Overexpression of HSPA12B protects against cerebral ischemia/reperfusion injury via a PI3K/Akt-dependent mechanism
Overexpression of HSPA12B protects against cerebral ischemia/reperfusion injury via a PI3K/Akt-dependent mechanism
复制标题
HSPA12B 的过度表达通过 PI3K/Akt 依赖性机制防止脑缺血/再灌注损伤。
DOI：
10.1016/j.bbadis.2012.10.003
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发表时间：
2013-01-01
影响因子：
6.2
通讯作者：
Liu, Li
中科院分区：
文献类型：
--
作者：
Ma, Yujie;Lu, Chen;Liu, Li
Background and purpose: HSPA12B is a newly discovered member of the Hsp70 family proteins. This study investigated the effects of HSPA12B on focal cerebral ischemia/reperfusion (UR) injury in mice. Methods: Transgenic mice overexpressing human HSPA12B (Tg) and wild-type littermates (WT) were subjected to 60 mm of middle cerebral artery occlusion to induce ischemia and followed by reperfusion (I/R). Neurological deficits, infarct volumes and neuronal death were examined at 6 and 24 hrs after reperfusion. Blood-brain-barrier (BBB) integrity and activated cellular signaling were examined at 3 hrs after reperfusion. Results: After cerebral I/R, Tg mice exhibited improvement in neurological deficits and decrease in infarct volumes, when compared with WT I/R mice. BBB integrity was significantly preserved in Tg mice following cerebral I/R Tg mice also showed significant decreases in cell injury and apoptosis in the ischemic hemispheres. We observed that overexpression of HSPA12B activated PI3K/Akt signaling and suppressed JNK and p38 activation following cerebral I. Importantly, pharmacological inhibition of PI3K/Alct signaling abrogated the protection against cerebral I/R injury in Tg mice. Conclusions: The results demonstrate that HSPA12B protects the brains from focal cerebral I/R injury. The protective effect of HSPA12B is mediated though a PI3K/Akt-dependent mechanism. Our results suggest that HSPA12B may have a therapeutic potential against ischemic stroke. (C) 2012 Elsevier B.V. All rights reserved.
