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《Chinese Journal of Anatomy》 2016-05
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Effect of obstructive sleep apnea hypoxia on autophagy of the hippocampal neurons after cerebral ischemia in rats

Guo Xiangfei;Zhao Yaning;Li Jianmin;Chen Changxiang;Li Shuxing;College of Nursing and Rehabilitation,North China University of Science and Technology;Affiliated Hospital,North China University of Science and Technology;  
Objective:To investigate the effects of obstructive sleep apnea hypoxia(OSAH) on autophagy of the hippocampal neurons in rats with ischemia.Methods:Healthy male Wistar rats were randomly divided into sham operation group C SO group),ischemia/reperfusion group(I/R group),OSAH hypoxia for 7 days before ischemia/reperfusion group(IH7 + I/R group) and OSAH hypoxia for 21 days before ischemia/reperfusion group(IH21 + I/R group).Cerebral ischemia-reperfusion animals were prepared by improved Pulsinelli four vessel block(4-VO) for 24 hours.The morphological changes of hippocampal neurons were detected with H-E staining,and the expression of mTOR and beclin-1 in the hippocampus was detected by immunohistochemistry and RT-PCR Results:Compared with the SO group,the I/R group showed damages of hippocampal neurons;immunohistochemistry analysis showed that the number of mTOR and beclin-1 postive cells increased;RT-PCR analysis showed that the expressios of mTOR and beclin-1 were increased.Compared with the I/R group,OSAH hypoxia ischemia groups exacerbated the damage of hippocampal neurons;immunohistochemistry analysis showed that the number of mTOR and beclin-1 postive cells was increased;RT-PCR showed that the expressions of mTOR and beclin-1 were increased at IH7 +I/R group.The above changes were more apparent in the IH21 + I/R group.Conclusion:OSAH hypoxia exacerbates autophagic damages in the hippocampus after ischemia in rats.
【Fund】: 唐山市科技计划项目(14130220B);; 河北省高等学校科学技术研究项目(ZD20131007)
【CateGory Index】: R766;R743
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【Co-citations】
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