Coregulation of vascular tube stabilization by endothelial cell TIMP-2 and pericyte TIMP-3.

Coregulation of vascular tube stabilization by endothelial cell TIMP-2 and pericyte TIMP-3.
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DOI:
10.1083/jcb.200603176
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发表时间:
2006-10-09
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Davis GE
Davis GE
中科院分区:
其他
文献类型:
--
作者:
Saunders WB;Bohnsack BL;Faske JB;Anthis NJ;Bayless KJ;Hirschi KK;Davis GE

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内皮细胞(EC)来源的组织金属蛋白酶-2 (TIMP-2)和周细胞来源的TIMP-3被证明通过阻断EC管在三维胶原基质中的形态发生和回归的联合能力,共同调节EC -周细胞相互作用后的人毛细血管稳定性。ec -周细胞相互作用强烈诱导周细胞表达TIMP-3,而ec -周细胞共培养产生TIMP-2。利用小干扰RNA技术,抑制EC TIMP-2和周细胞TIMP-3的表达导致这些共培养细胞以基质金属蛋白酶-1 (MMP-1) -、MMP-10 -和ADAM-15(一种崩解素和金属蛋白酶-15)依赖的方式出现毛细血管消退。此外,我们发现EC管的形态发生(管腔形成和侵袭)主要由TIMP-2和-3靶膜型(MT) 1 MMP控制。这些抑制剂的其他靶点包括MT2-MMP和ADAM-15,它们也调节EC的侵袭。诱变实验表明TIMP-3需要其蛋白酶抑制功能来诱导试管稳定。总的来说,这些数据揭示了TIMP-2和-3在周细胞诱导的新形成的血管网络稳定化中的新作用,这些血管网络倾向于经历回归,并揭示了调节这些事件的抑制剂的特定分子靶点。
The endothelial cell (EC)–derived tissue inhibitor of metalloproteinase-2 (TIMP-2) and pericyte-derived TIMP-3 are shown to coregulate human capillary tube stabilization following EC–pericyte interactions through a combined ability to block EC tube morphogenesis and regression in three-dimensional collagen matrices. EC–pericyte interactions strongly induce TIMP-3 expression by pericytes, whereas ECs produce TIMP-2 in EC–pericyte cocultures. Using small interfering RNA technology, the suppression of EC TIMP-2 and pericyte TIMP-3 expression leads to capillary tube regression in these cocultures in a matrix metalloproteinase-1 (MMP-1)–, MMP-10–, and ADAM-15 (a disintegrin and metalloproteinase-15)–dependent manner. Furthermore, we show that EC tube morphogenesis (lumen formation and invasion) is primarily controlled by the TIMP-2 and -3 target membrane type (MT) 1 MMP. Additional targets of these inhibitors include MT2-MMP and ADAM-15, which also regulate EC invasion. Mutagenesis experiments reveal that TIMP-3 requires its proteinase inhibitory function to induce tube stabilization. Overall, these data reveal a novel role for both TIMP-2 and -3 in the pericyte-induced stabilization of newly formed vascular networks that are predisposed to undergo regression and reveal specific molecular targets of the inhibitors regulating these events.
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