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Wang Z, Li X, Xu Q, Yao Y, Li X, Yan H, Lv Q. The Impact of Genetic Polymorphisms on the Anti-Hyperglycemic Effect of Dapagliflozin. Diabetes Metab Syndr Obes 2024; 17:2881-2894. [PMID: 39100970 PMCID: PMC11298192 DOI: 10.2147/dmso.s464671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Accepted: 07/24/2024] [Indexed: 08/06/2024] Open
Abstract
Background The influence of genetic variants on the glucose-lowering effects of dapagliflozin remains unclear. This study aims to investigate the impact of polymorphisms in solute carrier family 5 member 2 (SLC5A2), uridine diphosphate glucuronosyltransferase 1A9 (UGT1A9), solute carrier family 2 member 2 (SLC2A2) and member 4 (SLC2A4) on the anti-hyperglycemic effect of dapagliflozin in patients with type-2 diabetes mellitus (T2DM). Methods A total of 141 patients with T2DM were included in this prospective cohort study. Twenty-nine single nucleotide polymorphisms (SNPs) were selected and genotyped using the Sequenom MassArray platform or Sanger sequencing. Glycated hemoglobin (HbA1c) and fasting blood glucose (FBG) levels were compared before and after the treatment with dapagliflozin. Results Among the 29 SNPs selected, 27 were successfully analyzed. After three months of dapagliflozin treatment, FBG levels were significantly reduced (8.00 mmol/L (5.45-10.71) mmol/L vs 6.40 mmol/L (5.45-9.20) mmol/L, p = 0.003) in patients with T2DM. However, there was no significant change in HbA1c levels (8.10% (6.88-10.00)% vs 8.10% (6.83-10.00)%, p = 0.452). Analysis of covariance showed that patients with the minor allele homozygote or heterozygote of rs12471030 (CT/TT), rs12988520 (AC/CC) or rs2602381 (TC/CC) had higher FBG levels compared to those with the major allele homozygote (p = 0.014, p = 0.024, and p = 0.044, respectively). After adjusting for baseline FBG level, age, gender, body mass index, use of insulin and use of metformin, three SNPs-rs12471030, rs12988520 and rs2602381-were associated with the anti-hyperglycemic effect of dapagliflozin. However, using a stringent significance threshold (p < 0.002 with Bonferroni correction), none of these selected SNPs were significantly associated with FBG and HbA1c levels after dapagliflozin treatment. Conclusion After adjusting for confounding variables, polymorphisms in SLC5A2, UGT1A9, SLC2A2 and SLC2A4 genes were not associated with the anti-hyperglycemic effect of dapagliflozin in the Chinese population. Clinical Trial Registration Number ChiCTR2200059645.
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Affiliation(s)
- Zi Wang
- Department of Pharmacy, Zhongshan Hospital, Fudan University, Shanghai, People’s Republic of China
| | - Xiaoyu Li
- Department of Pharmacy, Zhongshan Hospital, Fudan University, Shanghai, People’s Republic of China
| | - Qing Xu
- Department of Pharmacy, Zhongshan Hospital, Fudan University, Shanghai, People’s Republic of China
| | - Yao Yao
- Department of Pharmacy, Zhongshan Hospital, Fudan University, Shanghai, People’s Republic of China
| | - Xiaoye Li
- Department of Pharmacy, Zhongshan Hospital, Fudan University, Shanghai, People’s Republic of China
| | - Hongmei Yan
- Department of Endocrinology and Metabolism, Zhongshan Hospital, Fudan University, Shanghai, People’s Republic of China
| | - Qianzhou Lv
- Department of Pharmacy, Zhongshan Hospital, Fudan University, Shanghai, People’s Republic of China
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Yu F, Liu F, Li XM, Zhao Q, Luo JY, Zhang JY, Yang YN. GLUT4 gene rs5418 polymorphism is associated with increased coronary heart disease risk in a Uygur Chinese population. BMC Cardiovasc Disord 2022; 22:191. [PMID: 35468725 PMCID: PMC9036804 DOI: 10.1186/s12872-022-02630-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 04/13/2022] [Indexed: 11/19/2022] Open
Abstract
Background To explore possible associations between glucose transporter 4 (GLUT4) genetic polymorphisms in the patients with coronary heart disease (CHD) in Han and Uygur Chinese populations in Xinjiang, China. Methods Two GLUT4 polymorphisms (rs5418 and rs5435) were genotyped in 1262 Han (628 CHD patients and 634 healthy controls) and 896 Uyghur (397 CHD patients and 499 healthy controls) Chinese populations. Results In the Han Chinese population, there were no significant differences in allelic or genotypic distribution of rs5418 and rs5435 between the CHD and control groups (all P > 0.05). However, in the Uygur population, there were significant differences in genotype and allele distributions for rs5418 between CHD and the control group (all P < 0.05). Binary Logistic regression analysis showed that carriers with the rs5418 A allele had a higher risk of CHD compared to carriers of the rs5418 G allele (OR = 1.33, 95% CI: 1.069–1.649, P = 0.01), after adjustment for gender, age, drinking and smoking behavior, hypertension and diabetes. Furthermore, haploid association analysis of the two SNP loci of the GLUT4 gene showed that the AC haplotype was associated with CHD in the Uygur population (P = 0.001598; OR = 1.36, 95% CI = 1.1228–1.6406). Conclusions rs5418 GLUT4 gene variants are associated with CHD in the Uygur Chinese population. Supplementary Information The online version contains supplementary material available at 10.1186/s12872-022-02630-9.
