脂肪与胰岛素抵抗新概念修改.ppt
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1、脂中毒与胰岛素抵抗新概念脂中毒与胰岛素抵抗新概念李李 秀秀 钧钧华西医科大学附一院华西医科大学附一院 内分泌科内分泌科Products of adipocytes which may be relevant to Products of adipocytes which may be relevant to the pathophysiology of the metabolic syndromethe pathophysiology of the metabolic syndrome脂肪组织脂肪组织新的内分泌器官新的内分泌器官ResistinResistin(2001)(2001)Adipo
2、nectinAdiponectin(1991)(1991)Vitronectin(2000)Vitronectin(2000)PPARsOmentinOmentin(2003)(2003)病因病因/机理机理遗传因素遗传因素遗传因素遗传因素环境因素环境因素环境因素环境因素ACACACAC肥大肥大肥大肥大/增殖增殖增殖增殖AdipocytokinesAdipocytokinesAdipocytokinesAdipocytokinesTNF-TNF-TNF-TNF-NEFANEFANEFANEFAIL-6IL-6IL-6IL-6ResistinResistinResistinResistinPAI-
3、1PAI-1PAI-1PAI-1 APAPVFVF(omental F)(omental F)apM 1apM 1OmentinOmentinMSIRIGT高血压高血压血脂异常血脂异常DC,2003,26:2442AC/IRAC/IR新概念新概念 ACAC致致m IRm IR AC AC致致L L IR IR AC AC致心肌致心肌IRIR AC AC致胰致胰IRIR AC AC致内皮致内皮IRIR AC AC致致ACAC自身自身IRIRTNF-TNF-妨碍肌、脂妨碍肌、脂妨碍肌、脂妨碍肌、脂InsInsInsIns信号转导信号转导信号转导信号转导 Glut4 Glut4 Glut4 Glut
4、4表达、转位表达、转位表达、转位表达、转位 肌、脂肌、脂肌、脂肌、脂G G G G摄取摄取摄取摄取糖原合成糖原合成糖原合成糖原合成 脂解,脂解,脂解,脂解,NEFANEFANEFANEFA Adipostat Adipostat Adipostat Adipostat,TNF-/leptin,TNF-/leptin,TNF-/leptin,TNF-/leptin,限制限制限制限制ACACACAC体体体体积增大积增大积增大积增大 促进细胞调亡,肿瘤恶病质有关促进细胞调亡,肿瘤恶病质有关促进细胞调亡,肿瘤恶病质有关促进细胞调亡,肿瘤恶病质有关 IL-6 IL-6 IL-6 IL-6IL-6IL-6
5、,(来源,(来源MPMP,LCLC,ACAC)The most endocrine CK The most endocrine CK The most endocrine CK The most endocrine CKTNF-CRPCRPCRPCRPOB-low grade inflammatory stateAsOB-low grade inflammatory stateAsOB-low grade inflammatory stateAsOB-low grade inflammatory stateAsHPA AXISHPA AXISACACIL-6IL-6(一)(一)(一)(一)F
6、F脂肝、脂脑对话脂肝、脂脑对话脂肝、脂脑对话脂肝、脂脑对话肝肝肝肝TG TG TG TG 脂解脂解脂解脂解OPOPOPOPE E E E2 2 2 2()()Resistin(2001)Resistin(2001)ChCh1919(人)(人)仅于仅于WATWAT特异表达特异表达 抗抗抗抗resistin-Abresistin-Abresistin-Abresistin-Ab处理,处理,处理,处理,In-Med-GIn-Med-GIn-Med-GIn-Med-G摄取摄取摄取摄取,BG,BG,BG,BG TZD TZD(PPAR-PPAR-配基)下调配基)下调resistinresistin肥胖肥
7、胖肥胖肥胖ResistinDM2ResistinDM2ResistinDM2ResistinDM2SISIIGTIGTDM2DM2肥胖肥胖肥胖肥胖ResistinDM2ResistinDM2ResistinDM2ResistinDM2SISIIGTIGTDM2DM2PPAR-PPAR-TZDTZDLink btw ob&DM2网膜素网膜素网膜素网膜素又一新发现的脂肪激素又一新发现的脂肪激素又一新发现的脂肪激素又一新发现的脂肪激素(2003)(2003)313 A.A313 A.A作用:作用:作用:作用:v 促进促进促进促进AC InsAC Ins介导的介导的介导的介导的GG运转运转运转运转v
