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目前已知的几种单基因突变糖尿病(DM)中,线粒体tRNA^Leu(UUR)基因3243A→G点突变最为多见,已在不同种族中被发现。本研究对线粒体基因突变热点区域一tR—NA^Leu(UUR)基因及其邻近区域内的4个位点(np3243、np3316、np3394、np3426)进行筛查,旨在探讨线粒体基因突变在我国2型糖尿病(T2DM)患者中的存在情况。  相似文献   

3.
目的探讨家族性2型糖尿病(T2DM)线粒体基因tRNA^Leu(UUR)mt3243A→G突变发生率及突变家系成员病情演变与临床特征。方法采用PCR/ApaI酶切法对66个家族性T2DM的家系成员共计518人进行突变筛查,并随访3年,观察其临床特点及胰岛B细胞功能变化。结果共发现突变阳性12例,其中3例为已确诊的T2DM患者,1例为糖耐量减低(IGT)患者,8例为糖耐量正常(NGT)者。随访3年后突变阳性者的耳聋症状加重,BMI、HOMA—IR下降,部分成员出现了白蛋白尿,2例演变为DM,3例进展为IGT,其中一例突变阳性者新生一女也为该基因突变阳性。结论家族性T2DM患者中线粒体基因突变发生率约为2.7%,且突变患者的临床表现呈一定的异质性;线粒体基因突变阳性的NGT者是糖尿病高危人群,易演变为IGT或DM,而IGT者易进展为DM。  相似文献   

4.
线粒体tRNA^LEU(UUR)的保留位置3243核苷酸的基因发生突变可致糖尿病,该类糖尿病主要发生在NIDDM患者中,为母系遗传方式,线粒体糖尿病具有一系列的临床特征。  相似文献   

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迄今己发现了mt基因、胰岛素基因、胰岛素受体基因、葡萄糖激酶基因、肝细胞核因子4a基因、肝细胞核因子1β基因及肝细胞核因子1α基因等单基  相似文献   

6.
线粒体tRNA(LEU(UUR))的保留位置3243核苷酸的基因发生突变(A→G)可致糖尿病,该类糖尿病主要发生在NIDDM患者中,为母系遗传方式。线粒体糖尿病具有一系列的临床特征。  相似文献   

7.
线粒体基因突变糖尿病研究新进展   总被引:2,自引:0,他引:2  
自1992年Ballinger和Ouweland首次确认了由线粒体DNA(mtDNA)核苷酸3243A→G突变引起糖尿病以来,各国学者已先后在不同的种族发现本病,它是目前所知单基因突变致糖尿  相似文献   

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256例2型糖尿病和140例健康对照者研究显示,线粒体基因ND13316 G→A突变在中国北部2型糖尿病人群中的发生率约为3.52%,突变对T2DM的发生有一定风险性,但不是主要的易感基因.  相似文献   

9.
线粒体基因突变糖尿病(MDM)的发现是近年来糖尿病分子遗传学研究的重要进展之一。自1988年确认出第一种线粒  相似文献   

10.
256例2型糖尿病和140例健康对照者研究显示,线粒体基因ND13316G→A突变在中国北部2型糖尿病人群中的发生率约为3.52%,突变对T2DM的发生有一定风险性,但不是主要的易感基因。  相似文献   

11.
目的 研究湖北地区老年2型糖尿病(T2DM)患者中线粒体基因突变的发生率及其相关性.方法 采用PCR-RFLP、基因测序技术,对175例老年T2DM患者和200例糖耐量正常的健康老年对照组进行检测.结果 MIND1 3316(G→A)、MTTL1 3243(A→G)、MIND13394( T→C)、MIND14216(T→C) MIND14164(A→G)和MIND2 5178( T→C)变异率分别为3.26%、2.72%、1.71%、4%、34.9%;对照组检出3316(G→A)突变2例(0.99%)、4164 5例(0.99%)、5718(T→C)变异64例(32.3%),未检出3394、4216的点突变;两组间3394(T→C)变异率差别有统计学意义(P<0.05);且T2DM组5178A基因型血清TC水平低于5178C基因型(P<0.05),但TG、LDL-C、HDL-C、apoA、apoB、Lp(a)水平两组无统计学意义.结论 3394( T→C)与老年T2DM患者的易感性有一定关联,5178(T→C)变异与湖北地区老年汉族人T2DM的脂代谢相关.  相似文献   

