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ID:33125423
大小:15.29 MB
页数:34页
时间:2019-02-20
《ptsd样大鼠海马神经元凋亡与ltp、acp变化的分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、分别取正常及经过sPs,U激后6h、12h、ld、7d、14d各组大鼠依次麻醉手术开颅植入电极,进行电生理记录,进行统计学分析。结果1、流式细胞术检测结果SPS后6h组与对照组相比,凋亡率升高,SPS后12h凋亡率升高,SPS后1d组凋亡率进一步升高,SPS后7d组与SPS后1d组相比,凋亡率下降,SPS后14d组凋亡率进一步降低。2、透射电镜结果SPS后12h组的部分海马神经元出现核固缩,染色质边集并渐出现新月状改变。SPS后ld组部分神经元形成新月形小体,细胞核膜出现明显的皱折,细胞核开始裂解。3、ACP酶组织化学技术结果低倍镜下整个海马呈现AC
2、P阳性反应,以CA3区反应最为明显,高倍镜下ACP的阳性反应产物呈棕褐色的硫化铅颗粒产物均匀分布在细胞质核周部,延伸到突起:SPS后6h组与对照组相比,ACP的阳性表达增强,SPS后12h阳性表达增强,SPS后ld组ACP的阳性表达进一步增强,SPS后7d组与SPS后1d组相比,阳性表达下降,SPS后14d组阳性表达进一步降低。4、ACP酶电镜细胞化学结果电镜下,在正常对照组神经元,胞质内ACP酶阳性反应产物为高电子密度的黑色磷酸铅沉淀可见圆形溶酶体(sphericallysosome,SLY)、高尔基复合体的板层中均有分布,PTSD后6h组吞噬增强
3、,溶酶体有则由圆形变为线条状(NLT);PTSD后1d组吞噬最强,可见线条状溶酶体(Nematolysosome,NLY);PTSD后7d组可见线状和各种形状的溶酶体在胞质中的分布。5、电生理结果高频刺激(highfrequencystimulant,HFS)后,SPS后6h组平均幅值增强率与对照组比较逐渐减小,SPS后12h组更为减小,SPS后ld组时降至最低,SPS3后7d组开始回升,SPS后14d组进一步回升。6、图像分析及统计学分析经SPS刺激后,海马神经元凋亡率SPS后6h组较对照组升高,SPS后12h组进一步升高,SPS后1d组升至最高,
4、SPS后7d组凋亡率开始下降,SPS后14d组凋亡率进一步降低(P5、数目减少同时ACP酶的增加有利于凋亡产物的清除,由此可解释海马萎缩体积减小。2、PTSD样大鼠海马神经元LTP抑制,提示可能与PTSD所致记忆失常机制相关。关键词PTSD(gtJ伤后应激障碍);海马;细胞凋亡;流式细胞术;ACP(酸性磷酸酶);LTP(长时程增强)4●英文论著摘要LTPandACPexpressionchangecomplicationll■·■thehippocampusneuronapoptosisinPTSD—likeratsObjectivePost·traumaticstressdisorder(PTSD)involvest6、hedevelopmentoflong—lastingsymptomsfollowingexposuretoalifethreateningexperiencetowhichtheimmediatereactionincludesintensefear,helplessness,orhorror.Theresultingsymptomsincludepersistentandspontaneousrecollectionofthetraumaticevent,psychicnumbing,avoidanceoftraumaassociatedstim7、uliandincreasedarousal,selectiveforgettingtowoundexperiencealong晰tllthenaturaldisaster,thesignificanttrafficaccident,theWar,thesocialviolenceandtheaccident,thePTSDformationrateismuchmorehigher.NowadaysPTSDcharacteristics晰廿lllighincidencerate,thelongillnesscourse,withdifficultyc8、uresandSOon,havingpaymuchmoreattentionastheseriouslyph
5、数目减少同时ACP酶的增加有利于凋亡产物的清除,由此可解释海马萎缩体积减小。2、PTSD样大鼠海马神经元LTP抑制,提示可能与PTSD所致记忆失常机制相关。关键词PTSD(gtJ伤后应激障碍);海马;细胞凋亡;流式细胞术;ACP(酸性磷酸酶);LTP(长时程增强)4●英文论著摘要LTPandACPexpressionchangecomplicationll■·■thehippocampusneuronapoptosisinPTSD—likeratsObjectivePost·traumaticstressdisorder(PTSD)involvest
6、hedevelopmentoflong—lastingsymptomsfollowingexposuretoalifethreateningexperiencetowhichtheimmediatereactionincludesintensefear,helplessness,orhorror.Theresultingsymptomsincludepersistentandspontaneousrecollectionofthetraumaticevent,psychicnumbing,avoidanceoftraumaassociatedstim
7、uliandincreasedarousal,selectiveforgettingtowoundexperiencealong晰tllthenaturaldisaster,thesignificanttrafficaccident,theWar,thesocialviolenceandtheaccident,thePTSDformationrateismuchmorehigher.NowadaysPTSDcharacteristics晰廿lllighincidencerate,thelongillnesscourse,withdifficultyc
8、uresandSOon,havingpaymuchmoreattentionastheseriouslyph
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