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ID:36641152
大小:1.04 MB
页数:48页
时间:2019-05-13
《瘦素对大鼠血压影响的观察》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、华中科技大学硕士学位论文瘦素对大鼠血压影响的观察姓名:张慧玲申请学位级别:硕士专业:内科学指导教师:成蓓2003.4.1华中科投大学同济医学院硕士学位论文瘦素对大鼠血压影响的观察研究生张慧玲导师成蓓华中科技大学同济医学院附属协和医院心内科中文摘要背景自1994年美国学者发现瘦素(Leptin)后,研究显示它不仅与肥胖、胰岛素抵抗、糖尿病密切相关,而且在血压调节中的作用臼益受到重视,但其作用的具体机制和途径尚不清楚。目的静脉注射Leptin于Wistar大鼠,观察其引起的血压(BP)变化及一氧化氮(N0)在其中的可能作,用。坊法60只W
2、istar大鼠随机分为2组。(1)A组观察不同剂量Leptin‘对血清一氧化氮的影响:大鼠24只,再随机分为4小组,每组6只,其中3小组分别静脉注射三种剂量(10,100和1,000ug/kg)Leptin,另一小组作为对照组静脉注射生理盐水(Saline),测定各组大鼠用药前后的血压、心率和血清NO浓度的变化。(2)B组观察生理浓度Leptin(100ug/kg)在不同条件下对血压和心率的影响:大鼠36只,再随机分为3小组,每组12只。①NO阻断组:用NO合酶抑制剂左旋精氨酸甲酯(L-NAME)阻断NO的合成后,观察Leptin对血
3、压和心率的影响。②神经节阻断组:用神经节阻断剂溴化六甲双胺(HexamethoniumBromide)阻断神经节后,观察Leptin对血压和心率的影响。⑨神经节阻断+一氧化氮阻断组:用溴化六甲双胺(HexamethoniumBromide)阻断神经节后,观察左旋精氨酸华中科技大学Ⅲ济医学院顾1:学位论文甲酯(L—NAME)对Leptin作用后的大鼠血压和心率的影响。各组均设一对照组,静脉注射生理盐水(Saline)o坌i§果静脉注射三种不同剂量Leptin90分钟后,大鼠的血清NO浓度比用药前分别升高了21.83M.25%34.92士
4、2.07%,86.88士2.00%Q5、双胺和生理浓度Lep掣共同引起的低压效应可被左旋精氨酸甲酯(L—NAME)阻滞(p6、angHui-lingTutorChengBeiDepartmentofCardiology,UnionHospital,TongjiMedicalcollege,Huazhong、UniversityofScienceandTechnology,WuhanAbstractBaekgroudSinceLeptinwasfoundin1994byAmericanresearchers,studieshavereportedthatitwascloselyassociatedwithobesity,insulinresistanceand7、diabetesmellitus.Recently,theroleofLeptininBloodPressure(BP)controlwasgottenmoreandrnoreattention,butthemechanismandregulatorypathwayonBPcontrolremainsstillunclear.ObjectlveToinvestigatethepossibleroleofnitricoxide(NO)andthechangesofBPafterintravenousadministrationofLep8、fininWistarrats.Methods(1)FourseparategroupsofWistarrats(n=6,pergroup)receivedintravenouslyoneofthreedoseofLep
5、双胺和生理浓度Lep掣共同引起的低压效应可被左旋精氨酸甲酯(L—NAME)阻滞(p6、angHui-lingTutorChengBeiDepartmentofCardiology,UnionHospital,TongjiMedicalcollege,Huazhong、UniversityofScienceandTechnology,WuhanAbstractBaekgroudSinceLeptinwasfoundin1994byAmericanresearchers,studieshavereportedthatitwascloselyassociatedwithobesity,insulinresistanceand7、diabetesmellitus.Recently,theroleofLeptininBloodPressure(BP)controlwasgottenmoreandrnoreattention,butthemechanismandregulatorypathwayonBPcontrolremainsstillunclear.ObjectlveToinvestigatethepossibleroleofnitricoxide(NO)andthechangesofBPafterintravenousadministrationofLep8、fininWistarrats.Methods(1)FourseparategroupsofWistarrats(n=6,pergroup)receivedintravenouslyoneofthreedoseofLep
6、angHui-lingTutorChengBeiDepartmentofCardiology,UnionHospital,TongjiMedicalcollege,Huazhong、UniversityofScienceandTechnology,WuhanAbstractBaekgroudSinceLeptinwasfoundin1994byAmericanresearchers,studieshavereportedthatitwascloselyassociatedwithobesity,insulinresistanceand
7、diabetesmellitus.Recently,theroleofLeptininBloodPressure(BP)controlwasgottenmoreandrnoreattention,butthemechanismandregulatorypathwayonBPcontrolremainsstillunclear.ObjectlveToinvestigatethepossibleroleofnitricoxide(NO)andthechangesofBPafterintravenousadministrationofLep
8、fininWistarrats.Methods(1)FourseparategroupsofWistarrats(n=6,pergroup)receivedintravenouslyoneofthreedoseofLep
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