Effects of Zhuyu Annao on Hippocampal Neuronal Apoptosis and Cognitive Disorder in a Rat Model of Ischemic Brain Injury

Abstract

IntroductionWe aimed to determine the effects of Zhuyu Annao (ZYAN) prescription on hippocampal neuronal apoptosis and cognitive disorder (CD) in ischemic brain injury (IBI).Material and methodsThe improved Rice-Vannucci method was used to prepare a rat model of IBI. Rats in the ZYAN prescription group were intragastrically administered 12.50 g/kg of ZYAN prescription 4 h after modeling; rats in the mock surgical group (MSG) and model group (MG) were administered an intraperitoneal injection of the same volume of normal saline twice daily.ResultsCompared with MG, the area of cerebral infarction, pathological changes, neuron apoptosis index, and neurodeficit score were significantly reduced in the ZYAN prescription group (P < 0.05). Morris water maze test showed that in the ZYAN prescription group, incubation period was significantly shortened and the number of platform crossings was significantly increased (P < 0.05). Furthermore, the rats in the ZYAN prescription group showed significantly reduced protein and mRNA expressions of cleaved caspase-3, Bax, p-53, and p38 mitogen-activated protein kinase (MAPK) in the hippocampus, whereas the protein and mRNA expressions of Bcl-2 were significantly increased (P < 0.05).ConclusionsZYAN prescription reduced the area of cerebral infarction, attenuated neuronal apoptosis, and alleviated CD in the rats with IBI. The beneficial effect of ZYAN prescription in IBI may be mediated via the inhibition of the p38 MAPK signaling pathway and caspase-3 cascade reaction.