中国汉族人群Calpain-10基因UCSNP43多态性与2型糖尿病相关性的meta分析

对中国汉族人群Calpain-10基因UCSNP43位点多态性与2型糖尿病的相关性进行meta分析.Calpain-10基因UCSNP43位点G等位基因、GG基因型可能是中国汉族人群2型糖尿病的危险因子;A等位基因、GA基因型可能为保护因子.     

中国汉族人群Calpain-10基因UCSNP43多态性与2型糖尿病相关性的meta分析

对中国汉族人群Calpain-10基因UCSNP43位点多态性与2型糖尿病的相关性进行meta分析.Calpain-10基因UCSNP43位点G等位基因、GG基因型可能是中国汉族人群2型糖尿病的危险因子;A等位基因、GA基因型可能为保护因子.     

中国汉族人群Calpain-10基因UCSNP43多态性与2型糖尿病相关性的meta分析

对中国汉族人群Calpain-10基因UCSNP43位点多态性与2型糖尿病的相关性进行meta分析.Calpain-10基因UCSNP43位点G等位基因、GG基因型可能是中国汉族人群2型糖尿病的危险因子;A等位基因、GA基因型可能为保护因子.     

Calpain 1 O基因多态性与中国人2型糖尿病遗传易感性的相关性研究

目的 了解Calpain 10基因对中国汉族人2型糖尿病遗传易感性的影响。方法 采用病例对照研究方法：以聚合酶链式反应－限制性内切酶长度多态性（PCR－RFLP）技术，对211例2型糖尿病患者及127例正常对照Calpain 10基因SNP43及SNP19多态性进行基因分型。结果 同对照组相比，SNP43的G等位基因频率在2型糖尿病人群中显著升高（91．9％ vs 85.8%,P=0.01)。但SNP19位点等位基因频率在上述两组中的频率分布无显著差异。此外，本研究还观察到在正常对照组中，SNP43GG基因型与体重指数和腰－臂围比值增加相关。结论 Calpain 10基因SNP43位点G等位基因可直接或与其他糖尿病基因相互作用决定汉族人2型糖尿病的遗传易感性。     

Calpain-10基因多态性与糖耐量异常状态、胰岛素分泌及胰岛素敏感性的相关性

目的观察染色体2q37.3NIDDM1位点的calpain-10基因(CAPN-10)单核苷酸多态性(SNP)-UCSNP43与糖耐量异常及其中间性状的关系.方法320例无亲缘关系上海地区中国人.其中正常糖耐量(NGT)者148例、糖耐量减损(IGT)者44例及2型糖尿病(DM)者128例.口服75克葡萄糖后0、30、60、120及180分钟测血浆糖、胰岛素、C肽及游离脂肪酸.用HOMA及30分增值公式估测组织胰岛素敏感性及β细胞胰岛素分泌情况.用DNA直接测序检测CAPN-10的UCSNP43的基因型.结果(1)本组中国人的CAPN-10UCSNP43GG、GA、AA基因型分布为0.80、0.18及0.02.G等位基因频率为0.89,显著高于文献报道的白种人、Pima印地安人及美籍墨西哥人的G频率(P均＜0.0001),而与日本人相近;(2)CAPN-10UCSNP43与糖耐量异常(IGT及/或2型DM)不相关;(3)NGT者中CAPN-10UCSNP43GA+AA型亚组组织胰岛素敏感性低于GG亚组[HOMA-IR的P=0.006,年龄、性别、体重指数(BMI)、腰围校正后P=0.017].糖负荷后0、60、120、180分钟胰岛素水平及负荷后曲线下面积高于GG亚组(P分别为0.019、0.016、0.007、0.039及0.009,年龄、性别、BMI、腰围及相应时间血糖值校正后P分别为0.026、0.024、0.020、0.112及0.011).结论CAPN-10UCSNP43与组织胰岛素敏感性及糖负荷过程中胰岛素水平相关.     

