目的研究当归芍药散对载脂蛋白E基因敲除(ApoE^(-/-))小鼠主动脉粥样硬化(atherosclerosis,As)斑块的干预作用及DNA甲基转移酶1(DNMT1)和PPAR-γ表达的影响。方法将30只8周龄雄性ApoE^(-/-)小鼠西方类型膳食喂养9周,随机分为模型组、立...目的研究当归芍药散对载脂蛋白E基因敲除(ApoE^(-/-))小鼠主动脉粥样硬化(atherosclerosis,As)斑块的干预作用及DNA甲基转移酶1(DNMT1)和PPAR-γ表达的影响。方法将30只8周龄雄性ApoE^(-/-)小鼠西方类型膳食喂养9周,随机分为模型组、立普妥组(阳性对照组)和当归芍药散组(n=10),药物干预9周后,检测血清总胆固醇(total cholesterol,TC)、甘油三酯(triglyceride,TG)、低密度脂蛋白胆固醇(low density lipoprotein cholesterol,LDL-C)、高密度脂蛋白胆固醇(high density lipoprotein cholesterol,HDL-C)、血清DNA甲基化水平及DNMTs水平。行苏木素-伊红染色(hematoxylin and eosin staining,HE),采用IPP图像分析软件测量小鼠主动脉As斑块面积。免疫组化法检测各组小鼠主动脉As斑块内DNA甲基化转移酶1(DNMT1)和过氧化物酶体增殖物活化受体γ(PPARγ)的表达。结果与模型组相比,当归芍药散组和立普妥组小鼠血清TC、TG水平明显降低(P<0.05),当归芍药散组小鼠血清HDL-C水平明显升高(P<0.05)。与模型组相比,当归芍药散组小鼠主动脉As斑块面积显著降低(P<0.01),当归芍药散组小鼠主动脉斑块内DNMT1表达显著降低(P<0.05),PPARγ表达显著升高(P<0.05)。结论当归芍药散可改善As小鼠的血脂水平,减少As斑块面积,具有明确的抗As作用,其机制可能与抑制As小鼠血清甲基化水平和DNMTs水平,促进As小鼠主动脉斑块内PPARγ表达和抑制斑块内DNMT1表达有关。展开更多
目的研究姜黄素对高脂诱导的非酒精性脂肪性肝病(NAFLD)中肝过氧化物酶体增殖物激活受体γ(PPAR-γ)和核因子κB(NF-κB)p65 m RNA及蛋白表达的影响。方法建立大鼠NAFLD模型,按照随机化原则分为5组:正常组、模型组、低剂量治疗组、中剂...目的研究姜黄素对高脂诱导的非酒精性脂肪性肝病(NAFLD)中肝过氧化物酶体增殖物激活受体γ(PPAR-γ)和核因子κB(NF-κB)p65 m RNA及蛋白表达的影响。方法建立大鼠NAFLD模型,按照随机化原则分为5组:正常组、模型组、低剂量治疗组、中剂量治疗组、高剂量治疗组。正常组给予普通饮食,其余4组给予高脂饮食,同时分别用羧甲基纤维素钠(CMC)和低、中、高剂量姜黄素进行治疗。持续治疗12周后,处死各组大鼠并进行处理分析。血清生物化学方法检测大鼠血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)、甘油三酯(TG)和总胆固醇(TC)的含量;HE染色对大鼠肝组织进行病理学观察;免疫组织化学检测大鼠肝组织PPAR-γ和NF-κB p65蛋白的表达情况;RT-PCR检测PPAR-γ和NF-κB p65 m RNA的表达情况。结果治疗组(低、中、高剂量)大鼠血清中ALT、AST、TG、TC含量较模型组明显降低(P<0.05)。治疗组(低、中、高剂量)大鼠肝组织的脂肪变性程度较模型组明显减轻。与正常组比较,模型组肝组织PPAR-γm RNA及蛋白的表达水平均明显降低(P<0.05),而NF-κB p65 m RNA及蛋白的表达水平均明显升高(P<0.05)。与模型组比较,治疗组(低、中、高剂量)大鼠肝组织PPAR-γ的表达明显增加(P<0.05),PPAR-γ的表达水平以高剂量治疗组升高更加明显(P<0.01);与模型组相比,治疗组(低、中、高剂量)大鼠肝组织NF-κB p65的表达显著减少(P<0.05),NF-κB p65的表达水平以高剂量治疗组降低更加明显(P<0.01)。结论姜黄素可明显减轻高脂诱导的大鼠NAFLD肝组织的脂肪变性和炎性反应,其抗脂肪变性和抗炎的机制可能与姜黄素激活PPAR-γ的表达,从而抑制NF-κB p65的活性有关。PPAR-γ和NF-κB p65的表达参与了NAFLD的发生发展,控制这些信号分子的表达可能是姜黄素治疗NAFLD的重要机制之一。展开更多
