目的:探索二甲双胍干预对初诊2型糖尿病(type2diabetesmellitus,T2DM)患者血清Irisin水平的影响及其延缓动脉粥样硬化(atherosclerosis,AS)的作用。方法:将120例初诊T2DM患者随机分为2组,每组60例,2组均予二甲双胍治疗6个月,低剂量组二甲双胍(250mg,tid),高剂量组二甲双胍(500mg,tid),超声检测治疗前后患者颈动脉内中膜厚度(carotidinti-ma-mediathickness,CIMT),检测治疗前后血清基质金属蛋白酶9(matrixmetalloprotein9,MMP9)水平,并比较2组治疗前后血清Irisin、空腹血糖(fastbloodglucose,FBG)、三酰甘油(triacylglycerol,TAG)及体质指数(bodymassindex,BMI)等其他生化指标水平。结果:治疗前,2组患者基线资料比较,差异无统计学意义(P>0.05)。与治疗前相比,低剂量组治疗后血清Irisin水平明显升高(215.17±89.96vs.356.66±102.32,P<0.05),高剂量组治疗后CIMT明显改善(1.43±0.89vs.1.10±1.21,P<0.05),血清Irisin水平明显升高(238.17±67.96vs.389.43±93.43,P<0.05),2组MMP9及氧化应激水平均明显降低(P<0.05)。与低剂量组相比,高剂量组治疗前后MMP9及丙二醛(malondialdehyde,MDA)减少更明显,血清Irisin水平升高更明显,差异有统计学意义(P<0.05)。相关性分析结果显示,6个月后高剂量组ΔCIMT与血清ΔIrisin水平呈负相关,与ΔBMI、ΔFPG、ΔTG及氧化应激水平变化呈正相关。ΔMMP9与血清ΔIrisin水平呈负相关,与ΔFBG及氧化应激水平变化呈正相关。ΔIrisin水平与氧化应激水平变化呈负相关。进一步分别以高剂量组ΔCIMT及ΔMMP9为因变量,以其他相关因素为自变量进行多元线性逐步回归分析。结果显示ΔIrisin与氧化应激水平变化是ΔCIMT及ΔMMP9的独立影响因素。结论:初诊T2DM患者使用二甲双胍在降糖治疗同时能延缓颈动脉粥样硬化进展,部分原因可能与升高Irisin水平及改善氧化应激有关。
Objective:Toexploretheeffectofmetformininterventiononserumirisinlevelsinpatientswithnewlydiagnosedtype2diabetesmellitus(T2DM)anditsroleindelayingatherosclerosis(AS).Methods:Onehundredandtwentypatientswithnewlydiag-nosedT2DMwererandomlydividedintotwogroups,namelylow-dosegroupandhigh-dosegroup,with60casesineachgroup.Boththelow-dosegroup(250mg,tid)andthehigh-dosegroup(500mg,tid)weretreatedwithmetforminfor6months.Carotidin-tima-mediathickness(CIMT)wasmeasuredbyultrasound.Thelevelsofmatrixmetalloprotein9(MMP9)andotherbiochemi-calindexessuchasfastfoodglucose(FBG),triacylglycerol(TAG)andbodymassindex(BMI)werecomparedbeforeandaftertreatment.Results:Beforetreatment,therewasnosignifi-cantdifferenceinbaselinedatabetweenthetwogroups(P>0.05).Aftertreatment,thelow-dosegrouphadasignificantlyincreasedlevelofserumirisin(215.17±89.96vs.356.66±102.32,P<0.05),whilethehigh-dosegroupshowedasignificantimprovementinCIMT(1.43±0.89vs.1.10±1.21,P<0.05)inadditiontoasignificantincreaseinserumIrisinlevel(238.17±67.96vs.389.43±93.43,P<0.05).Meanwhile,thereweresignificantreductionsinthelevelsofMMP-9andoxidativestressinbothgroups(P<0.05).Comparedwiththelow-dosegroup,thehigh-dosegrouphadsignificantlygreaterreductionsinMMP9andmalondialdehydeandasignificantlygreaterincreaseinserumIrisin(P<0.05).Correlationanalysisshowedthatafter6months,ΔCIMTinthehighdosegroupwasnegativelycorrelatedwithserumΔirisin,andpositivelycorrelatedwithΔBMI,ΔFBG,ΔTGandchangeofoxidativestresslevel.ΔMMP9wasnegativelycorrelatedwithserumΔirisinandpositivelycorrelat-edwithΔFPGandchangeinoxidativestresslevel.ΔIrisinwasnegativelycorrelatedwiththechangeinoxidativestresslevel.Fur-thermore,multivariatelinearstepwiseregressionanalysiswasperformedwithΔCIMTandΔMMP9inthehigh-dosegroupasdepen-dentvariables,andotherrelatedfactorsasindependentvariables.TheresultsshowedthatΔirisinandchangeinoxidativestresslevelwereindependentinfluencingfactorsforΔCIMTandΔMMP9.Conclusion:Metformincandelaytheprogressionofcarotidatheroscle-rosisinpatientsnewlydiagnosedwithT2DM,partlyduetotheelevatedirisinlevelandimprovedoxidativestress.
张佳新,刘师伟,李欣. Irisin水平变化在T2DM患者二甲双胍治疗中与动脉粥样硬化指标的关系研究[J].重庆医科大学学报,2020,45(3):372-