声波刺猬(Shh)通过介导核受体 NR2F2 调节缺氧葡萄糖剥夺星形胶质细胞中血管生成生长因子的表达。
Sonic hedgehog (Shh) regulates the expression of angiogenic growth factors in oxygen-glucose-deprived astrocytes by mediating the nuclear receptor NR2F2.
机构信息
Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
出版信息
Mol Neurobiol. 2013 Jun;47(3):967-75. doi: 10.1007/s12035-013-8395-9. Epub 2013 Feb 3.
Sonic hedgehog (Shh) has been found to regulate the angiogenic growth factor such as VEGF, Ang-1, and Ang-2 during ischemic insults, but the underlying mechanism is not fully understood. In this study, we employed oxygen-glucose deprivation (OGD) in astrocytes to mimic the ischemia in vitro. We found that OGD could induce the expressions of VEGF, Ang-1, and Ang-2, with the expression of Shh signaling components increased. Moreover, inhibiting the Shh signaling pathway with 5EI, a specific antibody, could decrease the expressions of VEGF, Ang-1, and Ang-2. Furthermore, the administration of exogenous Shh could induce the expressions of VEGF, Ang-1, and Ang-2 in astrocytes. The results of silencing Gli-1, or NR2F2, exhibited that exogenous Shh could regulate the expressions of VEGF, Ang-1, and Ang-2 in astrocytes by activating the NR2F2, but not the Gli-1. These results suggested that Shh could regulate the angiogenic growth factor after ischemic insults in astrocytes, and the regulation was partially mediated by the NR2F2.
sonic 刺猬(Shh)已被发现可调节血管生成生长因子,如 VEGF、Ang-1 和 Ang-2,以应对缺血性损伤,但潜在机制尚未完全阐明。在这项研究中,我们采用氧葡萄糖剥夺(OGD)处理星形胶质细胞,以体外模拟缺血。我们发现,OGD 可诱导 VEGF、Ang-1 和 Ang-2 的表达,同时 Shh 信号通路成分的表达增加。此外,用 5EI(一种特异性抗体)抑制 Shh 信号通路可降低 VEGF、Ang-1 和 Ang-2 的表达。此外,外源性 Shh 可诱导星形胶质细胞中 VEGF、Ang-1 和 Ang-2 的表达。沉默 Gli-1 或 NR2F2 的结果表明,外源性 Shh 可通过激活 NR2F2 而不是 Gli-1 来调节星形胶质细胞中 VEGF、Ang-1 和 Ang-2 的表达。这些结果表明,Shh 可在星形胶质细胞中调节缺血性损伤后的血管生成生长因子,这种调节部分是由 NR2F2 介导的。