Objective To study the effect of β3 adrenergic receptor (β3AR) Trp64Arg and peroxisome proliferator activated receptor gamma 2 (PPAR72) Prol2Ala polymorphisms on insulin resistance. Methods One hundred and eight...Objective To study the effect of β3 adrenergic receptor (β3AR) Trp64Arg and peroxisome proliferator activated receptor gamma 2 (PPAR72) Prol2Ala polymorphisms on insulin resistance. Methods One hundred and eight dizygotic twin pairs were enrolled in this study. Microsatellite polymorphism was used to diagnose zygosity of twins. Insulin sensitivity was estimated with logarithm transformed homeostasis model assessment (HOMA). PCR-RFLP analysis was performed to detect the variants. As a supplement to the sib-pair method, identity by state (IBS) was used to analyze the association of polymorphisms with insulin sensitivity. Results The genotype frequencies of Trp64Trg, Trp64Arg, and Arg64Arg were 72.3%, 23.8%, and 3.9%, respectively, while the genotype frequencies of Pro12Pro, Pro12Ala, and Ala12Ala were 89.9%, 9.6%, and 0.5%, respectively. For β3AR Trp64Arg the interclass co-twin correlations of Waist-to-hip ratio (WHR), blood glucose (GLU), and insulin (INS), homeostasis model assessment insulin resistance index (HOMA-IR) of the twin pairs sharing 2 alleles of IBS were greater than those sharing 0-1 allele of IBS, and HOMA4R had statistic significance. For PPAR3t2 Prol2Ala most traits of twin pairs sharing 2 alleles of IBS had greater correlations and statistic significance in body mass index (BMI), WHR, percent of body fat (PBF) and GLU, but there were low correlations of either insulin or HOMA-IR of twin pairs sharing 1 or 2 alleles of IBS. The combined effects of the two variations showed less squared significant twin-pair differences of INS and HOMA-IR among twins sharing 4 alleles of IBS. Condusions β3AR Trp64Arg and PPAR),2 Pro 12Ala polymorphisms might be associated with insulin resistance and obesity, and there might be slight synergistic effects between this two gene loci, and further studies are necessary to confirm this finding.展开更多