湖北汉族人2型糖尿病与Calpain10基因多态性的相关研究

目的探讨Calpain10基因对湖北汉族人2型糖尿病遗传易感性的影响。方法采用病例对照研究,以聚合酶链式反应联合限制性内切酶的多态性（PCR—RFLP）分子生物学技术,选择262例2型糖尿病患者作为试验组和262例血糖正常者为对照组,对其Calpainl0基因上的SNP43及SNPl9位点多态性进行分析。结果在2型糖尿病人群中,SNP43的G等位基因频率,与对照组相比（93．8％比79．97％）,差异有统计学意义（P〈0．05）。而SNPl9位点等位基因频率在2组中的频率分布差异无统计学意义（P〉0．05）。此外,在本研究对照组中,SNP43GG基因型与体质量指数和腰一臀围比值增加相关。结论SNP43位点等位基因G在Calpain10基因中可直接或与其他糖尿病基因相互作用决定湖北汉族人2型糖尿病的遗传易感性。     

ADAM33基因Q-1、T2位点基因多态性与新疆维吾尔族人群慢性阻塞性肺疾病的相关性

目的探讨ADAM33基因的Q-1、T2位点单核苷酸多态性(SNP)与新疆维吾尔族人群慢性阻塞性肺疾病(COPD)发病的相关性。方法对107例新疆维吾尔族COPD患者和140例新疆维吾尔族健康体检者,采用聚合酶链反应-限制性片段长度多态性方法(PCR-RFLP)分析ADAM33基因Q-1位点和T2位点的基因表达多态性。结果 (1)与对照组比较,COPD组T2位点基因型分布和等位基因频率分布差异有统计学意义(均P<0.05)。相对于GG基因型,AG+AA基因型能够降低COPD发生的风险〔OR(95%CI):0.536(0.293⁰.983)〕。(2)单体型H4(GG)、单倍体H3(GA)和COPD存在相关性(均P<0.05)。(3)在COPD组T2位点GG基因型、AG+AA基因型的第一秒用力呼气容积占用力肺活量的百分比(FEV1/FVC)、第一秒用力呼气容积占预计值的百分比(FEV1占预计值)差异无统计学意义(均P>0.05)。结论在新疆维吾尔族人群中,ADAM33基因T2位点基因多态性可能与COPD发病相关。     

PPIA基因rs6850位点多态性与冠心病合并2型糖尿病的关系

目的 探讨PPIA基因rs6850位点多态性与冠心病（CAD）患者合并2型糖尿病（T2DM）的关系。方法选取CAD、CAD合并T2DM患者各100例,采集患者静脉血,采用直接测序法检测PPIA基因rs6850位点的基因多态性。比较两组基因型和等位基因频率分布情况,对比不同基因型患者的临床资料,采用Logistic回归分析冠心病患者发生2型糖尿病的影响因素。结果 PPIA基因rs6850位点基因型、等位基因、显性模型和隐性模型在CAD+T2DM组和CAD组间的分布差异无统计学意义（P均>0.05）。GA基因型携带者BMI较AA、GG基因型携带者升高（P均<0.05）。调整混杂因素后,Logistic回归分析显示,GG、GA、AA三种基因型均不是冠心病患者发生2型糖尿病的影响因素（P均>0.05）。结论 PPIA基因rs6850位点多态性与冠心病合并2型糖尿病患者的遗传易感性无关。     

Calpain-10基因SNP43单核苷酸多态性与2型糖尿病的相关性研究

采用错配聚合酶链反应技术,对128例2型糖尿病患者(T2DM组)和102例健康者(对照组)的Cal-pain-10基因SNP43单核苷酸多态性进行基因分型,并测定其体质量指数(BMI)、腰围/臀围、空腹血糖、甘油三酯和胆固醇.结果显示,两组Capain-10基因SNP43等位基因G、A频率无统计学差异(P>0.05);两组Calpain-10基因SNP43多态性中,GG型与GA AA型基因者的上述指标比较均无统计学差异(P均>0.05);对照组基因GA AA型者的甘油三酯较GG型者高(P<0.05).认为Calpain-10基因SNP43单核苷酸多态性可能与T2DM的遗传易感性无相关性.     

