The Neuroprotective Effect of Losartan through Inhibiting AT1/ASK1/MKK4/JNK3 Pathway Following Cerebral I/R in Rat Hippocampal CA1 Region

作者: Tian-Ling Zhang , Jian-Liang Fu , Zhi Geng , Jia-Jun Yang , Xiao-Jiang Sun

DOI: 10.1111/CNS.12015

关键词: EndocrinologyAngiotensin II receptor type 1ReceptorNeuroprotectionASK1Internal medicineAngiotensin IIProtein kinase AMitogen-activated protein kinaseChemistryLosartan

摘要: Summary Aims It has been well documented that angiotensin II type 1 (AT1) receptor blockers (ARBs) are known to attenuate neural damage and the c-Jun N-terminal protein kinase 3 (JNK3) pathway caspase-3 signal involved in neuronal cell death following cerebral ischemia/reperfusion (I/R). In this study, we first showed losartan could protect neurons against I/R-induced injury. Methods Cerebral ischemia model was induced by four-vessel occlusion. Antisense oligodeoxynucleotides (ODNs) AT1 were used detect whether implicated I/R. Immunoprecipitation (IP) immunoblotting (IB) interactions between β-arrestin-2 AT1/apoptosis signal-regulating (ASK1)/MAP 4 (MKK4) signaling module I/R. Results First, decreased death. Second, depressed β-arrestin-2-assembled AT1/ASK1/MKK4 module. Third, activation of c-jun, JNK3, Bcl-2, release cytochrome c from mitochondria cytoplasm. Conclusion Taken together, I/R via inhibiting depressing c.

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