12.
青岛地区20~74岁人群糖尿病患病率调查   总被引:21,自引:7,他引:21  
目的 了解青岛地区成人糖尿病 (DM )的患病率。 方法 采用分层随机整群抽样方法 ,在 2 0 0 1年 5月~ 2 0 0 2年 6月期间 ,横断面调查青岛地区 2县 5区 2 0~ 74岁居民 14 6 0 6名。除市南区的 2 170名居民直接采用口服 75 g葡萄糖耐量试验 (OGTT)进行筛查外 ,其余各点的 12 4 36名被调查者需先行指血筛查 ,当毛细血管血糖≥ 6 1mmol/L时进行OGTT确定诊断。 结果 青岛地区 2 0~ 74岁人群DM标化的患病率为 5 5 % ,其中 6 4 5 %为新诊断的DM。其中市南区居民DM、糖耐量受损 (IGT)、空腹血糖受损 (IFG)和糖调节受损 (IGR)的标化患病率分别为 9 1%、6 6 %、4 5 %和 11 1%。乡村居民DM的患病率低于城镇居民 (5 0 %比 6 1% ,P <0 0 0 1)。乡村中 ,女性患病率高于男性 (5 7%比 4 0 % ,P <0 0 1)。随着年龄的增加 ,DM的患病率逐渐增加。 结论 青岛地区DM患病率与 1994年及 1996年全国流行病学调查结果相比 ,青岛地区DM的患病率明显升高。随着地区的城市化和人口的老龄化程度进一步增加 ,DM患病率将有更大幅度的升高  相似文献   

13.

Aim

As the prevalence and clinical characteristics of non-alcoholic fatty liver disease (NAFLD) are still unknown in ketosis-onset diabetes, the present study compared the characteristics of NAFLD in type 1 diabetes (T1D), ketosis-onset and non-ketotic type 2 diabetes (T2D) patients.

Methods

This cross-sectional study was performed with newly diagnosed Chinese patients with diabetes, including 39 T1D, 165 ketosis-onset and 173 non-ketotic T2D, with 30 non-diabetics included as controls. NAFLD was determined by hepatic ultrasonography, then its clinical features were analyzed and its associated risk factors evaluated.

Results

NAFLD prevalence in patients with ketosis-onset diabetes (61.8%) was significantly higher than in controls (23.3%; P = 0.003) and in T1D patients (15.4%; P < 0.001). However, there was no difference in prevalence between ketosis-onset and non-ketotic T2D patients (52.6%; P = 0.229), although BMI and alanine aminotransferase (ALT) proved to be independent risk factors for the presence of NAFLD in both these groups whereas, in T1D patients, serum uric acid levels were independent risk factors.

Conclusion

NAFLD prevalence and risk factors in ketosis-onset diabetes were similar to those in non-ketotic T2D, but different from those in T1D. These data provide further evidence that ketosis-onset diabetes should be classified as a subtype of T2D rather than idiopathic T1D.  相似文献   

14.
中国人家族性糖尿病人群中线粒体tRNALys基因突变筛查   总被引:1,自引:0,他引:1  
线粒体赖氨酸基因的三个突变-tRNALyB8296A→G,tRNALyB8344A→G和tRNALyB8363G→A与日本人糖尿病的发病相关。本研究在糖尿病患者及对照组中均未发现这三个突变,提示这三个点突变均不是中国人线粒体糖尿病发病的原因。  相似文献   

15.
Aims/hypothesis This multinational study was conducted to investigate the association between a mitochondrial DNA (mtDNA) T16189C polymorphism and type 2 diabetes in Asians. The mtDNA 16189C variant has been reported to be associated with insulin resistance and type 2 diabetes. However, a recent meta-analysis concluded that it is negatively associated with type 2 diabetes in Europids. Since the phenotype of an mtDNA mutant may be influenced by environmental factors and ethnic differences in the nuclear and mitochondrial genomes, we investigated the association between the 16189C variant and type 2 diabetes in Asians. Methods The presence of the mtDNA 16189C variant was determined in 2,469 patients with type 2 diabetes and 1,205 non-diabetic individuals from Korea, Japan, Taiwan, Hong Kong and China. An additional meta-analysis including previously published Asian studies was performed. Since mtDNA nucleotide position 16189 is very close to the mtDNA origin of replication, we performed DNA-linked affinity chromatography and reverse-phase liquid chromatography/tandem mass spectrometry and chromatin immunoprecipitation to identify protein bound to the 16189 region. Results Analysis of participants from five Asian countries confirmed the association between the 16189C variant and type 2 diabetes [odds ratio (OR) 1.256, 95% CI 1.08–1.46, p = 0.003]. Inclusion of data from three previously published Asian studies (type 2 diabetes n = 3,283, controls n = 2,176) in a meta-analysis showed similar results (OR 1.335, 95% CI 1.18–1.51, p = 0.000003). Mitochondrial single-stranded DNA-binding protein (mtSSB) was identified as a candidate protein bound to the 16189 region. Chromatin immunoprecipitation in cybrid cells showed that mtSSB has a lower binding affinity for the 16189C variant than the wild-type sequence. Conclusions/interpretation The mtDNA 16189C variant is associated with an increased risk of type 2 diabetes in Asians. Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorised users.  相似文献   

