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Rathnayake KM, Weech M, Lovegrove JA, Jackson KG. Glu298Asp (rs1799983) Polymorphism Influences Postprandial Vascular Reactivity and the Insulin Response to Meals of Varying Fat Composition in Postmenopausal Women: Findings from the Randomized, Controlled Dietary Intervention and VAScular function (DIVAS)-2 Study. J Nutr 2021; 151:848-856. [PMID: 33693945 DOI: 10.1093/jn/nxaa394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/20/2020] [Accepted: 11/16/2020] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND Previous acute studies suggest the Glu298Asp polymorphism (rs1799983) may influence vascular reactivity in response to long-chain n-3 PUFA intake. However, the effects of this genotype on postprandial vascular function after meals rich in SFAs, n-6 PUFAs, and MUFAs are unclear. OBJECTIVES This study determined the impact of the Glu298Asp polymorphism on changes in vascular function and cardiometabolic risk biomarkers in response to sequential meals of varying fat composition. METHODS In a randomized, double-blind, crossover, acute study, 32 postmenopausal women (mean ± SD age: 58 ± 5 y; BMI: 25.9 ± 4.1 kg/m2) consumed mixed meals (breakfast: 0 min, 50 g fat; lunch: 330 min, 30 g fat) containing SFAs, n-6 PUFAs, or MUFAs on 3 occasions. Blood samples for cardiometabolic disease risk markers and real-time measures of vascular reactivity [including flow-mediated dilatation (FMD; primary outcome)] were collected/performed before and regularly for 480 min after breakfast. Participants were retrospectively genotyped for the Glu298Asp (rs1799983) polymorphism. Data were analyzed using linear mixed models. RESULTS For the postprandial %FMD response, a test fat × genotype interaction was observed for the AUC (P = 0.019) but not incremental AUC (IAUC), with the AUC being ∼24% greater after MUFA- than after SFA- and n-6 PUFA-rich meals in the Glu298 homozygotes (P ≤ 0.026). Test fat × genotype interactions were also evident for postprandial insulin (P ≤ 0.005), with the MUFA-rich meals demonstrating significantly higher AUC (12.8%/14.9%), IAUC (14.6%/20.0%), and maximum concentration (20.0%/34.5%) than the SFA- and n-6 PUFA-rich meals, respectively, in Asp298 carriers (P < 0.05). Genotype did not influence other study outcome measures in response to the test fats. CONCLUSIONS Our findings suggest the Glu298Asp polymorphism may represent a potential determinant of the inter-individual variability in postprandial responsiveness of %FMD and insulin to acute meal fat composition in postmenopausal women. Further studies are required to confirm these observations.This trial was registered at clinicaltrials.gov as NCT02144454.
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Affiliation(s)
- Kumari M Rathnayake
- Hugh Sinclair Unit of Human Nutrition, Institute for Food, Nutrition and Health and Institute for Cardiovascular and Metabolic Research, Department of Food & Nutritional Sciences, University of Reading, Whiteknights, Reading, United Kingdom.,Department of Applied Nutrition, Faculty of Livestock, Fisheries and Nutrition, Wayamba University of Sri Lanka, Makandura, Sri Lanka
| | - Michelle Weech
- Hugh Sinclair Unit of Human Nutrition, Institute for Food, Nutrition and Health and Institute for Cardiovascular and Metabolic Research, Department of Food & Nutritional Sciences, University of Reading, Whiteknights, Reading, United Kingdom
| | - Julie A Lovegrove
- Hugh Sinclair Unit of Human Nutrition, Institute for Food, Nutrition and Health and Institute for Cardiovascular and Metabolic Research, Department of Food & Nutritional Sciences, University of Reading, Whiteknights, Reading, United Kingdom
| | - Kim G Jackson
- Hugh Sinclair Unit of Human Nutrition, Institute for Food, Nutrition and Health and Institute for Cardiovascular and Metabolic Research, Department of Food & Nutritional Sciences, University of Reading, Whiteknights, Reading, United Kingdom
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de Aragão Santos TW, Dos Santos Catena A, da Silva Mattos S, de Lima Filho JL, Gondim Martins DB. The incidence of NOS3 gene polymorphisms on newborns with large and small birth weight. Mol Biol Rep 2020; 47:8545-8552. [PMID: 33063148 DOI: 10.1007/s11033-020-05897-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 10/03/2020] [Indexed: 11/26/2022]
Abstract
