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
目的基于分子对接技术探究天花粉活性成分与2型糖尿病(type 2 diabetes mellitus,T2DM)靶点的相互作用。方法通过中药系统药理学数据库与分析平台(Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform,T...目的基于分子对接技术探究天花粉活性成分与2型糖尿病(type 2 diabetes mellitus,T2DM)靶点的相互作用。方法通过中药系统药理学数据库与分析平台(Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform,TCMSP)和SwissTargetPrediction数据库获得天花粉活性成分及作用靶点,在GeneCards和DisGeNET数据库中获得T2DM靶点。将天花粉活性成分靶点与T2DM靶点取交集,获取药物-疾病共有靶点,导入DAVID数据库进行基因本体(gene ontology,GO)和京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)通路富集分析。构建共有靶点的蛋白质互作网络(protein-protein interaction networks,PPI),分析得出关键靶点。最后,利用Sybyl软件进行分子对接,验证活性成分与关键靶点相互作用。结果天花粉活性成分为仙人掌甾醇(schottenol)和菠菜甾醇(spinasterol),获得药物-疾病共有靶点21个。PPI、GO和KEGG富集分析表明,天花粉可能作用于过氧化物酶体增殖物激活受体(peroxisome proliferator-activated receptors,PPARs),进而通过PPAR信号通路和胰岛素抵抗信号通路调节糖脂代谢。分子对接表明,天花粉活性成分仙人掌甾醇和菠菜甾醇均与关键靶点过氧化物酶体增殖物激活受体γ(PPARγ)有较强的结合作用。结论天花粉活性成分仙人掌甾醇和菠菜甾醇,可能通过作用于T2DM靶点PPARγ改善胰岛素抵抗。展开更多
Background Some single nucleotide polymorphisms （SNPs） in the peroxisome proliferator-activated receptor-y coactivator （PGC）-1α gene have been reported to be associated with type 2 diabetes in different populatio...Background Some single nucleotide polymorphisms （SNPs） in the peroxisome proliferator-activated receptor-y coactivator （PGC）-1α gene have been reported to be associated with type 2 diabetes in different populations, and studies on Chinese patients yielded controversial results. The objective of this case-control study was to explore the relationship between SNPs of PGC-1α and type 2 diabetes in the southern Chinese population and to determine whether the common variants： Gly482Ser and Thr394Thr, in the PGC-1α gene have any impacts on interaction with myocyte enhancer factor （MEF） 2C. Methods The SNPs in all exons of the PGC-1α gene was investigated in 50 type 2 diabetic patients using polymerase chain reaction-single strand conformational polymorphism （PCR-SSCP） and direct sequencing. Thereafter, 263 type 2 diabetic patients and 282 healthy controls were genotyped by polymerase chain reaction-restriction fragment length polymorphism （PCR-RFLP）. A bacterial two-hybrid system and site-directed mutagenesis were used to investigate whether Gly482Ser and Thr394Thr variants in the PGC-1α gene alter the interaction with MEF2C. Results Three frequent SNPs （Thr394Thr, Gly482Ser and Thr528Thr） were found in exons of the PGC-1α gene. Only the Gly482Ser variant had a different distribution between diabetic patients and healthy subjects, with the 482Ser allele more frequent in patients than in controls （40.1% vs 29.3%, P〈0.01）. Even in controls, the 482Ser（A） carriers were more likely to have higher levels of total cholesterol and low-density lipoprotein cholesterol than the 482Gly（G） carriers. The 394A-482G-528A haplotype was associated with protection from diabetes, while the 394A-482A-528A was associated with the susceptibility to diabetes. The bacterial two-hybrid system and site-directed mutagenesis revealed that the 482Ser variant was less efficient than the 482Gly variant to interact with MEF2C, whereas the 394Thr （A） had a synergic effect on the interaction between 482Ser variant and MEF2C. Conclusions The results suggested that the 482Ser variant of PGC-1α conferred the susceptibility to type 2 diabetes in the southern Chinese population. The underlying mechanism may be attributable, at least in part, to the altered interaction between the different variants （Gly482Ser, Thr394Thr） in the PGC-1α gene and MEF2C.展开更多
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.
