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ID:21670067
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时间:2018-10-23
《黄蜀葵花中黄酮类成分对前脂肪细胞增殖、分化及胰岛素抵抗的影响》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、黄蜀葵花中黄酮类成分对前脂肪细胞增殖、分化及胰岛素抵抗的影响 [摘要]?S蜀葵花中富含黄酮类成分,具有保护心血管、改善肾功能等作用。该文采用3T3-L1前脂肪细胞诱导分化的成熟脂肪细胞,建立胰岛素抵抗模型,分为正常组,模型组,异槲皮苷(HY)、金丝桃苷(JY)、槲皮素(QT)、槲皮素-3′-O-葡萄糖苷(QG)、棉皮素-8-O-β-葡萄糖醛酸(GG)给药组,BCA法检测细胞培养液中葡萄糖的含量,荧光定量qPCR检测PPARγ,C/EBPα,SREBP-1,脂联素,内酯素,抵抗素基因mRNA的表达水平。结果显示,5种黄酮类化合物5μmol?L-1浓度时可促进3T3-L1前
2、脂肪细胞的增殖,浓度为100μmol?L-1时可抑制前脂肪细胞的增殖;与正常组比较,模型组细胞对葡萄糖摄取量降低(P<0.01);与模型组相比,5种黄酮类化合物100μmol?L-1给药组细胞葡萄糖消耗量显著上升(P<0.01),PPARγ,C/EBPα,脂联素表达明显增加(P<0.01),SREBP-1,抵抗素,内酯素的表达明显降低(P<0.01),促使脂肪细胞分化。研究表明,HY,JY,QT,QG,GG能调控前脂肪细胞增殖,促进脂肪细胞分化及糖脂代谢相关因子PPARγ,C/EBPα,SREBP-1,脂联素,内酯素,抵抗素的表达,促进前脂肪细胞分化,增加葡萄糖利用,从而
3、改善胰岛素抵抗。 [关键词]锦葵科;黄属葵花;胰岛素抵抗;黄酮类成分;3T3-L1脂肪细胞 [Abstract]Abelmoschusmanihotwasrichinflavonoids,whichhasbeenreportedtheactivityonprotectingangiocarpyandimprovingrenalfunction.ThisstudyaimedtoexploretheactionmechanismoffiveflavonoidsfromA.manihotonhowtoamelioratinginsulinresistancethrought
4、heregulationoftheglucoseandexpressionofPPARγ,C/EBPα,SREBP-1,resistin,visfatin,adiponectinin3T3-L1adipocytes.Afterthe3T3-L1preadipocytesweredifferentiatedintomatureadipocytes,insulinresistancemodelwasbuilt.Insulinresistanceadipocytesweretreatedwith5,100μmol?L-1quercetin,isoquercitrin,hyper
5、oside,quercitrin-3′-O-glucoside,gossypetin-8-O-β-glucoside.TheglucosewasindirectlydeterminedbyBCAkit.ThemRNAexpressionlevelsofPPARγ,C/EBPα,SREBP-1,resistin,visfatin,adiponectinweredetectedbyreal-timequantitativePCR.Resultsshowedthatfiveflavonoidsat5μmol?L-1couldacceleratepreadipocytesprol
6、iferationandinhibitthatat100μmol?L-1Comparedwiththenormalgroup,glucoseuptakereducedsignificantlyinmodelgroup(P<0.01).Withthetreatmentoffiveflavonoidsat100μmol?L-1,glucoseconsumptionincreasedsignificantly(P<0.01).ThehighexpressionofPPARγ,C/EBPα,adiponectinexpressionwassignificantlyincrease
7、d(P<0.01),andlowexpressionofSREBP-1,resistin,visfatinafterrespectiveadministrationwithfiveflavonoidsat100μmol?L-1promotedadipocytedifferentiation.Thisstudyshowedthat,HY,JY,QT,QG,GGcancontrolpreadipocytesproliferation,promoteadipocytedifferentiationandregulatetheexpr
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