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Affiliation(s)
- Fei Yu
- Xinjiang Key Laboratory of Cardiovascular Disease, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China.,Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China
| | - Fen Liu
- Xinjiang Key Laboratory of Cardiovascular Disease, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China.,Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China
| | - Xiao-Mei Li
- Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China
| | - Qian Zhao
- Xinjiang Key Laboratory of Cardiovascular Disease, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China.,Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China
| | - Jun-Yi Luo
- Xinjiang Key Laboratory of Cardiovascular Disease, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China.,Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China
| | - Jin-Yu Zhang
- Xinjiang Key Laboratory of Cardiovascular Disease, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China.,Rehabilitation Medicine Department, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China
| | - Yi-Ning Yang
- Xinjiang Key Laboratory of Cardiovascular Disease, Clinical Medical Research Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China. .,Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, 830054, People's Republic of China.
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Bappy HJA, Goswami A, Huda N, Hosen MI, Nabi AN. Gender specific association of missense variant rs1805097 of IRS-2 and noncoding variant rs841853 of GLUT-1 genes with susceptibility to type 2 diabetes in Bangladeshi population. GENE REPORTS 2020; 21:100866. [DOI: 10.1016/j.genrep.2020.100866] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Uslu C, Tüz M, Yasan H, Okur E. Investigation of GLUT1, HIF1α and TBX21 Gene Polymorphisms in Laryngeal Cancer. Turk Arch Otorhinolaryngol 2018; 56:70-74. [PMID: 30197802 DOI: 10.5152/tao.2018.3177] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 03/17/2018] [Indexed: 11/22/2022] Open
Abstract
Objective We aimed to investigate the association of the frequency of three single-nucleotide polymorphisms [glucose transporter isoform 1 (GLUT1) reference single-nucleotide polymorphism (rs) 710218, hypoxia-inducible factor 1 alpha (HIF1α) rs11549465, and T-box transcription factor protein 21 (TBX21) rs17250932], which have been proved to be related with various benign and malignant diseases, with the development of laryngeal cancer and its size and grade. Methods In this study, we included 35 patients with laryngeal cancer and 35 volunteers at least 30 years old who had smoked for at least 20 years. DNA was obtained from the blood samples of the participants using an isolation kit. Then, polymorphisms for both the groups were determined using real-time polymerase chain reaction. Results No significant differences were detected regarding the genotype and allele frequencies in the three polymorphisms assessed between the two groups. In the patient group, on examining the association of polymorphisms with tumor size and grade, no significant relation was observed in three polymorphisms regarding the related parameters. Conclusion GLUT1, HIF1α, and TBX21 polymorphisms have no impact on the development of laryngeal cancer.