甘露聚糖结合凝集素基因A/B位点与新疆维吾尔族结核病的相关性研究

目的 探讨甘露聚糖结合凝集素（mannan-binding lectin,MBL）基因的多态性是否与新疆维吾尔族人群结核病发病相关。 方法 通过使用引物序列特异性PCR(SSP-PCR)的方法分别对226例新疆维吾尔族活动性肺结核患者（简称病例组）及231例有结核分枝杆菌接触史的新疆同民族健康者（简称对照组）进行MBL基因的A/B多态性位点进行基因分型,统计学分析采用病例对照分析研究不同基因型与新疆维吾尔族结核病易感性的关系。 结果 在病例组中,MBL基因A/B位点 AA 基因型106例(占46.90%),AB基因型106例（占46.90%),BB基因型14例(占6.20%);对照组AA基因型则为146例(占63.20%),AB基因型80例(占34.63%),BB基因型5例(占2.17%)。病例组中MBL-AB突变基因频率显著高于健康对照组,两组的突变基因频率分别为6.20%、2.17%,差异有统计学意义(χ²=5.224,P_c＜0.05)。 结论 新疆维吾尔族人群中MBL基因AA基因型可能为结核病的保护性因素,BB基因型可能为结核病发病的危险性因素。新疆维吾尔族人群中MBL基因A/B位点多态性与结核病易感性有明显相关性。     

2型糖尿病家系瘦素基因启动子C2549A多态性研究

目的　了解中国人瘦素基因启动子的基因型分布 ,探讨瘦素基因多态性与血浆瘦素水平之间的关系 ,探讨瘦素基因多态性与 2型糖尿病患者及其非糖尿病一级亲属代谢间的关系。方法　以 2型糖尿病家系中的糖尿病患者、非糖尿病一级亲属为研究对象 ,应用聚合酶链反应及限制性片段长度多态性方法 ,对 489例中国人 (包括 2 69例 2型糖尿病患者、1 35例非糖尿病一级亲属和 85例正常对照 )的瘦素基因启动子 2 549位核苷酸变异 (C2 549A)进行研究 ,同时进行血浆瘦素水平、人体测量学、代谢、临床参数的检测。结果　 (1 ) 2型糖尿病患者AA基因型频率 (0 .0 63)和A等位基因频率 (0 .349)高于正常对照(AA基因型频率为 0 .0 1 2 ,A等位基因频率为 0 .2 53 ,P <0 .0 5)。 (2 )糖尿病患者中AA、AC基因型携带者空腹血浆瘦素较CC型降低 (P <0 .0 5) ,女性中AA基因型携带者空腹血浆胰岛素、胰岛素抵抗指数水平低于CC、AC基因型携带者 (P <0 .0 5) ,男性中AA、AC基因型的糖尿病病程较长 (P <0 .0 5)。 (3)非糖尿病一级亲属中女性AA基因型携带者空腹瘦素水平低于AC基因型携带者。男性AA基因型和AC基因型的空腹血浆胰岛素、胰岛素抵抗指数较CC基因型降低 (P <0 .0 5)。结论　 (1 ) 2型糖尿病患者瘦素基因C2 549A多态性与空腹血浆     

Gender-specific differences in the association of adiponectin gene polymorphisms with body mass index

OBJECTIVE: Adiponectin gene polymorphisms are associated with obesity, metabolic syndrome and type 2 diabetes (T2D). The study evaluated possible associations of +45T/G and -11391G/A adiponectin gene polymorphisms with body mass index (BMI), waist circumferences (WC), and blood pressure in diabetic and non-diabetic Iranians. METHODS: This cross-sectional study involved two groups of subjects: 243 diabetic patients and 173 non-diabetic subjects recruited from Rafsanjan city in the south-east of Iran. RESULTS: No significant association was found between +45T/G and -11391G/A adiponectin gene polymorphisms and systolic or diastolic blood pressure. However, male carriers of the TT genotype of +45T/G had a significantly higher mean BMI than male GG homozygotes (p = 0.018). Also, male carriers of the GG genotype of -11391G/A had significantly higher mean BMI than male GA or AA homozygotes (p = 0.041). Female carriers of the GG genotype of -11391G/A had significantly higher mean WC than female GA or AA homozygotes (p = 0.038). CONCLUSIONS: We observed a significantly higher BMI in women, and GA or AA carriers of -11391G/A polymorphism. Also, there was a significantly lower WC in females and GG carriers of +45T/G. These results point to a gender-specific impact of the studied genotypes on BMI and WC.     

