| First Author | Izumi Y | Year | 2005 |
| Journal | Arterioscler Thromb Vasc Biol | Volume | 25 |
| Issue | 9 | Pages | 1877-83 |
| PubMed ID | 15976330 | Mgi Jnum | J:108708 |
| Mgi Id | MGI:3624579 | Doi | 10.1161/01.ATV.0000174801.76234.bd |
| Citation | Izumi Y, et al. (2005) Important role of apoptosis signal-regulating kinase 1 in ischemia-induced angiogenesis. Arterioscler Thromb Vasc Biol 25(9):1877-83 |
| abstractText | OBJECTIVE: We first examined the role of apoptosis signal-regulating kinase 1 (ASK1), one of mitogen-activated protein kinase kinase kinases, in ischemia-induced angiogenesis. METHODS AND RESULTS: Unilateral hindlimb ischemia was induced surgically in C57BL/6J wild-type (WT) mice or mice deficient in ASK1 (ASK1(-/-)). ASK1 activity in WT mouse hindlimb was increased dramatically after ischemia. By laser Doppler analysis, well-developed collateral vessels and angiogenesis were observed in WT mice in response to hindlimb ischemia, whereas these responses were reduced in ASK1(-/-) mice. Immunostaining revealed that infiltration of macrophages and T lymphocytes was suppressed in the ischemic tissues of ASK1(-/-) mice compared with WT mice. The expression of vascular endothelial growth factor (VEGF) and monocyte chemoattractant protein-1 (MCP-1) proteins in ischemic tissues was weaker in ASK1(-/-) mice compared with WT mice. In vitro study on endothelial cells indicated that dominant-negative ASK1 significantly attenuated hydrogen peroxide-induced VEGF and MCP-1 production. Furthermore, in vivo blockade of MCP-1 by its neutralizing antibody suppressed the recovery of the blood flow and capillary formation after ischemia. CONCLUSIONS: ASK1 pathway promotes early angiogenesis by inducing inflammatory cell infiltration and VEGF and MCP-1 expression. ASK1 may provide the basis for the development of new therapeutic strategy for angiogenesis. |