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Affiliation(s)
- Cihan Uslu
- Department of Otorhinolaryngology-Head and Neck Surgery, Süleyman Demirel University School of Medicine, Isparta, Turkey
| | - Mustafa Tüz
- Department of Otorhinolaryngology-Head and Neck Surgery, Süleyman Demirel University School of Medicine, Isparta, Turkey
| | - Hasan Yasan
- Department of Otorhinolaryngology-Head and Neck Surgery, Süleyman Demirel University School of Medicine, Isparta, Turkey
| | - Erdoğan Okur
- Department of Otorhinolaryngology-Head and Neck Surgery, Süleyman Demirel University School of Medicine, Isparta, Turkey
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Farzan SF, Gossai A, Chen Y, Chasan-Taber L, Baker E, Karagas M. Maternal arsenic exposure and gestational diabetes and glucose intolerance in the New Hampshire birth cohort study. Environ Health 2016; 15:106. [PMID: 27825389 PMCID: PMC5101688 DOI: 10.1186/s12940-016-0194-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 10/29/2016] [Indexed: 05/18/2023]
Abstract
BACKGROUND Gestational diabetes mellitus (GDM) is a major pregnancy complication with detrimental effects for both mothers and their children. Accumulating evidence has suggested a potential role for arsenic (As) exposure in the development of GDM, but current studies have not assessed As exposure from water, urine or toenail samples. METHODS We investigated the association between As exposure and risk of glucose intolerance and GDM among 1151 women enrolled in the New Hampshire Birth Cohort Study. Arsenic was measured in home well water and via biomarkers (i.e., maternal urine collected ~24-28 weeks gestation and toenail clippings collected 2 weeks postpartum). RESULTS A total of 105 (9.1 %) of women were diagnosed with glucose intolerance and 14 (1.2 %) of women were diagnosed with GDM. A total of 10.3 % of women had water As levels above 10 μg/L, with a mean As level of 4.2. Each 5 μg/L increase in As concentration in home well water was associated with a ~10 % increased odds of GDM (OR: 1.1, 95 % CI 1.0, 1.2). A positive and statistically significant association also was observed between toenail As and GDM (OR: 4.5, 95 % CI 1.2, 16.6), but not urinary arsenic (OR: 0.8, 95 % CI 0.3, 2.4). In a stratified analysis, the association between water As and GDM and glucose intolerance was largely limited to obese women (OR: 1.7, 95 % CI 1.0, 2.8). CONCLUSIONS Our findings support the role of As exposure via water from private wells in the incidence of GDM and that this association may be modified by body composition.
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Affiliation(s)
- Shohreh F. Farzan
- Division of Environmental Health, Department of Preventive Medicine, Keck School of Medicine of University of Southern California, 2001 N. Soto Street, MC 9237, Los Angeles, CA 90089 USA
| | - Anala Gossai
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Lebanon, NH USA
| | - Yu Chen
- Department of Population Health, New York University School of Medicine, New York, NY USA
| | - Lisa Chasan-Taber
- Department of Biostatistics & Epidemiology, School of Public Health & Health Sciences, University of Massachusetts, Amherst, MA USA
| | - Emily Baker
- Department of Obstetrics and Gynecology, Geisel School of Medicine at Dartmouth, Lebanon, NH USA
| | - Margaret Karagas
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Lebanon, NH USA
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Villegas R, Delahanty R, Williams S, Li H, O'Brian R, Shi J, Cai Q, Xiang YB, Shu XO. Genetic Variation and Insulin Resistance in Middle-Aged Chinese Men. Ann Hum Genet 2015; 79:357-365. [PMID: 26252243 PMCID: PMC4949159 DOI: 10.1111/ahg.12124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 04/09/2015] [Indexed: 12/27/2022]
Abstract
We investigated the effect of variants in the first three genes in the insulin signaling pathway and genes identified from genome wide association studies (GWAS) of T2D quantitative traits with IR (fasting insulin and the homeostasis model assessment of IR, HOMA-IR) and evaluated gene-environment interactions with IR traits among 1879 nondiabetic middle-aged men from a population-based study conducted in Shanghai, China. One candidate gene, IGF1, was associated with fasting insulin and HOMA-IR. We observed four BMI-gene interactions (P < 0.05) with HOMA-IR (INRS rs7254060, INRS rs7254358, GLU4 rs2113050, and GLU4 rs7713127) and seven BMI-gene interactions with fasting insulin (INRS rs7254060, INRS rs7254358, INRS rs10417205, INRS rs1799817, GLU4 rs12054720 GLU4 rs2113050, and GLU4 rs7713127). There were four WHR-gene interactions with HOMA-IR (INRS rs10417205, INRS rs12971499, INRS rs7254060, and INRS rs7254358), five WHR-gene interactions with fasting insulin (INRS rs10417205, INRS rs7254060, INRS rs7254358, GLU4 rs2113050, and GLU4 rs7713127), eight physical activity-gene interactions with HOMA-IR (INRS rs10411676, INRS rs11671297, INRS rs2229431, INRS rs12461909, INRS rs6510950, INRS rs10420382, IRS2 rs913949, and IRS2 rs2241745) and five physical activity-gene interactions with fasting insulin (INRS rs2229431, INRS rs12461909, INRS rs10420382, IRS2 rs913949, and IRS2 rs2241745). Our results suggest that BMI, WHR and physical activity may modify IR-associated variants.