The NOS3 gene polymorphisms T-786C, G894T and VNTR 4b/a are associated with a predisposition to the development of Metabolic Syndrome (MetS). The NOS3 gene contributes to a normal pregnancy and fetal development. According to their birthweight, newborns can be classified as: small (SGA), adequate (AGA) or large (LGA) for gestational age. The SGA and LGA present a higher risk of developing disorders related to MetS, both during childhood and adulthood. Therefore, the aim of this work is to relate the incidence of G894T, T-786C and VNTR 4b/a on SGA and LGA newborns and their mothers. 204 blood samples were collected from mothers (102) and the umbilical cords of 102 newborns (SGA = 12; AGA = 47; LGA = 43). The genotyping was performed through PCR-RFLP to evaluate presence of the G894T, T-786C and VNTR 4b/a polymorphisms. A significant difference was found between the groups of newborns in the genotypic frequency of T-786C, but without Hardy-Weinberg equilibrium. The VNTR 4b/a and the G894T polymorphisms showed no significance between the groups. The haplotype analysis showed that the SGA newborns presented the higher frequency of 4aGT (9.8%) and of the 4aTT combination (25.4%), while LGA newborns presented the higher frequency of the 4bTT haplotype (23%). Only the SGA newborns and their mothers presented the 4aTC haplotype. In conclusion, the NOS3 polymorphisms do not appear to be a factor to inadequate birth weight. However, the G894T and VNTR 4b/a polymorphisms, and the haplotype 4aTC, seem to influence the occurrence of SGA.
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Affiliation(s)
- Thaysa Walléria de Aragão Santos
- Molecular Prospection and Bioinformatics Group (ProspecMol), Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco (UFPE), Avenue Professor Moraes Rego, 1235, Cidade Universitária, Recife, Pernambuco, 50670-901, Brazil.
| | - Andriu Dos Santos Catena
- Molecular Prospection and Bioinformatics Group (ProspecMol), Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco (UFPE), Avenue Professor Moraes Rego, 1235, Cidade Universitária, Recife, Pernambuco, 50670-901, Brazil
| | | | - José Luiz de Lima Filho
- Molecular Prospection and Bioinformatics Group (ProspecMol), Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco (UFPE), Avenue Professor Moraes Rego, 1235, Cidade Universitária, Recife, Pernambuco, 50670-901, Brazil
| | - Danyelly Bruneska Gondim Martins
- Molecular Prospection and Bioinformatics Group (ProspecMol), Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco (UFPE), Avenue Professor Moraes Rego, 1235, Cidade Universitária, Recife, Pernambuco, 50670-901, Brazil
- Biochemistry Department, Federal University of Pernambuco (UFPE), Recife, Brazil
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Luo Z, Jia A, Lu Z, Muhammad I, Adenrele A, Song Y. Associations of the NOS3 rs1799983 polymorphism with circulating nitric oxide and lipid levels: a systematic review and meta-analysis. Postgrad Med J 2019; 95:361-371. [PMID: 31138610 DOI: 10.1136/postgradmedj-2019-136396] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 04/15/2019] [Accepted: 05/04/2019] [Indexed: 01/04/2023]
Abstract
BACKGROUND Circulating nitric oxide (NO) and lipid levels are closely associated with coronary artery disease (CAD). It is unclear whether the rs1799983 polymorphism in endothelial nitric oxide synthase (NOS3) gene is associated with plasma levels of NO and lipids. This systematic review and meta-analysis (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) aimed to clarify the relationships between the rs1799983 polymorphism and plasma levels of NO and lipids. METHODS Sixteen studies (2702 subjects) and 59 studies (14 148 subjects) were identified for the association analyses for NO and lipids, respectively. Mean difference (MD) and 95% CI were used to estimate the effects of the rs1799983 polymorphism on plasma NO and lipid levels. The primary outcome variable was NO, and the secondary outcomes included triglycerides, total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C) and high-density lipoprotein cholesterol (HDL-C). RESULTS Carriers of the T allele had lower levels of NO (MD -0.27 μmol/L, 95% CI -0.42 to -0.12 μmol/L, p<0.001) and HDL-C (MD -0.07 mmol/L, 95% CI -0.14 to -0.00 mmol/L, p=0.04), and higher levels of TC (MD 0.13 mmol/L, 95% CI 0.06 to 0.20 mmol/L, p<0.001) and LDL-C (MD 0.14 mmol/L, 95% CI 0.05 to 0.22 mmol/L, p=0.002) than the non-carriers. Triglyceride levels were comparable between the genotypes. CONCLUSION The association between the NOS3 rs1799983 polymorphism and CAD may be partly mediated by abnormal NO and lipid levels caused by the T allele.
