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ID:34599663
大小:10.06 MB
页数:48页
时间:2019-03-08
《墨蝶呤对糖尿胃轻瘫大鼠胃排空的影响及机制研究》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、摘要目的:观察链脲佐菌素(STZ)所致糖尿病大鼠胃运动改变,探讨墨蝶呤(SEP)对雌性糖尿病大鼠胃排空的影响及机制。方法:采用STZ腹腔注射诱导糖尿病大鼠模型:利用电场刺激测定胃平滑肌条氮能舒张反应;通过比色法分析一氧化氮含量;Westernblot检测nNOS表达。结果:糖尿病大鼠体重显著下降(t=2.45,p<0.05),同时血糖显著升高(t=l1.05,p<0.01);SEP(20mg/kg)灌胃10天对糖尿病大鼠体重(t=0.28,t=0.92,P>0.05)和血糖(t=O.87,t=0.79,P>0.05)无显著改善效应;糖尿病大鼠胃排空率显著降低
2、(t=7.39,p<0.01),SEP可使糖尿病大鼠胃排空率显著升高(t=7.08,p<0.01),但对正常大鼠无显著影响(t=0.26,P=0.80);电场刺激平滑肌条可使糖尿病大鼠胃平滑肌条舒张作用明显减弱(t=9.71,p<0.01);SEP治疗大鼠,场刺激可使大鼠肌条舒张作用显著增强(t=6.65,p<0。01);MTX灌胃4天的大鼠,场刺激胃平滑肌条,氮能舒张作用显著降低(胃底:t=2.36,p<0.05,胃窦:t=2.36,p<0.05,幽门:t=2.36,p<0.05);MTX可使离体大鼠胃平滑肌N0释放量显著降低(仁3.73,P<0.01);
3、SEP可翻转MTX诱导的NO减少效应(t=2.59,P<0.05)。糖尿病大鼠胃内nNOS蛋白水平显著降低(F2.26,p4、diabetesmellitus(DM),andtostudytheeffectsofsepiapterin(SEP)ongastricemptyingandnitrergicsysteminfemalediabeticrats.Methods:AratmodelofDMwascreatedbyintraperitonealinjectionofstreptozotocin(STZ).GastricnitrergicrelaxationinthepresenceorabsenceofhighglucoseandSEPweremeasuredbyelectri5、cfieldstimulation.NitricoxidereleaseWasmeasuredcolorimetricallybyNOassaykit.TheexpressionofnNOSaanddimerizationWasdetectedbyWesternblot.Results:AsignificantweightlossWasnotedinthediabeticratscomparedtocontrolgroup(t=-2.45,p<0.05).Fastingbloodglucoselevelsweresignificantlyelevatedin6、femaleratsafterdiabetesinduction(t=11.05,p<0.01).Weight(t=0.28,FO.92,P>0.05)andbloodglucoselevels(仁O.87,t=O.79,P>0.05)wereunchangeduponsupplementationofSEP10daysinbothcontrolandindiabeticfemalerats.AsignificantreductioninthesolidgastricemptyingWasobservedindiabeticratscomparedtocon7、trol(t=-7.39,p8、rergicrelaxationcomparedwi
4、diabetesmellitus(DM),andtostudytheeffectsofsepiapterin(SEP)ongastricemptyingandnitrergicsysteminfemalediabeticrats.Methods:AratmodelofDMwascreatedbyintraperitonealinjectionofstreptozotocin(STZ).GastricnitrergicrelaxationinthepresenceorabsenceofhighglucoseandSEPweremeasuredbyelectri
5、cfieldstimulation.NitricoxidereleaseWasmeasuredcolorimetricallybyNOassaykit.TheexpressionofnNOSaanddimerizationWasdetectedbyWesternblot.Results:AsignificantweightlossWasnotedinthediabeticratscomparedtocontrolgroup(t=-2.45,p<0.05).Fastingbloodglucoselevelsweresignificantlyelevatedin
6、femaleratsafterdiabetesinduction(t=11.05,p<0.01).Weight(t=0.28,FO.92,P>0.05)andbloodglucoselevels(仁O.87,t=O.79,P>0.05)wereunchangeduponsupplementationofSEP10daysinbothcontrolandindiabeticfemalerats.AsignificantreductioninthesolidgastricemptyingWasobservedindiabeticratscomparedtocon
7、trol(t=-7.39,p8、rergicrelaxationcomparedwi
8、rergicrelaxationcomparedwi
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