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《壳聚糖对镉致大鼠肝脏线粒体氧化损伤的影响-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、·884·环境与健康杂志2013年1O月第30卷第1O期JEnvironHealth,October2013,Vo1.30,No.10·基础与应用·壳聚糖对镉致大鼠肝脏线粒体氧化损伤的影响赵英政,徐光翠,吴辉,韩光亮,张合喜新乡医学院公共卫生学院,河南新乡453003摘要:目的探讨壳聚糖对镉染毒大鼠肝脏线粒体氧化损伤的影响。方法将40只清洁级健康sD大鼠随机分为5组,分别为对照组、0.8mg/kg氯化镉组和低、中、高剂量干预(20、100、500mg/kg壳聚糖+0.8mg/kg氯化镉)组,每组8只,雌雄各半。干预组采用灌胃方式给予壳聚糖;2h
2、后,采用腹腔注射方式染毒氯化镉,每天1次,连续染毒7d。对照组和0.8mg/kg氯化镉组先灌胃蒸馏水,2h后,对照组腹腔注射生理盐水,氯化镉组腹腔注射氯化镉溶液。测定大鼠肝脏线粒体中超氧化物歧化酶(SOD)活力和还原型谷胱甘肽(GSH)含量。结果与对照组比较,氯化镉组、低、高剂量干预组雌雄大鼠肝线粒体SOD活力、GSH含量以及中剂量干预组雄性大鼠肝线粒体GSH含量均下降,差异有统计学意义(尸<0.05)。与氯化镉组比较,仅中剂量干预组大鼠肝线粒体SOD活力升高,差异有统计学意义(P<0.05);各剂量干预组和氯化镉组大鼠肝线粒体GSH含量均无明
3、显变化。结论壳聚糖对镉致大鼠肝脏线粒体氧化损伤具有一定拮抗作用。关键词:镉;壳聚糖;线粒体;超氧化物歧化酶;还原型谷胱甘肽中图分类号:R994.6文献标志码:A文章编号:1001—5914(2013)10—0884—03Protectiveeriectsofchitosanoncadmium—inducedoxidativedamageinlivermitochondriaofratsZHAOYing—zheng,XUGuang—cui,wuhui,HANGuang-liang,ZHANGHe—xi.DepartmentofPublicHeal
4、thXinxiangMedicalUniversity,Xinxiang,He’nan453003,ChinaCorresp0ndingauthor:ZHANGHe—xi,E—mail:hexich@xxmu.edu.cnAbstract:ObjectiveToinvestigatetheprotectiveeffectsofchitosanoncadmium—inducedoxidativedamageiulivermitochondriaofrats.MethodsAtotaIof40cleanSDratsfmale:female=1:1)
5、wererandomlydividedintofivegroups,namelythecontrolgroup,0.8mg/kgCdC12groupand20,100,500mg/kgchitosan+0.8mg/kgCdCI2groupsrespectively,eightanimalsineachgroup.Theratsincontrolgroupweretreatedwithdistilledwaterthroughgavageandfollowedbynormalsaline(NS)throughintraperitonealinje
6、ction.Theratsin0.8mg/kgCdC12groupweretreatedwithdistilledwaterasthecontrolfirstandwasinjectedintraperitoneallywith0.8mg/kgCdCl2after2h.Theratsineachchitosaninterventiongroupwereinjectedintraperitoneallywith0.8mg/kgbodyweightCdC12,after2hours,chitosanwasgivenatthedosesof20,10
7、0and500mg/kgbodyweightrespectivelythroughgavage.Theanimalsinallgroupsweretreatedonceadayforsevenconsecutivedays.TheSODactivitiesweredeterminmedbythepyrogallolautoxidationmethod,theGSHcontentsweremeasuredbythechromogenicDTNBmethodinmitochondria.ResultsComparedwithcontrolgroup
8、,theSODactivityandtheGSHcontentinmitochondriadecreasedin0.8mg/kgCdC12group,
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