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Affiliation(s)
- Raquel Villegas
- Vanderbilt Epidemiology Center, Department of Medicine, Vanderbilt University Medical Center, TN, USA
| | - Ryan Delahanty
- Vanderbilt Epidemiology Center, Department of Medicine, Vanderbilt University Medical Center, TN, USA
| | - Scott Williams
- Geisel School of Medicine, Dartmouth College, Hanover, NH, USA
| | - Honglan Li
- Department of Epidemiology, Shanghai Cancer Institute, Shanghai, P.R. China
| | - Richard O'Brian
- Department of Molecular Physiology & Biophysics, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Jiajun Shi
- Vanderbilt Epidemiology Center, Department of Medicine, Vanderbilt University Medical Center, TN, USA
| | - Qiuyin Cai
- Vanderbilt Epidemiology Center, Department of Medicine, Vanderbilt University Medical Center, TN, USA
| | - Yong-Bing Xiang
- Department of Epidemiology, Shanghai Cancer Institute, Shanghai, P.R. China
| | - Xiao Ou Shu
- Vanderbilt Epidemiology Center, Department of Medicine, Vanderbilt University Medical Center, TN, USA
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Du B, Liu S, Cui C, Wang S, Cui W. Association between glucose transporter 1 rs841853 polymorphism and type 2 diabetes mellitus risk may be population specific (1rs8418532). J Diabetes 2013; 5:291-9. [PMID: 23480298 DOI: 10.1111/1753-0407.12042] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 02/27/2013] [Accepted: 03/06/2013] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND So far, studies on the association between the glucose transporter 1 (GLUT1) rs841853 polymorphism and type 2 diabetes mellitus (T2DM) risk have generated considerable controversy. The present study was performed to clarify the association of this genetic variation with T2DM. METHODS A comprehensive literature search of electronic databases was conducted to obtain articles focused on the relationship between the GLUT1 rs841853 polymorphism and T2DM, followed by a systemic meta-analysis. RESULTS Fourteen articles and 19 individual studies were included for analysis. Main analyses revealed extreme heterogeneity and random effect pooled odds ratios (OR) were weakly significant in allele contrast (OR 1.28; 95% confidence interval [CI] 1.01, 1.63; P=0.04) and dominant model (OR 1.52; 95% CI 1.19, 1.94; P=0.0008) for T allele. Subgroup analyses for Caucasians showed marginal positive results in the dominant model. However, analyses for Asians yielded an obvious relationship to T2DM risk in all genetic models. Interestingly, T allele even seemed to be a protective factor against the development of T2DM in Blacks in allele contrast. Sensitivity analyses did not alter materially for most comparisons and no publication bias was found in this meta-analysis. CONCLUSIONS The results of the present meta-analysis provide evidence that the GLUT1 rs841853 polymorphism may confer increased susceptibility to T2DM in Asians. However, there is no currently available strong evidence supporting the association between this genetic variation and T2DM in Caucasians, Blacks, or the overall population.
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Affiliation(s)
- Bing Du
- Second Division of the First Hospital, Jilin University, Changchun, China
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Xia X, Hu Y, Xu L, Chen T. A functional promoter polymorphism ofSLC2A4is associated with aerobic endurance in a Chinese population. Eur J Sport Sci 2012; 14:53-9. [DOI: 10.1080/17461391.2012.726652] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ng ZX, Kuppusamy UR, Tajunisah I, Fong KCS, Chua KH. Investigation of SLC2A1 26177A/G gene polymorphism via high resolution melting curve analysis in Malaysian patients with diabetic retinopathy. J Diabetes Complications 2012; 26:388-92. [PMID: 22795339 DOI: 10.1016/j.jdiacomp.2012.05.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Revised: 05/21/2012] [Accepted: 05/21/2012] [Indexed: 11/29/2022]
Abstract
PURPOSE In this study, we aimed to investigate the possible association between SLC2A1 26177A/G polymorphism and diabetic retinopathy (DR) in Malaysian patients with type 2 diabetes. METHODS Genomic DNA was extracted from 211 Malaysian type 2 diabetic patients (100 without retinopathy [DNR], 111 with retinopathy) and 165 healthy controls. A high resolution melting assay developed in this study was used to detect SLC2A1 26177A/G polymorphism followed by statistical analysis. RESULTS A statistically significant difference in 26177G minor allele frequency between healthy controls (19.7 %) and total patient group (26.1 %) (p<0.05, Odd ratio = 1.437, 95% Confidence interval = 1.015-2.035) as well as between healthy controls (19.7 %) and DNR patients (27.5%) (p<0.05, Odd ratio = 1.546, 95% Confidence interval = 1.024-2.336) was shown in this study. However, when compared between DR and DNR patients, there was no significant difference (p>0.05). CONCLUSIONS This is the first study which shows that SLC2A1 26177G allele is associated with type 2 diabetes in Malaysian population but not with DR.
