资源描述:
《论文:缩醛磷脂酰乙醇胺对羟自由基所致大鼠脑线粒体氧化损伤的保护作用》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、缩醛磷脂酰乙醇胺对羟自由基所致大鼠脑线粒体氧化损伤的保护作用张树平1,田京伟2,杨建雄3,王垣芳11山东省滨州医学院药理学教研室(烟台校区),山东烟台2640032山东省烟台大学药学院,山东省天然药物工程技术研究中心山东烟台2640033陕西师范大学生命科学学院陕西西安710062摘要:目的研究缩醛磷脂酰乙醇胺对羟自由基所致大鼠脑线粒体损伤的保护作用。方法利用Fe2++VitC系统产生·OH,诱导大鼠脑线粒体损伤;测定线粒体肿胀度、膜流动性、膜磷脂含量、呼吸功能、线粒体呼吸酶、超氧化物歧化酶(SOD)、丙二醛(MDA)、Ca2+等指标以显示线粒体膜功能、呼吸功能
2、、抗氧化能力的变化。结果·OH造成线粒体显著损伤,缩醛磷脂酰乙醇胺(终浓度0.03、0.06、0.12、0.24、0.48mmol·L-1)明显抑制膜磷脂降解、线粒体肿胀,增加膜流动性,改善线粒体能量代谢,增强抗氧化能力。结论缩醛磷脂酰乙醇胺对·OH所致大鼠脑线粒体损伤有明显保护作用,其机制与减少自由基对线粒体膜的损伤、抑制脂质过氧化有关。关键词缩醛磷脂酰乙醇胺;线粒体;羟自由基;能量代谢Protectiveeffectofplasmenylethanolamineagainstratcortexmitochondriainjuryinducedby·OHZHA
3、NGShu-ping1,TIANJing-wei2,YANGJian-xiong3,WANGYuan-fang1(1.DepartmentofPharmacology,BinzhouMedicalCollege,YantaiShandong264003,China;2.SchoolofPharmaceuticalScience,ShandongYantaiUniversity;ShandongEngineeringResearchCenterforNaturalDrugs,YantaiShandong264003,China;3.CollegeofLifeSci
4、ence,ShaanxiNormalUniversity,Xi’anShaanxi710062,China)ABSTRACT:OBJECTIVETostudytheeffectsofplasmenylethanolamineoncortexmitochondriainjuriesinducedby·OHinrats.METHODSFe2++VitCsystemtoproduce·OHwereavailable,cortexmitochondriaofratswereisolated,membranefluidity,swelling,respiratoryfun
5、ction,activitiesofmitochondriarespiratoryenzymes,contentsofphospholipidandCa2+weredeterminedtoevaluatetheabilityofmitochondriaenergymetabolism.Theactivityofsuperoxidedismutase(SOD)andcontentsofmalondialdehyde(MDA)werealsodeterminedtoevaluatetheantioxygenationabilityofmitochondria.RES
6、ULTSThedataindicatedthat·OHresultedinsevereneuronalmitochondriainjuries,Whichcouldbealleviatedbyplasmenylethanolamine(contentof0.12,0.24and0.48mmol·L-1).Theswellingofmitochondriawasameliorated,thedecomposabilityofmitochondriamembranephospholipidwasdecreased,membranefluidityofmitochon
7、driawasincreased,plasmenylethanolaminealsosignificantlyinhibitedthedecreaseinSOD,NADHdehydrogenase,SuccinatedehydrogenaseandCytochromeoxidaseactivitiesandtheincreaseinMDAandCa2+levelscausedby·OH.CONCLUSIONPlasmenylethanolamineshowedaprotectiveactionagainsttheratcortexmitochondriainju
8、riesinducedb