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时间:2020-04-02
《PI3KAkt信号通路在大鼠糖尿病神经病理性疼痛中的作用.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、重庆医学2009年7月第38卷第14期1757·论著·PI3K/Akt信号通路在大鼠糖尿病神经病理性疼痛中的作用柯昌斌,黄晓霞,秦成名,李元涛,许先成,罗向红,刘菊英,周青山。(郧阳医学院附属太和医院:1.麻醉科;2.肾病内科,湖北十堰442000;3.武汉大学人民医院麻醉科,武汉430071)摘要:目的研究PI3K/Akt信号通路在大鼠糖尿病神经病理痛中的作用。方法Wistar大鼠,体质量180~220g,腹腔单次注射链脲菌素65mg/kg制作糖尿病神经病理痛模型。4周后用Vonfrey纤维测双后足机械痛闽,痛闲明显
2、下降者为糖尿病神经病理性疼痛造模成功。将64只成模大鼠随机分为两组:糖尿病神经病理痛组(D组)和PI3K抑制剂组(I组),另取同窝大鼠32只作为对照组(C组)。I组大鼠静脉注射0.5mg/kg的PI3K抑制剂Wortmannin,1次/天。于实验开始后第4、6、8、l0周末,各组分0随机取8只大鼠,采用Vonfrey纤维丝测机械缩足反应阈值(MWT),用肌电图仪测定神经传导速度(NCV),用免疫组化和Westernblot法检测脊髓和背根神经节(DRG)磷酸化Akt(p-Akt)水平。结果与c组比较,D组和I组均在第4
3、周开始出现MWT降低,NCV减慢(P<0.05)并持续至第1O周;与D组比较,在用药后各时点I组MWT和NCV升高(P<0.05)。与C组比较,在脊髓和背根神经节中,D组和I组均在第4周开始出现p~Akt升高(P4、757-03RoleofPI3K/AktsignalpathwayindiabeticneuropathicpaininratsKEChang—bin,HUANGXiao—xia,QINCheng—ruing,eta1.(1.DepartmentofA”Psc^Ps0og;2.Department0,Kidney,TaiheHospital,YunyangMedicalCollege,Shiyan,442000,HubeiProvince,China;3.DepartmentofAnesthesidogy,People5、HospitalofWuhanUniversity,Wuhan430071,China)Abstract:ObjectiveToinvestigatetheroleofPI3K/Aktsignalpathwayindiabetesneuropathicpaininducedbystreptozoein.MethodsWistarratsweighing180——220g。Diabetesneuropathicpainwasinducedbyintraperitonealstreptozocin65mg/kg,and646、ratswithdiabeticneuropathicpainwererandomlydividedintotwogroups:group11diabeticneuropathicpainandgroupIIII+PI3Kinhibitor,while32agematchedratswereusedtobegroupIcontro1.Thenratsweregrouphousedwithfullaccesstofoodandwater.Atthebeginoffifthweek,ratsingroupmreceived7、Wortmannin,aselectivePI3Kinhibitor0.5mg/kgintravenousfromtailveinonceaday,whiletheanimalsingroupIandlIreceivedvehicleonly.Attheendofthefourth,sixth,eighthandtenthweek,Pawwithdrawalmechanicalthreshold(MWT)weremeasuredbyasetofVonFreyfilaments.Theanimalswereanesthe8、tizedandnerveconductionvelocity(NCV)ofleftsciaticnervewasmeasured.Theanimalswerethenkilledandthelumbarsegmentofthespinalcordanddorsalrootganglion(DRG)wereremovedforde
4、757-03RoleofPI3K/AktsignalpathwayindiabeticneuropathicpaininratsKEChang—bin,HUANGXiao—xia,QINCheng—ruing,eta1.(1.DepartmentofA”Psc^Ps0og;2.Department0,Kidney,TaiheHospital,YunyangMedicalCollege,Shiyan,442000,HubeiProvince,China;3.DepartmentofAnesthesidogy,People
5、HospitalofWuhanUniversity,Wuhan430071,China)Abstract:ObjectiveToinvestigatetheroleofPI3K/Aktsignalpathwayindiabetesneuropathicpaininducedbystreptozoein.MethodsWistarratsweighing180——220g。Diabetesneuropathicpainwasinducedbyintraperitonealstreptozocin65mg/kg,and64
6、ratswithdiabeticneuropathicpainwererandomlydividedintotwogroups:group11diabeticneuropathicpainandgroupIIII+PI3Kinhibitor,while32agematchedratswereusedtobegroupIcontro1.Thenratsweregrouphousedwithfullaccesstofoodandwater.Atthebeginoffifthweek,ratsingroupmreceived
7、Wortmannin,aselectivePI3Kinhibitor0.5mg/kgintravenousfromtailveinonceaday,whiletheanimalsingroupIandlIreceivedvehicleonly.Attheendofthefourth,sixth,eighthandtenthweek,Pawwithdrawalmechanicalthreshold(MWT)weremeasuredbyasetofVonFreyfilaments.Theanimalswereanesthe
8、tizedandnerveconductionvelocity(NCV)ofleftsciaticnervewasmeasured.Theanimalswerethenkilledandthelumbarsegmentofthespinalcordanddorsalrootganglion(DRG)wereremovedforde
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