Adiponectin gene polymorphism 45T>G is associated with carotid artery plaques in patients with type 2 diabetes mellitus

Adiponectin has been reported to have a wide range of antiatherogenic actions. Two common single nucleotide polymorphisms (SNPs) at the adiponectin locus (45T>G and 276G>T) have been reported to be associated with diabetes and cardiovascular diseases. The aim of this study was to examine the association between common polymorphisms of the adiponectin gene (ACDC) and carotid atherosclerosis in patients with type 2 diabetes mellitus. A total of 708 unrelated patients with type 2 diabetes mellitus were recruited. SNP45 and SNP276 ACDC were genotyped, and B-mode ultrasonography of the carotid arteries was performed to measure carotid intima-media thickness and assess the presence of carotid artery plaques (CAP). Although there was no significant difference in carotid intima-media thickness according to ACDC genotype, subjects carrying the SNP45 GG genotype had a significantly higher risk of having CAP (odds ratio, 2.468; P = .045) compared with carriers of the T allele after adjustment for possible confounding factors. This study suggests that the GG genotype at ACDC SNP45 is associated with the presence of CAP and may contribute to atherosclerosis in type 2 diabetes mellitus.     

Polymorphism in the Calpain 10 gene influences glucose metabolism in human fat cells

Aims/hypothesis: A common G to A polymorphism (UCSNP-43) in the Calpain 10 gene was recently found to be associated with Type II (non-insulin-dependent) diabetes mellitus and variations in post-absorptive and insulin stimulated glucose metabolism in vivo. We aimed to study the influence of Calpain 10 polymorphism on insulin action in fat cells. Methods: Calpain 10 polymorphism (UCSNP-19, -43 or -63) were set in relation to lipolysis and lipogenesis in isolated subcutaneous adipocytes of 46 apparently healthy non-obese subjects. Results: For UCSNP-43 the G/G genotype had twofold higher basal and insulin stimulated rates as compared with AA/AG genotypes. However, there was no genotype effect on basal or insulin inhibited lipolysis rates in fat cells. The protein amount of GLUT 4 in adipocytes was not influenced by the polymorphism. Fat cells expressed mRNA for the Calpain 10 gene at a relatively high concentration, about 4 amol/μg RNA, which is similar to that of uncoupling protein-2. Neither a UCSNP-19 nor a UCSNP-63 polymorphism in the Calpain 10 gene was found to be associated with basal or insulin-induced adipocyte lipolysis and lipogenesis. None of the polymorphisms influenced body mass index or fasting plasma concentrations of insulin and glucose in 693 non-obese healthy subjects. Conclusions/interpretation: The Calpain 10 gene could be involved in the regulation of glucose metabolism but not lipolysis in human fat cells, although it does not involve adipocyte GLUT-4 protein content. It is possible that the Calpain 10 gene predisposes to diabetes by influencing the glucose metabolism. [Diabetologia (2002) 45: 276–282] Received: 2 July 2001 and in revised form: 28 September 2001     

Caucasian patients with type 2 diabetes mellitus have elevated levels of monocyte chemoattractant protein-1 that are not influenced by the -2518 A-->G promoter polymorphism

