欢迎来到天天文库
浏览记录
ID:55685010
大小:536.64 KB
页数:3页
时间:2020-05-24
《葡萄籽原花青素对睡眠呼吸暂停模式低氧大鼠海马区线粒体损伤及学习记忆的影响.pdf》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、·584·中华行为医学与脑科学杂志2013年7月第22卷第7期ChinJBehavMed&BrainSci,July2013,Vo1.22,No.7·基础研究·葡萄籽原花青素对睡眠呼吸暂停模式低氧大鼠海马区线粒体损伤及学习记忆的影响赵雅宁刘文倩曹书华郭霞王红FEl【摘要】目的探讨葡萄籽原花青素对睡眠呼吸暂停模式低氧大鼠海马区线粒体损伤及学习记忆的影响。方法80只雄性SD大鼠分成对照组、模型组、高、低剂量萄籽原花青素组。对照组暴露于空气中,模型组暴露于低氧条件下(50ml/L,暴露时间每天8h,持续时间2,6周),电镜观察海马区神经细胞超微
2、结构,比色法检测大脑组织丙二醛(MDA)水平和超氧化物歧化酶(SOD)水平,原位缺口末端标记法(TUNEL)检测凋亡细胞,水迷宫测试动物学习记忆功能。结果与对照组比较,低氧后线粒体结构损伤、MDA含量明显升高[(79.86±2.52)ixmoL/g,(88.26±2.86)pmaol/g]、SOD活性显著降低[(70.67±6.70)~mol/g,(64.26±7.86)Ixmol/g]、TUNEL阳性细胞增多[(9.68±0.79)个/视野,(15.9±2.92)个/视野],水迷宫检测动物逃避潜伏期时间延长、穿台次数减少(P<0.05)
3、;与模型组比较,葡萄籽原花青素低剂量组能减轻线粒体超微结构的损伤,降低MDA含量[(76.38±1.96),(82.16-4-2.02)]、提高SOD活性[(76.20±6.86),(70.58±6.86)]、减少TUNEL阳性细胞[(6.60±0.69),(9.54±1.36)];水迷宫检测动物逃避潜伏期时间缩短、穿台次数增多(P<0.05);与低剂量组比较,高剂量组线粒体超微结构的损伤明显减轻,MDA含量降低、SOD活性增高、TUNEL阳性细胞减少;水迷宫检测动物逃避潜伏期时间缩短、穿台次数增多(P<0.05)。结论葡萄籽原花青素减轻
4、睡眠呼吸暂停模式低氧大鼠海马区线粒体结构损伤,改善学习记忆功能。【关键词】睡眠呼吸暂停;学习记忆;线粒体;葡萄籽原花青素EfectofgrapeseedproanthocyanidinonmitochondrialinjuryinhippocampusandcognitionimpairmentinaratmodelofobstructivesleepapneahypoxiaZHAOYa—ning,LIUWen—qian,CAOShu—hua,GUOXia,WANGHong—yang.TianjinUniversityofTraditio
5、nalChineseMedicine,Tianjin300000,China【Abstract】0bjectiveToinvestigatetheeffectsofgrapeseedproanthocyanidin(GSPE)onmitochondrialinjuryinhippocampusandlearning—memoryimpairmentafterobstructivesleepapneahypoxiainrats.MethodsMaleSDrats(n:80)wererandomlydividedintocontrolgrou
6、p,modelgroup,lowdoseofGSPEtreat—mentgroupandhighdoseofGSPEtreatmentgroup.Ratsincontrolgroupwereexposedinair,themodelgroupweresufferedfromintermittenthypoxiaconditions(50ml/L,8-hour-intermittenthypoxiaeveryday,andthedurationofexperiment2and6weeks,respectively).Mitochondrio
7、npathologyinhippocampalregionwasobservedusingelec—tronmicroscope;malondialdehyde(MDA)contentsandsuperoxidedismutaseactivityweredetectedbycolorimetryandapoptoticcellswasmeasuredbyTUNELmethod.ThecognitivefunctionofratsineachgroupwasassessedwiththeMorriswatermaze(MWM).Result
8、sAfterhypoxia,mitochondrionwassignificantlyinjured.TheMDAcontentswereincreased(79.86±2.52,88.26±
此文档下载收益归作者所有