慈溪地区2型糖尿病易感基因分析

目的探讨HHEX基因rs1111875、CDKAL1基因rs7756992、TCF7L2基因rs12255372和rs7903146的多态性与慈溪地区2型糖尿病（T2DM）的相关性。方法应用pyromark Q96 ID 焦磷酸测序仪对543例正常人群和310例T2DM患者HHEX基因rs1111875、CDKAL1基因rs7756992、TCF7L2基因rs12255372和rs7903146的多态性分析。结果 TCF7L2基因rs7903146位点的基因型和等位基因分布糖尿病组和健康人群组之间差异有统计学意义（P〈0.05）,但rs12255372位点的基因型和等位基因分布两组差异无统计学意义,HHEX基因rs1111875位点和CDKAL1基因rs7756992位点的基因型和等位基因分布两组差异也无统计学意义。结论慈溪地区的人群中,TCF7L2基因可能是2型糖尿病的易感基因之一,其SNP位点rs7903146变异可能与2型糖尿病发病密切相关。     

TCF7L2基因rs7903146多态性与2型糖尿病的相关性研究

目的探讨转录因子7样2(TCF7L2)基因rs7903146多态性与中国随州地区汉族人群2型糖尿病的相关性。方法选取已经确诊为2型糖尿病患者458例,其中男232例,女226例;空腹血糖<5.6 mmol/L,无其他系统性疾病的表现健康个体186名,其中男91名,女95名。测量研究对象的一般临床指标,糖代谢和脂代谢相关指标。应用聚合酶链反应(PCR)TaqManTM荧光探针技术进行等位基因分型,对2组共642例研究对象的TCF7L2基因rs7903146多态性进行分析。结果 TCF7L2基因rs7903146多态性符合Hardy-Weinberg平衡定律,TCF7L2基因rs7903146的C/C、C/T、T/T 3种基因型在2型糖尿病组中的频率分别为92.2%、7.6%和0.2%,在对照组的频率为92.5%、7.5%和0%,χ2检验发现,2组间差异无统计学意义。T等位基因频率在糖尿病组和对照组分别为4.0%、3.8%,经χ2检验差异无统计学意义。结论 TCF7L2 rs7903146多态性不是湖北随州地区的汉族人群中2型糖尿病的主要致病基因位点。     

TCF7L2基因rs7903146位点多态性与2型糖尿病胰岛β细胞早相功能的相关性

目的探讨TCF7L2基因rs7903146位点单核苷酸多态性与青岛2型糖尿病病人胰岛β细胞早相功能的相关性。方法应用限制性片段长度多态性（RFLP）方法,对213例青岛及周边地区汉族人（其中2型糖尿病病人99例、正常对照114例）的TCF7L2基因rs7903146位点进行基因分型;用左旋精氨酸兴奋实验测定胰岛β细胞早相功能。结果 2型糖尿病组rs7903146位点的CT基因型和T基因频率均明显高于正常对照组（χ2=4.678、4.507,P〈0.05）,其中有家族史的2型糖尿病病人的CT基因型和T基因频率明显高于正常对照组（χ2=4.896、4.739,P〈0.05）,而无家族史组和正常对照组比较差异无显著性（P〉0.05）,有家族史和无家族史组之间比较也无统计学差异（P〉0.05）;CT比CC基因型患2型糖尿病的危险度显著增加（OR=3.28,95%CI为1.026~10.459,P〈0.05）。rs7903146位点CC和CT基因型的胰岛β细胞早相功能差异无显著性（P〉0.05）。结论 TCF7L2基因rs7903146位点多态性与2型糖尿病发病风险有关,该位点多态性与胰岛β细胞早相分泌功能关联性不强。     

转录因子7类似物2基因多态性与新疆维吾尔族人群2型糖尿病的相关性

目的:探讨新疆地区维吾尔族人群转录因子7类似物2(TCF7L2)基因多态性与2型糖尿病的关系。方法:采用病例-对照研究设计,以经确诊的939例2型糖尿病患者作为病例组,选取931例健康个体作为对照组。收集研究对象血液标本5 m L,提取基因组DNA。应用基质辅助激光解吸附电离飞行时间质谱分析质谱技术(MALDI-TOF)进行多态性检测。结果:TCF7L2基因rs7901695位点基因型及等位基因频率分布在病例组、对照组中比较差异有统计学意义(P<0.05);rs7094463位点基因型及等位基因频率分布在两组中比较差异无统计学意义(P>0.05)。结论:TCF7L2基因rs7901695多态性位点可能与新疆维吾尔族人群2型糖尿病具有相关性,而rs7094463多态性位点可能与新疆维吾尔族人群2型糖尿病无相关性。     