16.
目的 研究利拉鲁肽单用或与二甲双胍、胰岛素促泌剂联用对中国2型糖尿病患者的有效性和安全性.方法 为多中心、自身对照、开放式临床研究,60例未接受药物治疗、114例已使用二甲双胍、46例已使用胰岛素促泌剂而血糖仍未达标的患者在原治疗基础上,联合利拉鲁肽0.6 mg降糖,并根据空腹血糖是否达标每2 周增加0.6 mg,最大剂量1.8 mg.治疗持续12周,观察治疗前、后血糖、体重等相关指标的变化.结果 利拉鲁肽治疗后,患者的平均空腹血糖下降(3.25±1.04)mmol/L,平均餐后血糖下降(4.97±2.35) mmol/L(P <0.01).平均糖化血红蛋白(Hb) Alc由治疗前的8.15%下降至7.00%,下降了1.15%;有88例(40.00%)及28例患者(12.73%)分别达到HbAlc<7%及HbAlc <6.5%的控制目标.患者平均体重下降8 kg,其中约2/3体重下降5%以上,其余体重下降10%以上.体重下降幅度随基线体重指数(BMI)升高而明显升高,基线BMI越高体重下降越明显(x2=12.102,P=0.017).腰围由治疗前平均96.5 cm下降至89.0 cm(P<0.01).同时患者平均收缩压及舒张压分别下降(5.26±3.11)及(3.10±2.05)mm Hg(1 mm Hg=0.133 kPa,P<0.01).低血糖发生率为2.73%,且无严重低血糖事件发生.结论 在中国2型糖尿病患者中,应用利拉鲁肽单药治疗或与二甲双胍或胰岛素促泌剂联合治疗,可有效控制血糖、减轻体重、降低血压且低血糖风险小.  相似文献   

17.
2型糖尿病患者胰岛素受体酪氨酸激酶域基因突变研究   总被引:2,自引:0,他引:2  
目的 探讨胰岛素受体(INSR)基因变异与2型糖尿病发病的关系。方法 用采PCR-SSCP方法对107例2型糖尿病患者INSR酪氨酸激酶(IRTK)域基因exon17~21)进行突变筛查,并进一步测序确证。结果 检测出13例exon17静止突变;1例exon17静止突变;1例exon20突变,测序确证为coden1191GAC→AAC突变,Asp被Asn代替。结论 IRTK域有突变在中国人2型糖尿病中出现频率较率。Asp^1191→Asn变异对IRTK活性的影响及其在2型糖尿病发病中的作用尚待进一步研究。  相似文献   

18.
Background and aimsThe relation between type 2 diabetes mellitus (T2DM) and erectile dysfunction (ED) has been identified in multiple studies. The aim of this cross-sectional study was to estimate the prevalence and to determine some associated factors of ED among a sample of adult Egyptian male patients with T2DM.MethodsThis cross-sectional study included 150 adult male patients with T2DM (aged 40–60 years) who attended the outpatient clinic of Diabetes in Alexandria Main University hospital. They were evaluated for the presence of ED which was assessed by the validated Arabic-translated five-item version of the International Index of Erectile Function-5 (IIEF-5) questionnaire. Fasting blood glucose (FBG), HbA1c, total serum cholesterol, HDL-C, total serum testosterone (TT) and urinary albumin creatinine ratio (uACR) were measured for all study subjects.ResultsThe prevalence of ED was 80% among the studied sample. Significant negative correlation was found between IIEF-5 score and age, duration of diabetes, FBG and urinary ACR; while there was a significant positive correlation between IIEF-5 score and serum total testosterone. On performing multiple linear regression analysis for the parameters affecting IIEF-5 questionnaire score, TT, urinary ACR, age and FBG were the independent predictors of ED.ConclusionED was a common finding in our sample of Egyptian men with T2DM. Poor glycemic control and albuminuria may be considered as independent risk factors for ED.  相似文献   

19.
目的 探讨胰升糖素受体 (GCG- R)基因在中国人 2型糖尿病遗传背景中的地位。方法 运用聚合酶链反应-变性梯度凝胶电泳 (PCR- DGGE)技术对 2 0 0例无亲缘关系之中国云南昆明地区汉族人 (2型糖尿病患者 12 0例 ,健康对照者 80例 )的 GCG- R基因编码区进行了分子扫查。结果 仅发现 2例 2型糖尿病患者及 1例健康对照者的 GCG- R基因第 7外显子存在多态变异带型 ,这一杂合子多态变异基因型在 2型糖尿病组和对照组中的发生频率分别为 0 .0 17和0 .0 13,两者之间无显著性差异。此外 ,研究对象 GCG- R基因其它编码区的 PCR- DGGE扫查均未发现异常泳动片段。结论  GCG- R基因可能不是中国昆明地区汉族人 2型糖尿病的主要致病基因。  相似文献   

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