目的观察过氧化物酶体增殖激活受体γ(PPARγ)的配体曲格列酮(troglitazone,TGZ)对胃癌SGC-7901细胞凋亡的影响。方法体外培养人胃癌SGC-7901细胞,SGC-7901细胞分为对照组和曲格列酮不同浓度(5、10、15、20μmol/L)加药组,应用流式细胞...目的观察过氧化物酶体增殖激活受体γ(PPARγ)的配体曲格列酮(troglitazone,TGZ)对胃癌SGC-7901细胞凋亡的影响。方法体外培养人胃癌SGC-7901细胞,SGC-7901细胞分为对照组和曲格列酮不同浓度(5、10、15、20μmol/L)加药组,应用流式细胞仪检测曲格列酮不同浓度对胃癌SGC-7901细胞凋亡率的影响;RT-PCR及W estern b lot方法观察PPARγ、p53的mRNA及蛋白表达变化。结果曲格列酮可诱导胃癌SGC-7901细胞凋亡,凋亡率与浓度呈正相关;曲格列酮干预后,p53的mRNA及蛋白在胃癌SGC-7901细胞中表达上调,而PPARγ的mRNA及蛋白表达水平无明显改变。结论曲格列酮依赖激活PPARγ能在体外诱导胃癌细胞凋亡,其机制可能是通过上调抑癌基因p53表达而实现,提示PPARγ可能是胃癌治疗的一个新分子靶点。展开更多
文摘目的研究当归芍药散对载脂蛋白E基因敲除(ApoE^(-/-))小鼠主动脉粥样硬化(atherosclerosis,As)斑块的干预作用及DNA甲基转移酶1(DNMT1)和PPAR-γ表达的影响。方法将30只8周龄雄性ApoE^(-/-)小鼠西方类型膳食喂养9周,随机分为模型组、立普妥组(阳性对照组)和当归芍药散组(n=10),药物干预9周后,检测血清总胆固醇(total cholesterol,TC)、甘油三酯(triglyceride,TG)、低密度脂蛋白胆固醇(low density lipoprotein cholesterol,LDL-C)、高密度脂蛋白胆固醇(high density lipoprotein cholesterol,HDL-C)、血清DNA甲基化水平及DNMTs水平。行苏木素-伊红染色(hematoxylin and eosin staining,HE),采用IPP图像分析软件测量小鼠主动脉As斑块面积。免疫组化法检测各组小鼠主动脉As斑块内DNA甲基化转移酶1(DNMT1)和过氧化物酶体增殖物活化受体γ(PPARγ)的表达。结果与模型组相比,当归芍药散组和立普妥组小鼠血清TC、TG水平明显降低(P<0.05),当归芍药散组小鼠血清HDL-C水平明显升高(P<0.05)。与模型组相比,当归芍药散组小鼠主动脉As斑块面积显著降低(P<0.01),当归芍药散组小鼠主动脉斑块内DNMT1表达显著降低(P<0.05),PPARγ表达显著升高(P<0.05)。结论当归芍药散可改善As小鼠的血脂水平,减少As斑块面积,具有明确的抗As作用,其机制可能与抑制As小鼠血清甲基化水平和DNMTs水平,促进As小鼠主动脉斑块内PPARγ表达和抑制斑块内DNMT1表达有关。
文摘目的研究姜黄素对高脂诱导的非酒精性脂肪性肝病(NAFLD)中肝过氧化物酶体增殖物激活受体γ(PPAR-γ)和核因子κB(NF-κB)p65 m RNA及蛋白表达的影响。方法建立大鼠NAFLD模型,按照随机化原则分为5组:正常组、模型组、低剂量治疗组、中剂量治疗组、高剂量治疗组。正常组给予普通饮食,其余4组给予高脂饮食,同时分别用羧甲基纤维素钠(CMC)和低、中、高剂量姜黄素进行治疗。持续治疗12周后,处死各组大鼠并进行处理分析。血清生物化学方法检测大鼠血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)、甘油三酯(TG)和总胆固醇(TC)的含量;HE染色对大鼠肝组织进行病理学观察;免疫组织化学检测大鼠肝组织PPAR-γ和NF-κB p65蛋白的表达情况;RT-PCR检测PPAR-γ和NF-κB p65 m RNA的表达情况。结果治疗组(低、中、高剂量)大鼠血清中ALT、AST、TG、TC含量较模型组明显降低(P<0.05)。治疗组(低、中、高剂量)大鼠肝组织的脂肪变性程度较模型组明显减轻。与正常组比较,模型组肝组织PPAR-γm RNA及蛋白的表达水平均明显降低(P<0.05),而NF-κB p65 m RNA及蛋白的表达水平均明显升高(P<0.05)。与模型组比较,治疗组(低、中、高剂量)大鼠肝组织PPAR-γ的表达明显增加(P<0.05),PPAR-γ的表达水平以高剂量治疗组升高更加明显(P<0.01);与模型组相比,治疗组(低、中、高剂量)大鼠肝组织NF-κB p65的表达显著减少(P<0.05),NF-κB p65的表达水平以高剂量治疗组降低更加明显(P<0.01)。结论姜黄素可明显减轻高脂诱导的大鼠NAFLD肝组织的脂肪变性和炎性反应,其抗脂肪变性和抗炎的机制可能与姜黄素激活PPAR-γ的表达,从而抑制NF-κB p65的活性有关。PPAR-γ和NF-κB p65的表达参与了NAFLD的发生发展,控制这些信号分子的表达可能是姜黄素治疗NAFLD的重要机制之一。
基金This study was supported by the National Natural Science Foundation of China (30371223)the Major State Basic Research Development Program of China (2001CB510310).