文摘目的基于分子对接技术探究天花粉活性成分与2型糖尿病(type 2 diabetes mellitus,T2DM)靶点的相互作用。方法通过中药系统药理学数据库与分析平台(Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform,TCMSP)和SwissTargetPrediction数据库获得天花粉活性成分及作用靶点,在GeneCards和DisGeNET数据库中获得T2DM靶点。将天花粉活性成分靶点与T2DM靶点取交集,获取药物-疾病共有靶点,导入DAVID数据库进行基因本体(gene ontology,GO)和京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)通路富集分析。构建共有靶点的蛋白质互作网络(protein-protein interaction networks,PPI),分析得出关键靶点。最后,利用Sybyl软件进行分子对接,验证活性成分与关键靶点相互作用。结果天花粉活性成分为仙人掌甾醇(schottenol)和菠菜甾醇(spinasterol),获得药物-疾病共有靶点21个。PPI、GO和KEGG富集分析表明,天花粉可能作用于过氧化物酶体增殖物激活受体(peroxisome proliferator-activated receptors,PPARs),进而通过PPAR信号通路和胰岛素抵抗信号通路调节糖脂代谢。分子对接表明,天花粉活性成分仙人掌甾醇和菠菜甾醇均与关键靶点过氧化物酶体增殖物激活受体γ(PPARγ)有较强的结合作用。结论天花粉活性成分仙人掌甾醇和菠菜甾醇,可能通过作用于T2DM靶点PPARγ改善胰岛素抵抗。
基金supported by grants from The National Natural Science Foundation of China(30971268)Scientific Research Foundation for Returned Overseas Chinese Scholars from Ministry of Education[(2008)890]+1 种基金University of South China(5-XQD-2007-7)Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province~~
文摘Background Some single nucleotide polymorphisms （SNPs） in the peroxisome proliferator-activated receptor-y coactivator （PGC）-1α gene have been reported to be associated with type 2 diabetes in different populations, and studies on Chinese patients yielded controversial results. The objective of this case-control study was to explore the relationship between SNPs of PGC-1α and type 2 diabetes in the southern Chinese population and to determine whether the common variants： Gly482Ser and Thr394Thr, in the PGC-1α gene have any impacts on interaction with myocyte enhancer factor （MEF） 2C. Methods The SNPs in all exons of the PGC-1α gene was investigated in 50 type 2 diabetic patients using polymerase chain reaction-single strand conformational polymorphism （PCR-SSCP） and direct sequencing. Thereafter, 263 type 2 diabetic patients and 282 healthy controls were genotyped by polymerase chain reaction-restriction fragment length polymorphism （PCR-RFLP）. A bacterial two-hybrid system and site-directed mutagenesis were used to investigate whether Gly482Ser and Thr394Thr variants in the PGC-1α gene alter the interaction with MEF2C. Results Three frequent SNPs （Thr394Thr, Gly482Ser and Thr528Thr） were found in exons of the PGC-1α gene. Only the Gly482Ser variant had a different distribution between diabetic patients and healthy subjects, with the 482Ser allele more frequent in patients than in controls （40.1% vs 29.3%, P〈0.01）. Even in controls, the 482Ser（A） carriers were more likely to have higher levels of total cholesterol and low-density lipoprotein cholesterol than the 482Gly（G） carriers. The 394A-482G-528A haplotype was associated with protection from diabetes, while the 394A-482A-528A was associated with the susceptibility to diabetes. The bacterial two-hybrid system and site-directed mutagenesis revealed that the 482Ser variant was less efficient than the 482Gly variant to interact with MEF2C, whereas the 394Thr （A） had a synergic effect on the interaction between 482Ser variant and MEF2C. Conclusions The results suggested that the 482Ser variant of PGC-1α conferred the susceptibility to type 2 diabetes in the southern Chinese population. The underlying mechanism may be attributable, at least in part, to the altered interaction between the different variants （Gly482Ser, Thr394Thr） in the PGC-1α gene and MEF2C.
