltmac: ½ð±Ò+1 2013-01-19 08:46:30
yin198716: ½ð±Ò+2, ·ÒëEPI+1, ¡ïÓаïÖú 2013-01-21 14:09:33
sltmac: ½ð±Ò+1 2013-01-19 08:46:30
yin198716: ½ð±Ò+2, ·ÒëEPI+1, ¡ïÓаïÖú 2013-01-21 14:09:33
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