AIM: To investigate the association of serum levels and the -2518 A-->G promoter polymorphism of the gene for chemokine monocyte chemoattractant protein-1 (MCP-1), a major chemoattractant of monocytes and activated lymphocytes, with metabolic parameters as well as insulin, leptin and the cytokines tumour necrosis factor-alpha (TNF-alpha) and interleukin-6 (IL-6) in 534 Caucasian patients with type 2 diabetes mellitus. METHODS: MCP-1 concentrations were measured by enzyme-linked immunosorbent assay. MCP-1 genotyping was performed by RFLP analysis in a subset of 426 patients. RESULTS: Two hundred and thirty-one (54.2%) patients were homozygous for the wildtype allele (AA), 156 (36.6%) were heterozygous (AG) and 39 (9.2%) were homozygous for the mutated allele (GG). Allelic frequency was similar to non-diabetic populations (wildtype allele A: 0.73; mutated allele G: 0.27). MCP-1 mean concentrations and percentiles were substantially higher in non-diabetic populations but were not influenced by the genotype (AA: 662.0 +/- 323.0 pg/ml; AG: 730.6 +/- 491.4 pg/ml; GG: 641.2 +/- 323.8 pg/ml). MCP-1 serum levels and genotypes were only marginally related to hormones (insulin and leptin) and cytokines (TNF-alpha and IL-6). CONCLUSIONS: This is the first study providing MCP-1 levels, percentiles and genotype frequency in a large and representative cohort of patients with type 2 diabetes mellitus. Compared to the literature, MCP-1 levels were found to be substantially higher in patients with type 2 diabetes mellitus. In contrast, genotype frequencies were similar compared to those in non-diabetic patients and were not related to MCP-1 levels. The mechanisms behind these elevated MCP-1 serum levels in type 2 diabetes are not to be explained by simple associations with hormones, cytokines or genotypes.     

Association of calpain-10 gene with microvascular function

AIMS/HYPOTHESIS: Genotype could influence vascular function. In some populations, Calpain 10 gene polymorphisms increase susceptibility to diabetes or insulin resistance. Alterations in microvascular function could contribute to insulin resistance. This study investigated whether polymorphisms in the Calpain-10 gene influence microvascular function. METHODS: Skin maximum microvascular hyperaemia to local heating on the dorsum of the foot (30 min at 43 degrees C) was measured by Laser Doppler Fluximetry in 37 healthy volunteers. All were normoglycaemic according to World Health Organisation criteria, normotensive and not on any medication.Four polymorphisms in the calpain-10 gene were typed: SNP-44, SNP-43, SNP-19, SNP-63. The SNP common to all the described high risk haplotypes is the G-allele at SNP-43. This intron 3 polymorphism appears to influence gene expression. Microvascular function was examined in relation to polymorphisms at this site alone as well as the effects of the known extended high risk haplotypes using the SNP's above. RESULTS: Maximum microvascular hyperaemia was increased in the 21 subjects with G/G genotypes at SNP-43 compared to the combined group of subjects ( G/ A genotype at SNP-43 ( n=12) + A/ A genotype at SNP-43 ( n=4)), and the minimum microvascular resistance was reduced 49.4 (39.6-94.2) vs 67.5 (39.1-107.3) mmHg/V, p=0.007). Haplotype analysis of the hyperaemic response revealed no significant differences between haplotypes. The two groups did not differ in terms of anthropometric measures, blood pressure, insulin resistance or glucose. CONCLUSIONS/INTERPRETATION: The polymorphism that confers susceptibility to Type II (non-insulin-dependent) diabetes mellitus in some populations is associated in United Kingdom Caucasians with enhanced microvascular function in the presence of normoglycaemia.     

Calpain 10 gene polymorphisms are related, not to type 2 diabetes, but to increased serum cholesterol in Japanese

A G-to-A (UCSNP-43) polymorphism of the calpain-10 gene was significantly associated with type 2 diabetes (DM) in Mexican-American, and was postulated, together with a T-to-C (UCSNP-44) polymorphism, as a risk factor for DM. We examined the association of these genotypes with DM in Japanese. Eighty-one subjects with DM and 81 non-diabetic subjects (NGT) were recruited. The number of subjects with genotypes UCSNP-43 G/G, G/A and A/A were 76, 5 and 0, respectively, for the DM and NGT groups. The number of subjects with genotypes UCSNP-44 T/T, T/C and C/C were 66, 14 and 1 for the DM group and 64, 17 and 0 for the NGT group. There was no difference between the groups in terms of frequency of any genotype combinations. No association between the genotypes and DM was observed. We next examined the differences between the genotypes or genotype combinations in terms of the traits related to DM, obesity, hypertension and dyslipidemia. No differences were observed between the genotypes UCSNP43 G/G and G/A, between UCSNP-44 T/T and the others, or between the genotype combination UCSNP-43 G/G and UCSNP-44 T/T and the others, except that the individuals with the genotype combination had significantly increased serum cholesterol levels (212.6 +/- 34.3 vs. 198.5 +/- 29.9, P=0.020). The genotype combination might be a risk factor, not for DM, obesity and hypertension, but for increased serum cholesterol.     