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Affiliation(s)
- Zhi Luo
- Department of Cardiology, Affiliated Hospital of North Sichuan Medical College, Nanchong city, Sichuan province, China
| | - Aimei Jia
- School of Preclinical Medicine, North Sichuan Medical College, Nanchong city, Sichuan province, China
| | - Zhan Lu
- Department of Cardiology, Affiliated Hospital of North Sichuan Medical College, Nanchong city, Sichuan province, China
| | - Irfan Muhammad
- Department of Cardiology, Affiliated Hospital of North Sichuan Medical College, Nanchong city, Sichuan province, China
| | - Adebayo Adenrele
- Department of Anatomy, College of Veterinary Medicine, Federal University of Agriculture, Abeokuta, Nigeria
| | - Yongyan Song
- School of Preclinical Medicine, North Sichuan Medical College, Nanchong city, Sichuan province, China
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Meta-Analysis of NOS3 G894T Polymorphisms with Air Pollution on the Risk of Ischemic Heart Disease Worldwide. TOXICS 2018; 6:toxics6030044. [PMID: 30071659 PMCID: PMC6161281 DOI: 10.3390/toxics6030044] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/22/2018] [Accepted: 07/27/2018] [Indexed: 12/19/2022]
Abstract
The purpose of this updated meta-analysis was to investigate the effect of nitric oxide synthase-3 (NOS3) G894T polymorphisms, air pollution and their interaction on ischemic heart disease (IHD) risk across populations worldwide. Recursive partition trees, nonlinear association curve fit and geographic information system maps were incorporated to verify results of conventional pooled analyses for sources of heterogeneity. Results from 61 studies (16,219 cases, 12,222 controls) revealed a significant increased relative risk (RR) of IHD associated with NOS3 894 polymorphisms TT (RR = 1.44) and GT (RR = 1.37). Subgroup analysis revealed that the TT polymorphism genotype had significantly increased risk of IHD in Caucasian, East Asian, South Asian, and Middle Eastern populations (all p < 0.05). It is important to point out that many countries demonstrated an average risk of greater than two, which identifies the NOS3 894 TT polymorphism as a potential causal factor and biological marker of IHD, based on criteria for strong evidence used in international consensus panels. These 10 countries include Ukraine, the United Kingdom, Brazil, Chile, Japan, South Korea, India, Iran, Egypt and Morocco. For these countries with elevated risk (RR > 2) from the NOS3 894 TT polymorphism, meta-predictive analysis demonstrated an increasing trend in air pollution association with increased NOS3 894 polymorphisms. Further studies are needed to explore the complexity of the associations among NOS3 gene polymorphisms per population stratifications within countries, detailed air pollution data for added specificity for geographic location across time, and disease risk.
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Haplotype analysis of endothelial nitric oxide synthase (NOS3) genetic variants and metabolic syndrome in healthy subjects and schizophrenia patients. Int J Obes (Lond) 2018; 42:2036-2046. [PMID: 29907847 PMCID: PMC6291422 DOI: 10.1038/s41366-018-0124-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 04/11/2018] [Accepted: 04/22/2018] [Indexed: 11/18/2022]
Abstract
Background/objectives The frequency of metabolic syndrome (MetS) is significantly higher in schizophrenia (SCH) patients, when compared to the general populatiotin. The goal of this study was to evaluate whether genetic variants T-786C (rs2070744), G894T (rs1799983) and C774T (rs1549758) in the endothelial nitric oxide (NOS3) gene and/or their haplotypes could be associated with the risk of MetS in SCH patients or healthy subjects from Russian population. Subjects/methods We performed two case−control comparisons. NOS3 polymorphisms were genotyped in 70 SCH patients with MetS, 190 normal weight SCH patients, 155 MetS patients, and 100 healthy controls. MetS was defined as per the criteria proposed by the International Diabetes Federation (IDF). Anthropometric, clinical, biochemical parameters, and serum nitrite concentrations were measured in all samples. Haplotype frequency estimations and linkage disequilibrium measures were made using Haploview 4.2. Results The higher C allele (P = 0.009) and lower TT genotype (P = 0.008) frequencies of T-786C polymorphism were found in SCH patients with MetS compared to those in normal weight SCH patients. SCH patients with MetS who were carriers of the T-786C TT genotype had lower serum total cholesterol levels in comparison to the CC genotype (P = 0.016). Furthermore, the 774T/894T haplotype was more frequent in non-SCH individuals with MetS compared to healthy controls (P = 0.0004, odds ratio = 2.18, 95% confidence interval 1.4–3.37). Conversely, the most common haplotype 774C/894G was less frequent in MetS patients than in healthy controls (P = 0.013, odds ratio = 0.61, 95% confidence interval 0.41–0.9). Conclusions These results indicate that the NOS3 T-786C promoter polymorphism was closely associated with MetS risk in SCH patients. In addition, the haplotypes composed of G894T and C774T polymorphisms are associated with the MetS susceptibility in Russian population.