TCF7L2基因rs7903146的多态性与2型糖尿病肥胖的相关性

【目的】探讨TCF7L2基因rs7903146的多态性与2型糖尿病（T2DM ）肥胖的相关性。【方法】收集T2DM 患者216例（DM组）,根据体质量指数（BMI）又分为肥胖T2DM组（BMI＞25 kg／m2）和正常T2DM组（BMI≤25 kg／m2）,另外收集健康体检者194例,根据体质量指数（BMI）又分为肥胖对照组（BMI＞25 kg／m2）和正常对照组（BMI≤25 kg／m2）,采用 PCR‐RFLP技术检测各组 TCF7L2基因 rs7903146多态性并比较。【结果】T2DM组与对照组TCF7L2基因rs7903146位点基因型及等位基因频率分布比较差异无统计学意义（ P ＞0．05）;肥胖DM组与正常DM组、肥胖对照组与正常对照组 TCF7L2基因rs7903146位点基因型分布、等位基因频率比较均有统计学意义（ P ＜0．05）,肥胖DM 组与肥胖对照组、正常DM 组与正常对照组基因型分布、等位基因频率比较均无统计学意义（ P ＞0．05）。【结论】TCF7L2基因rs7903146位点变异不是糖尿病发病的危险因素,有可能是引起肥胖的重要遗传因素。     

江苏地区2型糖尿病易感基因单核苷酸多态性与妊娠期糖尿病关系的研究

目的探讨江苏地区2型糖尿病易感基因CDKAL1、CDKN2A-CDKN2B、TCF7L2及HHEX-IDE的单核苷酸多态性（SNP）与妊娠期糖尿病（GDM）的关系。方法采用病例对照法及多重SNaPshot SNP分型技术检测185例无GDM倾向的健康孕妇（对照组）及176例GDM孕妇（GDM组）CDKAL1、CDKN2A-CDKN2B、TCF7L2及HHEX-IDE的SNP位点基因分型,并对所有SNP位点进行连续不平衡分析。结果比较GDM组和对照组孕妇的等位基因频率,CDKAL1（rs7754840）的等位基因C为GDM的一个危险因素。CC型携带者患GDM的风险是未携带者的1.73倍[P〈0.01,OR=1.73,95%CI：1.28~2.33]。CDKN2A-CDKN2B（rs10811661）、TCF7L2（rs7903146）及HHEX-IDE（rs1111875）检测位点的基因分布差异无统计学差异（P〉0.05）。CDKAL1（rs7754840）、CDKN2A-CDKN2B（rs10811661）、TCF7L2（rs7903146）及HHEX-IDE（rs1111875）的基因型频率均符合遗传平衡法则。结论 CDKAL1（rs7754840）与江苏地区GDM易感密切相关。     

TCF7L2基因rs7903146位点基因多态性与2型糖尿病合并冠状动脉粥样硬化性心脏病的相关性研究

目的探讨转录因子7类似物2(TCF7L2)基因rs7903146位点基因多态性与2型糖尿病(T2DM)合并冠状动脉粥样硬化性心脏病(CHD)发病风险的相关性,寻找T2DM合并CHD的易感基因及影响因素.方法选取该院100例T2DM患者为T2DM组,100例CHD患者为CHD组,100例T2DM合并CHD患者为T2DM+...     

骨保护素基因rs2073617T/C、rs2073618G/C多态性在东南沿海地区汉族人群中分布及与急性冠状动脉综合征相关性研究

目的 探讨骨保护素(OPG)基因启动子rs2073617T/C和第一外显子rs2073618G/C位点基因多态性在福建地区汉族人群中的分布及与急性冠状动脉综合征(ACS)的相关性.方法 纳入720例福建地区无血缘关系的汉族人为研究对象,分成ACS 360例(ACS组)和对照组360例(对照组),采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术,对OPG基因rs2073617T/C和rs2073618G/C多态性位点进行基因型分型,同时采用DNA测序对酶切产物进行鉴定.结果 (1)在福建地区汉族人群中,OPG基因rs2073617T/C多态性位点存在TC、TT、CC三种基因型;rs2073618G/C多态性位点也存在GG、GC、CC三种基因型.(2)对ACS组与正常对照组OPG基因rs2073617T/C、rs2073618G/C基因型及等位基因频率分布进行比较均无统计学差异(P均>0.05).(3)ACS组患者单支病变、双支病变及三支以上病变组之间比较OPG基因rs2073617T/C、rs2073618G/C各基因型差异无统计学意义(P均>0.05).结论 福建地区汉族人群OPG rs2073617T/C、rs2073618G/C位点基因多态性与ACS发生无明确相关性.     

RAB7L1基因多态性与济宁地区汉族人群 PD发病风险的关系

目的:探讨RAB7L1基因多态性与济宁地区汉族人群帕金森病(PD)发病的关系。方法:选取2015年10月至2016年4月在我院就诊的PD患者200例(观察组),同时选取健康体检者200例作为对照组。对2组受试者进行RAB7L1基因rs1775143和rs823144位点的多态分析。结果:rs1775143位点显示3种基因型(TT型、CT型和CC型),rs823144位点显示3种基因型(AA型、AC型和CC型);观察组和对照组rs1775143基因型和等位基因频率比较差异有统计学意义(P0.05);观察组和对照组rs823144基因型和等位基因频率比较差异无统计学意义(P0.05)。结论:RAB7L1基因rs1775143位点的多态性可能与济宁地区汉族人群PD的发生有一定关系,而rs823144位点可能与PD的发生无关。     