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Affiliation(s)
- Zhi Xiang Ng
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
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Xi C, Miyaki K, Ikeda S, Song Y, Sinbo T, Muramatsu M. Association of GLUT4 gene variants with HbA1c level in Japanese men. Endocr J 2012; 59:677-84. [PMID: 22673408 DOI: 10.1507/endocrj.ej11-0409] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
GLUT4 is a major mediator of glucose removal from the circulation and a key regulator of whole-body glucose homeostasis. Recent studies in south Indian populations revealed that haplotypes of the GLUT4 gene associated with type 2 diabetes. A total of 734 middle aged apparently healthy Japanese men were recruited from two separate occupational cohorts from Kanagawa and Kyoto. Participants were genotyped for GLUT4 variants, rs5418 (A/G) and rs2654185 (C/A), and association with HbA1c level was analyzed. The HbA1c value was determined by JDS method which is 0.4% lower than NGSP value. The G allele carrier of rs5418 and A allele carrier of rs2654185 associated with significantly higher HbA1c level (AG + GG vs. AA carriers; 5.2 ± 0.8 vs. 4.9 ± 0.4, P < 0.002, and AA + AC vs. CC; 5.2 ± 0.9, vs. 4.9 ± 0.4, P < 0.002, respectively). G allele, AG + GG genotype of rs5418 and A allele, AA + AC genotype of rs2654185 showed a significant association with higher HbA1c (β = 0.215, P = 0.026; β = 0.215, P = 0.026; β = 0.190, P = 0.042; β = 0.190, P = 0.042, respectively). These two SNPs are in high linkage disequilibrium (LD) of r(2) = 0.67. In haplotype analysis, four haplotypes were estimated. HbA1c is significantly higher in the most frequent GA haplotype compared with the second frequent AC haplotype (5.2% vs. 5.1%, P = 0.004). Genetic variations, rs5418 and rs2654185 in GLUT4 gene are associated with HbA1c level in Japanese men.
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Affiliation(s)
- Chen Xi
- Department of Molecular Epidemiology, Medical Research Institute, Tokyo Medical and Dental University, Japan
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Bodhini D, Radha V, Ghosh S, Majumder PP, Rao MRS, Mohan V. GLUT4 gene polymorphisms and their association with type 2 diabetes in south Indians. Diabetes Technol Ther 2011; 13:913-20. [PMID: 21668369 DOI: 10.1089/dia.2010.0219] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND OBJECTIVES The GLUT4 gene, which encodes glucose transporter 4, is a candidate gene for type 2 diabetes mellitus (T2DM). The aim of this study was to screen the GLUT4 gene for polymorphisms and to study association of such polymorphisms with T2DM in an Asian Indian population in southern India. METHODS The GLUT4 gene was sequenced in 25 normal glucose tolerance (NGT) and 25 T2DM subjects, and the variants found were then genotyped by polymerase chain reaction-restriction fragment length polymorphism in a pilot study population of 552 NGT and 643 T2DM subjects, randomly selected from the Chennai Urban Rural Epidemiology Study. Two of the variants (rs5435 and the novel variant), which showed significantly higher minor allele frequency in T2DM compared with NGT individuals in the pilot study population, were then retested with an additional 465 NGT and 363 T2DM subjects, giving a final sample size of 1,017 NGT and 1,006 T2DM subjects. RESULTS Sequencing of the GLUT4 gene revealed three known polymorphisms (rs5418, rs5421, and rs5435) and one novel T→G variant in the 3' untranslated region (UTR) at nucleotide position 6787483. The rs5418 and rs5421 polymorphisms did not show any association with diabetes. The rs5435 [Asn130Asn(C→T)] polymorphism was found to be associated with diabetes, with the odds ratio for the CT+TT genotype being 1.26 (95% confidence interval, 1.00-1.57; P=0.043) when the CC genotype was taken as reference. The frequency of the TG genotype of the novel 3'UTR T→G variant was significantly higher in diabetes subjects (1%) compared with NGT subjects (0.2%) (P=0.021). There was a significant difference in the proportion of the ACGT haplotype of the rs5418(A→G), rs5435(C→T), rs5421(C→G), and the T→G 3'UTR variant between the NGT (7.5%) and diabetes (5%) groups (P=0.003). CONCLUSION The rs5435 (C→T) polymorphism of the GLUT4 gene is associated with type 2 diabetes in this south Indian population.