文摘Objective To study the effect of β3 adrenergic receptor (β3AR) Trp64Arg and peroxisome proliferator activated receptor gamma 2 (PPAR72) Prol2Ala polymorphisms on insulin resistance. Methods One hundred and eight dizygotic twin pairs were enrolled in this study. Microsatellite polymorphism was used to diagnose zygosity of twins. Insulin sensitivity was estimated with logarithm transformed homeostasis model assessment (HOMA). PCR-RFLP analysis was performed to detect the variants. As a supplement to the sib-pair method, identity by state (IBS) was used to analyze the association of polymorphisms with insulin sensitivity. Results The genotype frequencies of Trp64Trg, Trp64Arg, and Arg64Arg were 72.3%, 23.8%, and 3.9%, respectively, while the genotype frequencies of Pro12Pro, Pro12Ala, and Ala12Ala were 89.9%, 9.6%, and 0.5%, respectively. For β3AR Trp64Arg the interclass co-twin correlations of Waist-to-hip ratio (WHR), blood glucose (GLU), and insulin (INS), homeostasis model assessment insulin resistance index (HOMA-IR) of the twin pairs sharing 2 alleles of IBS were greater than those sharing 0-1 allele of IBS, and HOMA4R had statistic significance. For PPAR3t2 Prol2Ala most traits of twin pairs sharing 2 alleles of IBS had greater correlations and statistic significance in body mass index (BMI), WHR, percent of body fat (PBF) and GLU, but there were low correlations of either insulin or HOMA-IR of twin pairs sharing 1 or 2 alleles of IBS. The combined effects of the two variations showed less squared significant twin-pair differences of INS and HOMA-IR among twins sharing 4 alleles of IBS. Condusions β3AR Trp64Arg and PPAR),2 Pro 12Ala polymorphisms might be associated with insulin resistance and obesity, and there might be slight synergistic effects between this two gene loci, and further studies are necessary to confirm this finding.
文摘目的观察过氧化物酶体增殖激活受体γ(PPARγ)的配体曲格列酮(troglitazone,TGZ)对胃癌SGC-7901细胞凋亡的影响。方法体外培养人胃癌SGC-7901细胞,SGC-7901细胞分为对照组和曲格列酮不同浓度(5、10、15、20μmol/L)加药组,应用流式细胞仪检测曲格列酮不同浓度对胃癌SGC-7901细胞凋亡率的影响;RT-PCR及W estern b lot方法观察PPARγ、p53的mRNA及蛋白表达变化。结果曲格列酮可诱导胃癌SGC-7901细胞凋亡,凋亡率与浓度呈正相关;曲格列酮干预后,p53的mRNA及蛋白在胃癌SGC-7901细胞中表达上调,而PPARγ的mRNA及蛋白表达水平无明显改变。结论曲格列酮依赖激活PPARγ能在体外诱导胃癌细胞凋亡,其机制可能是通过上调抑癌基因p53表达而实现,提示PPARγ可能是胃癌治疗的一个新分子靶点。