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Chen CH, Wu SH, Tseng YM, Hou MF, Tsai LY, Tsai SM. Distinct role of endothelial nitric oxide synthase gene polymorphisms from menopausal status in the patients with sporadic breast cancer in Taiwan. Nitric Oxide 2018; 72:1-6. [PMID: 29102546 DOI: 10.1016/j.niox.2017.10.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 10/23/2017] [Accepted: 10/24/2017] [Indexed: 12/30/2022]
Abstract
Breast cancer has a high incidence in Taiwanese women and worldwide. Previous studies have indicated that NO has multiple independent roles in carcinogenesis; genetic polymorphisms in the endothelial nitric oxide synthase (eNOS) gene could modify its transcription and endogenous NO production. Previous studies have reported conflicting results for the relationship between polymorphisms in the eNOS gene and breast cancer risk. Estrogen levels are associated with eNOS expression; accordingly, variation in estrogen levels may contribute to the discordant results. Therefore, in this study, the effects of eNOS polymorphisms on breast cancer susceptibility were examined in terms of menopausal status in Taiwanese women. Three eNOS polymorphisms (-786T > C, VNTR, and 894G > T) were genotyped in 283 patients with breast cancer (139 premenopausal and 144 postmenopausal) and 200 cancer-free controls (100 premenopausal and 100 postmenopausal) by PCR-RFLP. There was a significantly higher breast cancer risk in premenopausal women carrying 894G > T T than in those with the 894G > T GG genotype; however, postmenopausal women carrying 894G > T T had a lower risk of developing breast cancer. In addition, based on a binary logistic regression analysis, interaction effects of these polymorphisms differed according to menopausal status. The relationship between eNOS polymorphisms and breast cancer hazard depended on menopause status, especially for the 894G > T polymorphism, which may provide an explanation for previous conflicting results.
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Affiliation(s)
- Chien-Hung Chen
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Szu-Hsien Wu
- Division of Plastic Surgery, Department of Surgery, Taipei Veterans General Hospital and Yang Ming University, Taipei, Taiwan
| | - Yang-Ming Tseng
- Department of Pathology and Laboratory Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Ming-Feng Hou
- Department of Surgery, Faculty of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | - Li-Yu Tsai
- Department of Medical Laboratory Science and Biotechnology, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | - Shih-Meng Tsai
- Department of Public Health and Environmental Medicine, Faculty of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
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Moguib O, Raslan HM, Abdel Rasheed I, Effat L, Mohamed N, El Serougy S, Hussein G, Tawfeek S, AbdelRahman AH, Omar K. Endothelial nitric oxide synthase gene (T786C and G894T) polymorphisms in Egyptian patients with type 2 diabetes. J Genet Eng Biotechnol 2017; 15:431-436. [PMID: 30647683 PMCID: PMC6296602 DOI: 10.1016/j.jgeb.2017.05.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 03/06/2017] [Accepted: 05/07/2017] [Indexed: 01/08/2023]
Abstract
BACKGROUND Genetic factors play important role in the development of type 2 diabetes and diabetic nephropathy. Endothelial nitric oxide synthase (eNOS) gene is responsible for the bioavailability of nitric oxide and endothelial function. AIM To assess the association of the endothelial nitric oxide synthase (eNOS) (T786C and G894T) single nucleotide polymorphisms with Egyptian type 2 diabetes mellitus and diabetic nephropathy. PATIENTS AND METHODS A total of 200 type 2 diabetic patients and 100 apparently healthy volunteers as controls were included in the study. They were subjected to clinical examination and laboratory tests: fasting blood glucose, HBA1C, lipid profile, serum creatinine, blood urea and albumin creatinine ratio (ACR). Assessment of the T786C and G894T polymorphisms in the eNOS gene was done using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). RESULTS There was no significant difference in distribution of eNOS T-786C polymorphism between patients and controls; TT genotype of eNOS G894T was more frequent in diabetic patients with and without albuminuria compared to controls. Patients were divided into 3 groups according to ACR. Normoalbuminuria: 37 patients with ACR ≤ 30 mg/g, microalbuminuria: 96 patients with ACR > 30 mg/g and ≤ 300 mg/g, and macroalbuminuria: 67 patients with ACR > 300 mg/g. There was no significant difference in genotype distribution of eNOS T-786C between the 3 groups of diabetic patients. The prevalence of TT genotype of eNOS G894T was higher in microalbuminuria patients compared to other groups. CONCLUSION eNOS G894T variant may increase risk of type 2 diabetes with lack of association between eNOS T786C, eNOS G894T and DN in Egyptians.
