中国病理生理杂志
中國病理生理雜誌
중국병리생리잡지
Chinese Journal of Pathophysiology
2015年
11期
2027-2032
,共6页
汤爱莲%李灿%邹楠%张霞
湯愛蓮%李燦%鄒楠%張霞
탕애련%리찬%추남%장하
脂联素%主要组织相容性复合物Ⅱ类%糖脂代谢
脂聯素%主要組織相容性複閤物Ⅱ類%糖脂代謝
지련소%주요조직상용성복합물Ⅱ류%당지대사
Adiponectin%Major histocompatibility complex classⅡ%Glucose and lipid metabolism
目的:探讨脂联素是否通过影响脂肪组织主要组织相容性复合物Ⅱ类( MHCⅡ)的表达调节糖脂代谢。方法:脂联素基因敲除小鼠( KO)和C57BL/6小鼠( WT)分别给予高脂饲料或普通饲料,24周后,测量小鼠体重、空腹血糖(FBG)、空腹胰岛素(FINS)、稳态胰岛素评价指数(HOMA-IR)、血清甘油三酯(TG)、血清总胆固醇( TC)、血清低密度脂蛋白胆固醇( LDL-C)和血清高密度脂蛋白胆固醇( HDL-C);行肝脏组织病理形态学评价;检测脂肪组织MHCⅡ反式激活因子(CIITA)、小鼠MHCⅡ抗原Eβ(H2-Eb1)、MHCⅡ恒定链(CD74) mRNA及MHCⅡ相关蛋白质表达水平。用siRNA沉默3T3-L1脂肪细胞中MHCⅡ的表达及用过表达载体升高3T3-L1脂肪细胞中的脂联素和(或) MHCⅡ的表达,检测脂联素对MHC Ⅱ蛋白水平的影响。结果:高脂饲料或普通饲料喂养的KO小鼠体重、FBG、FINS、HOMA-IR、TC、TG、LDL-C、肝脂肪变性、脂肪组织中CIITA、H2-Eb1、CD74 mRNA和MHCⅡ蛋白表达水平均高于WT小鼠。在脂肪细胞中,抑制脂联素能够在一定程度上逆转siRNA干扰所引起的MHCⅡ表达降低,过表达脂联素后脂肪细胞中MHCⅡ的表达降低。结论:脂联素可以通过抑制脂肪组织中MHCⅡ的表达改善糖脂代谢。
目的:探討脂聯素是否通過影響脂肪組織主要組織相容性複閤物Ⅱ類( MHCⅡ)的錶達調節糖脂代謝。方法:脂聯素基因敲除小鼠( KO)和C57BL/6小鼠( WT)分彆給予高脂飼料或普通飼料,24週後,測量小鼠體重、空腹血糖(FBG)、空腹胰島素(FINS)、穩態胰島素評價指數(HOMA-IR)、血清甘油三酯(TG)、血清總膽固醇( TC)、血清低密度脂蛋白膽固醇( LDL-C)和血清高密度脂蛋白膽固醇( HDL-C);行肝髒組織病理形態學評價;檢測脂肪組織MHCⅡ反式激活因子(CIITA)、小鼠MHCⅡ抗原Eβ(H2-Eb1)、MHCⅡ恆定鏈(CD74) mRNA及MHCⅡ相關蛋白質錶達水平。用siRNA沉默3T3-L1脂肪細胞中MHCⅡ的錶達及用過錶達載體升高3T3-L1脂肪細胞中的脂聯素和(或) MHCⅡ的錶達,檢測脂聯素對MHC Ⅱ蛋白水平的影響。結果:高脂飼料或普通飼料餵養的KO小鼠體重、FBG、FINS、HOMA-IR、TC、TG、LDL-C、肝脂肪變性、脂肪組織中CIITA、H2-Eb1、CD74 mRNA和MHCⅡ蛋白錶達水平均高于WT小鼠。在脂肪細胞中,抑製脂聯素能夠在一定程度上逆轉siRNA榦擾所引起的MHCⅡ錶達降低,過錶達脂聯素後脂肪細胞中MHCⅡ的錶達降低。結論:脂聯素可以通過抑製脂肪組織中MHCⅡ的錶達改善糖脂代謝。
목적:탐토지련소시부통과영향지방조직주요조직상용성복합물Ⅱ류( MHCⅡ)적표체조절당지대사。방법:지련소기인고제소서( KO)화C57BL/6소서( WT)분별급여고지사료혹보통사료,24주후,측량소서체중、공복혈당(FBG)、공복이도소(FINS)、은태이도소평개지수(HOMA-IR)、혈청감유삼지(TG)、혈청총담고순( TC)、혈청저밀도지단백담고순( LDL-C)화혈청고밀도지단백담고순( HDL-C);행간장조직병리형태학평개;검측지방조직MHCⅡ반식격활인자(CIITA)、소서MHCⅡ항원Eβ(H2-Eb1)、MHCⅡ항정련(CD74) mRNA급MHCⅡ상관단백질표체수평。용siRNA침묵3T3-L1지방세포중MHCⅡ적표체급용과표체재체승고3T3-L1지방세포중적지련소화(혹) MHCⅡ적표체,검측지련소대MHC Ⅱ단백수평적영향。결과:고지사료혹보통사료위양적KO소서체중、FBG、FINS、HOMA-IR、TC、TG、LDL-C、간지방변성、지방조직중CIITA、H2-Eb1、CD74 mRNA화MHCⅡ단백표체수평균고우WT소서。재지방세포중,억제지련소능구재일정정도상역전siRNA간우소인기적MHCⅡ표체강저,과표체지련소후지방세포중MHCⅡ적표체강저。결론:지련소가이통과억제지방조직중MHCⅡ적표체개선당지대사。
AIM:To investigate whether the protective effect of adiponectin on glucose and lipid metabolism is achieved through down-regulating major histocompatibility complex classⅡ( MHCⅡ) in the adipose tissue.METHODS:Adiponectin knockout ( KO) mice and C57BL/6 ( WT) mice were fed with high-fat diet and standard diet for 24 weeks, re-spectively.The body weight, fasting blood glucose (FBG), fasting insulin (FINS), homeostasis model assessment of insu-lin resistance (HOMA-IR), triglyceride (TG), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol ( HDL-C) , hepatic histology, and classⅡtrans-activator ( CIITA) , histocompatibility 2 class II antigen E beta (H2-Eb1) and cluster of differentiation 74 (CD74) mRNA and MHC II protein levels in adipose tissue were measured at sacrifice.siRNA targeting MHC II and overexpression vector was used in 3T3-L1 cells to explore the effect of adiponectin on the protein level of MHCⅡ.RESULTS:The levels of body weight, FBG, FINS, HOMA-IR, TC, TG, LDL-C, hepatic steatosis, CIITA, H2-Eb1 and CD74 mRNA expression, and MHCⅡ protein expression in the KO mice were higher than those in the WT mice that fed with high-fat diet or standard diet.In 3T3-L1 cells, inhibition of adiponectin reversed MHC II protein level induced by specific siRNA.The expression of MHC II in adipocytes decreased after adiponectin was overexpressed.CONCLUSION: Adiponectin improves glucose and lipid metabolism through sup-pressing the expression of MHCⅡin the adipose tissue.