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1、JSouthMedUniv,2014,34(7):1061-1064doi10.3969/j.issn.1673-4254.2014.07.30·1061·基础研究તྟࡗཱུྟಌသؓնඊܠᷘࠔ௮ฤบሇᄎϢ4іղ႕ཙ谭健,莫海兰,李洁,吴应玲,何晓丽,李兵重庆医科大学附属第一医院耳鼻咽喉科,重庆400016摘要:目的探讨慢性间歇性缺氧所致炎症因子以及复氧对大鼠糖代谢及骨骼肌葡萄糖转运蛋白4(GLUT-4)表达的影响。方法24只SD雄性大鼠,分为空白组(UC组)、慢性间歇性缺氧组(CIH组)和复氧组(RH组);所有大鼠在模型建立后,分别用氧化酶
2、-过氧化物酶法、放射免疫法、ELISA检测血糖、血清胰岛素及炎症因子的变化;Westernblotting检测骨骼肌GLUT-4蛋白的表达。结果大鼠空腹血糖,CIH组高于UC组和RH组(P<0.05),RH组高于UC组(P<0.05);血清胰岛素及胰岛素抵抗指数,CIH组高于UC组和RH组(P<0.05)。各组大鼠血清炎症指标TNF-α、IL-6,CIH组显著高于UC组和RH组(P<0.05),RH组高于UC组(P<0.05)。大鼠骨骼肌GLUT4蛋白,CIH组显著低于UC组和RH组(P<0.05),RH组低于UC组(P<0.05)。结论
3、慢性间歇性缺氧可引起大鼠体内炎症因子增加及胰岛素抵抗;大鼠胰岛素抵抗与炎症因子所致的骨骼肌GLUT-4蛋白量降低有关。关键词:睡眠呼吸紊乱;慢性间歇性缺氧;炎症因子;糖代谢;胰岛素抵抗;葡萄糖转运蛋白4Effectsofchronicintermittenthypoxiaonglucosetransporter4expressioninratskeletalmusclesTANJian,MOHailan,LIJie,WUYingling,HEXiaoli,LIBingDepartmentofOtlaryngology,FirstAffil
4、iatedHospitalofChongqingMedicalUniversity,Chongqing400016,ChinaAbstract:ObjectiveTostudytheeffectofchronicintermittenthypoxia-inducedinflammatorycytokinesandreoxygenationonglucosetransporter4(GLUT-4)expressioninratskeletalmuscles.MethodsTwenty-fourmaleSprague-Dawleyratswe
5、rerandomlyassignedtoblankcontrolgroup,chronicintermittenthypoxia(CIH)group,andreoxygenationgroup.Attheendoftheexperiment,fastingbloodglucose(FBG),fastingbloodinsulin(FINS)andseruminflammatorycytokinelevelsweremeasuredwithglucoseoxidase-peroxidase,insulinradioimmunoassayan
6、dELISA,respectively.Homeostasismodelassessment(IRI)wasusedtoevaluateinsulinresistanceintherats,andGLUT-4proteinexpressionintheskeletalmuscleswasmeasuredwithWesternblotting.ResultsComparedwiththeblankcontrolgroup,CIHresultedinsignificantlyincreasedfastingbloodglucose,blood
7、insulinlevelsandinsulinresistanceindex(IRI)(P<0.05);fastingbloodglucosewassignificantlyelevatedinreoxygenationgroup(P<0.05).Inflammatorycytokineslevels(IL-6andTNF-α)weresignificantlyhigherinCIHgroupthanintheblankcontrolandreoxygenationgroups(P<0.05),andwerehigherinreoxyge
8、nationgroupthanintheblankcontrolgroup.GLUT-4expressionintheskeletalmuscleswassignificantlyreduce