尾加压素Ⅱ基因多态性与多囊卵巢综合征相关性的研究

目的 探讨尾加压素Ⅱ(UTS2)基因多态性与多囊卵巢综合征(PCOS)发病的关系.方法 用熔解温度不同的基因分型法.检测PCOS患者101例(PCOS组)及其父母202名和105名健康妇女(对照组)UTS2基因rs228648、rs2890565位点单核苷酸多态性(SNP),并检测基础状态下FSH、LH、睾酮、空腹血糖、空腹胰岛素水平.结果 PCOS组的UTS2基因rs228648 A/G多态性位点与对照组比较,基因型与等位基因频率均无明显差异,两组的SNP rs2890565基因型频率差异有统计学意义(P<0.05),PCOS组A等位基因频率明显高于对照组(P<0.05).传递不平衡检验(TDT)显示,SNP rs228648A/G在杂合子父母的2个不同等位基因无优势传递(P>0.05),而rs2890565 A/G在杂合子父母A等位基因优势传递(P<0.05).PCOS组UTS2基因SNP rs228648 GG基因型较携带A等位基因的PCOS患者稳态模型评估的胰岛素抵抗指数(HOMA-IR)明显增高(P<0.05).SNP rs2890565从和AG基因型空腹血糖、空腹胰岛素较GG基因型明显增高,从基因型HOMA-IR较GG基因型明显增高(P<0.05).结论 UTS2基因SNP rs228648 A/G多态性与PCOS无相关性,但与胰岛素抵抗存在关联.UTS2基因SNP rs2890565可能在PCOS的遗传易感性中起一定作用,A等位基因可能与PCOS的发生有关.     

Association of Resistin Gene 3'-Untranslated Region EX4-44G-->A Polymorphism with Obesity- and Insulin-Related Phenotypes in Turkish Type 2 Diabetes Patients

Resistin, an adipocyte-secreted hormone, has been associated with obesity, insulin resistance and type 2 diabetes mellitus (T2DM) in some, but not all, rodent models. In humans, the exact function of resistin is unkown. Because 3'-untranslated region (3'-UTR) single nucleotide substitutions (SNPs) have been shown to affect gene expression, we examined the EX4-44G-->A SNP in the 3'-UTR of exon 3 within the resistin gene. The objective of this study was to investigate, for the first time in a Turkish study group, whether the 3'-UTR EX4-44G-->A variation in the resistin gene influences the development of T2DM, obesity and insulin-related phenotypes. We analyzed the genotype frequencies of the EX4-44G-->A polymorphism of the resistin gene in 116 type 2 diabetic and 102 normal subjects. Serum lipids, obesity-related and insulin-related phenotypes were analyzed. No significant difference for genotypic frequencies were observed for the BseRI restriction site in type 2 diabetic patients as compared to controls. Waist-to-hip ratio, BMI, body fat and apoAI levels were found to be affected by resistin genotype. In the control group, BMI (p < 0.01), HIS (p < 0.05) and BF (p < 0.05) levels were found to be elevated, whereas HOMA beta-cell index (p < 0.01) and apo AI (p < 0.05) levels were found to be decreased in GG genotype carriers. In the diabetic group, the GG genotype carriers were found to have higher BMI levels (p < 0.001), waist-to-hip ratio (p < 0.05), body fat (p < 0.01), HOMA (p < 0.001) and fasting insulin (p < 0.05), but lower HbA1c levels in comparison to GC + AA carriers. These data suggest that, in the Turkish study group, the EX4-44G-->A polymorphism of the resistin gene is associated with insulin and obesity-related phenotypes.