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Affiliation(s)
- Dhanasekaran Bodhini
- Madras Diabetes Research Foundation, ICMR Advanced Centre for Genomics of Type 2 Diabetes, Chennai, India
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Nair AK, Sugunan D, Kumar H, Anilkumar G. Case-control analysis of SNPs in GLUT4, RBP4 and STRA6: association of SNPs in STRA6 with type 2 diabetes in a South Indian population. PLoS One 2010; 5:e11444. [PMID: 20625434 PMCID: PMC2897881 DOI: 10.1371/journal.pone.0011444] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2010] [Accepted: 06/12/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The inverse relationship between GLUT4 and RBP4 expression is known to play a role in the pathogenesis of type 2 diabetes. Elevated levels of RBP4 were shown to cause insulin resistance in muscles and liver. Identification of STRA6 as a cell surface receptor for RBP4 provides further link in this axis and hence we analyzed SNPs in these three genes for association with type 2 diabetes in a South Indian population. METHODOLOGY/PRINCIPAL FINDINGS Selected SNPs in the three genes were analyzed in a total of 2002 individuals belonging to Dravidian ethnicity, South India, by Tetra Primer ARMS PCR or RFLP PCR. Allele frequencies and genotype distribution were calculated in cases and controls and were analyzed for association by Chi-squared test and Logistic regression. Haplotype analysis was carried out for each gene by including all the markers in a single block. We observed a significant association of three SNPs, rs974456, rs736118, and rs4886578 in STRA6 with type 2 diabetes (P = 0.001, OR 0.79[0.69-0.91], P = 0.003, OR 0.81[0.71-0.93], and P = 0.001, OR 0.74[0.62-0.89] respectively). None of the SNPs in RBP4 and GLUT4 showed any association with type 2 diabetes. Haplotype analysis revealed that two common haplotypes H1 (111, P = 0.001, OR 1.23[1.08-1.40]) and H2 (222, P = 0.002 OR 0.73[0.59-0.89]) in STRA6, H6 (2121, P = 0.006, OR 1.69[1.51-2.48]) in RBP4 and H4 (2121, P = 0.01 OR 1.41[1.07-1.85]) in GLUT4 were associated with type 2 diabetes. CONCLUSION SNPs in STRA6, gene coding the cell surface receptor for RBP4, were significantly associated with type 2 diabetes and further genetic and functional studies are required to understand and ascertain its role in the manifestation of type 2 diabetes.
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Affiliation(s)
- Anup Kumar Nair
- Amrita School of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
| | - Divya Sugunan
- Amrita School of Biotechnology, Amrita Vishwa Vidyapeetham, Kollam, Kerala, India
| | - Harish Kumar
- Amrita Institute of Medical Science, Amrita Vishwa Vidyapeetham, AIMS Kochi, Kerala, India
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Frequency distribution of XbaIG > T and HaeIIIT > C GLUT1 polymorphisms among different Brazilian ethnic groups. Mol Biol Rep 2009; 37:75-9. [PMID: 19347605 DOI: 10.1007/s11033-009-9528-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2008] [Accepted: 03/20/2009] [Indexed: 01/25/2023]
Abstract
GLUT is the major glucose transporter in mammalian cells. Single nucleotide polymorphisms (SNP) at GLUT1 promoter and regulatory regions have been associated to the risk of developing nephropathy in different type 1 and type 2 diabetic populations. It has been demonstrated that differences in allelic and genotypic frequencies of GLUT1 gene (SLC2A1) polymorphisms occur among different populations. Therefore, ethnic differences in distribution of GLUT1 gene polymorphisms may be an important factor in determining gene-disease association. In this study, we investigated the XbaIG > T and HaeIIIT > C polymorphisms in six different Brazilian populations: 102 individuals from Salvador population (Northern Brazil), 56 European descendants from Joinville (South Brazil), 85 Indians from Tiryió tribe (North Brazil) and 127 samples from Southern Brazil: 44 from European descendants, 42 from African descendants and 41 from Japanese descendants. Genotype frequencies from both sites did not differ significantly from those expected under the Hardy-Weinberg equilibrium. We verified that the allele frequencies of both polymorphisms were heterogeneous in these six Brazilian ethnic groups.