葡萄糖激酶基因4个标签单核苷酸多态性位点与2型糖尿病的相关性研究

目的探讨葡萄糖激酶(GCK)基因4个标签单核苷酸多态性(tagSNPs)位点rs12702070、rs2268569、rs2268573、rs1476891与2型糖尿病(T2D)的关系。方法选取中山大学附属中山医院住院的中国南方汉族T2D患者499例(T2D组),同时选择汉族健康人499例作为对照组,对GCK基因的4个tagSNPs位点进行基因分型并检测样本代表性。比较T2D组和对照组基因型和等位基因频率的差异,并在3种遗传模型下对各SNP位点进行相关性分析。构建GCK基因4个tagSNPs位点的单体型,分析是否存在连锁不平衡(LD)及不同的GCK单体型与T2D易感性的关系。结果 rs2268573、rs2268569、rs1476891的基因型和等位基因频率在T2D组和对照组之间差异均无统计学意义。rs12702070的基因型和等位基因分布在D2M组和对照组之间差异有统计学意义,且在显性遗传模式下以及在加性遗传模式下其基因型分布在两组之间差异有统计学意义。GCK基因4个位点中rs2268569、rs12702070和rs1476891有1个LD域,其中共存四种主要单体型,均与个体患T2D的风险无相关性。结论在汉族人群中,GCK基因区域的rs12702070位点与糖尿病遗传易感性密切相关,而rs2268573、rs2268569、rs1476891位点与糖尿病遗传易感性无明确相关性。rs2268569、rs12702070、rs1476891LD域四种主要单体型均与个体患T2D的风险无相关性。     

Comparison of genetic risk in three candidate genes (TCF7L2, PPARG,KCNJ11) with traditional risk factors for type 2 diabetes in a population‐based study – the HUNT study

We studied the impact of genetic and traditional risk factors for type 2 diabetes in a large, population‐based study from Nord‐Trøndelag county in Norway (HUNT), in both cross‐sectional and prospective design. Material and methods. 65,905 individuals participated in the HUNT study. We studied a randomly selected group of 869 individuals with self‐reported diabetes or non‐fasting serum glucose ?11.1?mmol/L and 2,080 non‐diabetic control subjects with non‐fasting serum glucose <5.5?mmol/L. Four candidate polymorphisms in the three genes TCF7L2 (rs12255372 and rs7903146), PPARG (rs1801282), KCNJ11 (rs5219) and traditional risk factors were studied. Results. Risk alleles of the TCF7L2 gene showed increased risk of diabetes even when controlled for traditional diabetes risk factors (diabetes in family, waist circumference, physical activity, BMI, SBP and total and HDL‐cholesterol) in both a cross‐sectional and prospective setting (cross‐sectional: rs12255372 OR 1.61 (1.31–1.99), rs7903146 OR 1.48 (1.20–1.83) and prospective: rs12255372 OR 1.59 (1.22–2.07), rs7903146 OR 1.47 (1.11–1.93)). The risk alleles of TCF7L2 indicated impaired β‐cell function in patients and control subjects. The population attributable risks for diabetes with TCF7L2 risk alleles were 15?% and with diabetes in a first‐degree relative 31?%. Conclusion. The risk alleles of the TCF7L2 gene (rs12255372 and rs7903146) were strongly associated with type 2 diabetes, even after controlling for traditional risk factors in both a cross‐sectional and prospective setting. These risk alleles were associated with indices of reduced β‐cell function.     

Transcription Factor 7-Like 2 (TCF7L2) Polymorphism and Hyperglycemia in an Adult Italian Population-Based Cohort

OBJECTIVE

To assess whether TCF7L2 polymorphism has a role in the deterioration of glycemic control.

RESEARCH DESIGN AND METHODS

Metabolic variables were evaluated at baseline and after 6-year follow-up in 1,480 Caucasian subjects from a population-based cohort.

RESULTS

At baseline, T-allele carriers showed significantly lower BMI and homeostasis model assessment for β-cell function (HOMA-B) values and higher fasting glycemia and diabetes prevalence. At follow-up, fasting glucose and HOMA-B index were increased and reduced, respectively, in carriers of the T-allele. Incident impaired fasting glucose (IFG) and incident diabetes were 5.7, 10.7, 16.9% and 1.6, 1.7, 3.0% in the CC, CT, and TT genotypes, respectively. In a multiple logistic regression model, the association between incident IFG and the T-allele was significant (odds ratio [OR] 2.08 [95% CI 1.35–3.20] and 3.56 [2.11–5.98] in CT and TT genotypes, respectively).

CONCLUSIONS

The T-allele of TCF7L2 rs7903146 polymorphism was independently associated with increasing fasting glucose values toward hyperglycemia in the follow-up.Among the variety of TCF7L2 polymorphisms correlating with type 2 diabetes, the single nucleotide polymorphism (SNP) rs7903146 has shown the strongest association with the disease (1). We investigated the association of the SNP rs7903146 with 1) type 2 diabetes or 2) impaired fasting glucose (IFG) or 3) the metabolic syndrome (MS) in an adult Italian population-based cohort both cross-sectionally and after 6-year follow-up.