8、AktAkt/PKB/PKBv 调节能量代谢及胰岛素信号调节能量代谢及胰岛素信号调节能量代谢及胰岛素信号调节能量代谢及胰岛素信号Ibid 2003 52(s1):A1Ibid 2003 52(s1):A1NEFA-NEFA-信号分子信号分子FAFAGGGlutGlut4 4 mmHGP/HPOHGP/HPOInInL LB.cB.cB.cB.c E.c E.c NONO,血管舒张,血管舒张,血管舒张,血管舒张 Ectopic deposition of lipidsEctopic deposition of lipids NEFA-OX FFA Reesterificationnon-ACNE
9、FA-OX FFA Reesterificationnon-ACNEFA-OX FFA Reesterificationnon-ACNEFA-OX FFA Reesterificationnon-ACmL L、cE.cIR、c FA Spilloverc FA Spillover Lipotoxicity of non-ox metabolic pathway Lipotoxicity of non-ox metabolic pathway Lipotoxicity of non-ox metabolic pathway Lipotoxicity of non-ox metabolic pat
10、hway Leptin resistanceLeptin resistanceLeptin resistanceLeptin resistance对对对对 、c c c c 保护作用保护作用保护作用保护作用Fatty Acyl coAFatty Acyl coATGTGMembraneMembraneDisruptionDisruption(Detergent(Detergent)CeramideCeramide iNOSiNOS ApoptosisApoptosisLipidLipidPeroxidationPeroxidation、c FA Spilloverc FA Spillover
11、Lipotoxicity of non-ox metabolic pathway Lipotoxicity of non-ox metabolic pathway Lipotoxicity of non-ox metabolic pathway Lipotoxicity of non-ox metabolic pathway Leptin resistanceLeptin resistanceLeptin resistanceLeptin resistance对对对对 、c c c c 保护作用保护作用保护作用保护作用Fatty Acyl coAFatty Acyl coATGTGMembra
12、neMembraneDisruptionDisruption(Detergent(Detergent)CeramideCeramide iNOSiNOS ApoptosisApoptosisLipidLipidPeroxidationPeroxidationTZDTZDAdiponectin mutation and multimerizationArg 112 cys Ile 164 ThrArg 112 cys Ile 164 ThrTrimerTrimerGly 84 Arg Gly 90 SerGly 84 Arg Gly 90 Sermultimermultimer Adiponec
13、tin AdiponectinDMDMWaki H,et al,Diabetes,2003,52(s1):A1Waki H,et al,Diabetes,2003,52(s1):A1APM 1 3qAPM 1 3qAPM 1 3qAPM 1 3q27272727(Acrp 30)(Acrp 30)(Acrp 30)(Acrp 30)(分化分化分化分化ACACACAC特异表达特异表达特异表达特异表达)FFA oXFFA oXFFA oXFFA oXBGBGBGBGMS DM obMS DM obAPM1 3q27APM1 3q27(单信型(单信型(单信型(单信型Promotor/ExonProm
14、otor/Exon单核苷多态性)单核苷多态性)单核苷多态性)单核苷多态性)MSMS(IRIR)DMDM2 2ObFroguel P.DGAT2-5LeptinDGAT2-5Leptin抵抗抵抗IRS2 ObIRS2 ObIRS2 ObIRS2 Ob,LPLPLPLP抵抗,抵抗,抵抗,抵抗,ACACACAC肥大肥大肥大肥大DGAT2 Gene DGAT2 Gene DGAT2 Gene DGAT2 Gene 上调上调上调上调WATWATWATWATDGAT1 Gene DGAT1 Gene DGAT1 Gene DGAT1 Gene 下调下调下调下调WATWATWATWATDGAT2 Gene
15、DGAT2 Gene DGAT2 Gene DGAT2 Gene 表达表达表达表达LP ACLP ACLP ACLP AC肥大肥大肥大肥大通过两条途径通过两条途径通过两条途径通过两条途径 肥胖肥胖肥胖肥胖DM2DM2DM2DM2相关的机理相关的机理相关的机理相关的机理ACAdipocytokinesACAdipocytokinesACAdipocytokinesACAdipocytokinesIRIRIRIR糖、脂代谢异常糖、脂代谢异常糖、脂代谢异常糖、脂代谢异常、c c c c功能障碍功能障碍功能障碍功能障碍IGTDM2IGTDM2IGTDM2IGTDM2糖尿病脂代谢异常糖尿病脂代谢异常FF
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