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Makni K, Mnif F, Boudawara M, Hamza N, Rekik N, Abid M, Rebaï A, Jarraya F, Granier C, Ayadi H. Association of glucose transporter 1 polymorphisms with type 2 diabetes in the Tunisian population. Diabetes Metab Res Rev 2008; 24:544-8. [PMID: 18613291 DOI: 10.1002/dmrr.866] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND T2DM is a complex metabolic disease. Genetic studies on T2DM have been of little help so far because several genetic association studies have shown conflicting results. In this study, we report the findings of a case-control study on three SNPs in the GLUT1 gene. For this, we investigated the association of GLUT1 genotypes and haplotypes with T2DM. RESEARCH DESIGN AND METHODS All 273 T2DM subjects (cases) and 343 healthy subjects (controls) were genotyped using the polymerase chain reaction restriction fragment length polymorphism. RESULTS Results showed that the GT genotype of XbaI SNP could increase the risk of susceptibility to T2DM to 2.4 and that TAT is a 'risk haplotype' conferring a risk of 3.4 to T2DM. CONCLUSION The TAT haplotype of the GLUT1 gene confers susceptibility to T2DM in the Tunisian population.
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Affiliation(s)
- K Makni
- Research Unit 'Targets for Diagnostic and Therapy of Human Diseases', Centre of Biotechnology of Sfax, and Laboratoire International Associé No 135, Sfax, Tunisia.
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The genetics of gestational diabetes mellitus: evidence for relationship with type 2 diabetes mellitus. Genet Med 2008; 10:240-50. [PMID: 18414206 DOI: 10.1097/gim.0b013e31816b8710] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Gestational diabetes is a major public health problem because of its prevalence, its associated complications during pregnancy, and its increased risk for type 2 diabetes later in life. Insulin resistance is one of many physiological changes occurring during pregnancy, and when insulin resistance is accompanied by pancreatic beta-cell insufficiency, gestational diabetes may develop. Several lines of evidence suggest that gestational diabetes shares a common etiology with type 2 diabetes and support the hypothesis that gestational diabetes serves as a window to reveal a predisposition to type 2 diabetes. Pregnancy is an environmental stressor that may catalyze the progression to a diabetic state in genetically predisposed women; therefore, identification of these women during pregnancy could decrease the occurrence of type 2 diabetes through targeted prevention. This review presents an overview of the genetics of gestational diabetes, focusing on human association studies with candidate genes common to both type 2 diabetes and gestational diabetes.
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Alvarado-Vásquez N, Zapata E, Alcázar-Leyva S, Massó F, Montaño LF. Reduced NO synthesis and eNOS mRNA expression in endothelial cells from newborns with a strong family history of type 2 diabetes. Diabetes Metab Res Rev 2007; 23:559-66. [PMID: 17385193 DOI: 10.1002/dmrr.743] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND A deficient synthesis of nitric oxide (NO) may play a role in the early endothelial dysfunction of healthy humans with a strong family history of type 2 diabetes (DM2). In this study, we evaluate the intracellular synthesis of NO and the expression of eNOS transcripts in human umbilical vein endothelial cells (HUVECs), exposed to high glucose concentrations, of healthy newborns with (experimental) and without (control) a strong family history of DM2. METHODS HUVECs were incubated in M-199 culture media (containing a 5 mmol/L physiological glucose concentration) or supraphysiological glucose concentrations (15 or 30 mmol/L), for 48 h. Flow cytometry, reactive of Griess and RT-PCR were used to determine intracellular NO synthesis, presence of NO metabolites, and expression of eNOS, GLUT1 or p53 transcripts. RESULTS NO synthesis in experimental HUVECs showed a progressive reduction in the presence of increasing glucose concentration (11% for 5 mmol to 8% for 30 mmol; p < 0.01), whereas control HUVECs showed an increase in NO synthesis (3% for 5 mmol to 31% for 30 mmol; p < 0.001). In experimental HUVECs, we found a diminished expression of eNOS and p53, and also an enhanced expression of GLUT1 mRNA transcripts. Control HUVECs showed an increase in eNOS, and no modifications in p53 or GLUT1 mRNA transcripts. CONCLUSIONS Our results show how HUVECs, isolated from healthy newborns with a strong family history of DM2, have an abnormal intracellular synthesis of NO and an impaired expression of eNOS, GLUT1 and p53 genes, all associated with NO synthesis.
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Affiliation(s)
- Noé Alvarado-Vásquez
- Departamento de Bioquímica, Instituto Nacional de Enfermedades Respiratorias, México.
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Kambouris M. Target gene discovery in extended families with type 2 diabetes mellitus. ATHEROSCLEROSIS SUPP 2005; 6:31-6. [PMID: 15823494 DOI: 10.1016/j.atherosclerosissup.2005.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Type 2 diabetes mellitus is a polygenic, multifactorial disease. Multiple attempts have been made to identify genes that predispose to development of diabetes using both the candidate gene approach and whole genome scanning. However, in spite of substantial financial commitment, very few targets have been identified. Identification of predisposing genes is complicated by several factors. Diabetic patients demonstrate a variety of gene defect combinations. Identification of predisposing genomic regions is thus impeded if data are collected from a heterogeneous population. In addition, the diseased phenotype may only manifest when the net effect of the predisposing factors exceeds a certain "threshold". The effects of predisposing genetic and environmental factors thus appear to be additive, and this also complicates target gene discovery. Using the traditional approach, significant associations between genomic regions and disease are rarely observed unless data are acquired from hundreds of individuals. In contrast, results from whole genome scans performed in homogeneous and consanguineous populations with a high incidence of type 2 diabetes have demonstrated that highly significant associations can be obtained using data from a small number of subjects belonging to the same extended family. Such populations offer the promise of substantial progress in type 2 diabetes genomics research.
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Affiliation(s)
- Marios Kambouris
- Synergene Biotechnology Group, Yale University School of Medicine, New Haven, CT, USA.
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Florez JC, Hirschhorn J, Altshuler D. The inherited basis of diabetes mellitus: implications for the genetic analysis of complex traits. Annu Rev Genomics Hum Genet 2003; 4:257-91. [PMID: 14527304 DOI: 10.1146/annurev.genom.4.070802.110436] [Citation(s) in RCA: 201] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Diabetes encompasses a heterogeneous group of diseases, each with a substantial genetic component. We review the division of diabetes into different subtypes based on clinical phenotype, the fruitful pursuit of genes underlying monogenic forms of the disease, the successes and drawbacks of whole-genome linkage scans in type 1 and type 2 diabetes, and the recent identification of several diabetes genes by large association studies. We use the lessons learned from this extensive body of evidence to illustrate general implications for the genetic analysis of complex traits.
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Affiliation(s)
- Jose C Florez
- Diabetes Unit and Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA.
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Gutierrez C, Vendrell J, Pastor R, Broch M, Aguilar C, Llor C, Simon I, Richart C. GLUT1 gene polymorphism in non-insulin-dependent diabetes mellitus: genetic susceptibility relationship with cardiovascular risk factors and microangiopathic complications in a Mediterranean population. Diabetes Res Clin Pract 1998; 41:113-20. [PMID: 9789717 DOI: 10.1016/s0168-8227(98)00050-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
OBJECTIVE It has been suggested that the polymorphic variation of GLUT1 glucose transporter may contribute to genetic susceptibility to type 2 diabetes in some populations. We have evaluated the GLUT1-XbaI polymorphism in an association study of a Caucasian Mediterranean population and its role in the susceptibility to displaying either microangiopathic complications or any of the risk factors associated with type 2 diabetes. RESEARCH DESIGN AND METHODS A total of 193 type 2 diabetic patients (104 women and 89 men, 31-82 years of age, diabetes duration 13.2 +/- 6.2 years) and 90 healthy subjects (48 women and 42 men, 20-72 years of age) were recruited for the association study. For the evaluation of nephropathy and retinopathy, type 2 diabetic patients were matched with those not having microangiopathic complications. RESULTS Genotypic or allelic frequencies did not differ significantly between controls and type 2 diabetic patients. Regarding the distribution of clinical or metabolic parameters according to GLUT1 genotype, patients with X1X1 genotype tended to have higher diastolic blood pressure levels compared with the remaining genotypes (P = 0.008). There were no differences in genotypic or allelic distribution among patients for either the presence or absence of retinopathy or nephropathy. CONCLUSIONS We conclude that GLUT1 loci did not contribute significantly to type 2 diabetes in this cohort and is not a determinant for cardiovascular risk factors or chronic microangiopathic complications associated with type 2 diabetes. The weak association with diastolic hypertension must be confirmed in other populations.
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Affiliation(s)
- C Gutierrez
- Internal Medicine Department, Hospital Universitari Joan XXIII, Universitat Rovira i Virgili, Tarragona, Spain.
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