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Affiliation(s)
- Omneya Moguib
- Internal Medicine Department, National Research Center, Egypt
| | - Hala M. Raslan
- Internal Medicine Department, National Research Center, Egypt
| | - Inas Abdel Rasheed
- Clinical and Chemical Pathology Department, National Research Center, Egypt
| | - Laila Effat
- Molecular Genetic Department, National Research Center, Egypt
| | - Nadia Mohamed
- Medical Biochemistry Department, National Research Center, Egypt
| | - Safaa El Serougy
- Occupational Health and Industrial Medicine Department, National Research Centre, Egypt
| | - Ghada Hussein
- Clinical and Chemical Pathology Department, National Institute of Diabetes and Endocrinology, Egypt
| | - Salwa Tawfeek
- Internal Medicine Department, National Research Center, Egypt
| | | | - Khalda Omar
- Molecular Genetic Department, National Research Center, Egypt
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Fattakhov NS, Skuratovskaya DA, Vasilenko MA, Kirienkova EV, Zatolokin PA, Mironyuk NI, Litvinova LS. Association of Glu298Asp Polymorphism of Endothelial NO Synthase Gene with Metabolic Syndrome Development: a Pilot Study. Bull Exp Biol Med 2017; 162:615-618. [PMID: 28361419 DOI: 10.1007/s10517-017-3670-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Indexed: 10/19/2022]
Abstract
We studied association of single nucleotide polymorphism Glu298Asp (rs1799983) of the NOS3 gene with the risk of metabolic syndrome in the Slavic population. Blood samples were obtained from 128 patients with metabolic syndrome and 100 healthy individuals. Polymorphism Glu298Asp of the NOS3 gene was genotyped by allele-specific PCR. Allele Asp (OR=1.95, 95%CI 1.29-2.95, p=0.007) and genotype Asp/Asp (OR=2.56, 95%CI 0.98-6.72, p=0.04) were associated with the risk of metabolic syndrome in Slavic population. Patients with metabolic syndrome carrying genotype Asp/Asp had higher serum endothelin-1 level in comparison with Glu/Asp and Glu/Glu carriers.
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Affiliation(s)
- N S Fattakhov
- Immanuel Kant Baltic Federal University, Kaliningrad, Russia. .,Mental Health Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences, Tomsk, Russia.
| | | | - M A Vasilenko
- Immanuel Kant Baltic Federal University, Kaliningrad, Russia
| | - E V Kirienkova
- Immanuel Kant Baltic Federal University, Kaliningrad, Russia
| | - P A Zatolokin
- Regional Hospital of the Kaliningrad Region, Kaliningrad, Russia
| | - N I Mironyuk
- Regional Hospital of the Kaliningrad Region, Kaliningrad, Russia
| | - L S Litvinova
- Immanuel Kant Baltic Federal University, Kaliningrad, Russia
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Dellamea BS, Leitão CB, Friedman R, Canani LH. Nitric oxide system and diabetic nephropathy. Diabetol Metab Syndr 2014; 6:17. [PMID: 24520999 PMCID: PMC3928920 DOI: 10.1186/1758-5996-6-17] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 02/04/2014] [Indexed: 01/09/2023] Open
Abstract
About 30% of patients with type 2 diabetes mellitus develop clinically overt nephropathy. Hyperglycemia is necessary, but not sufficient, to cause the renal damage that leads to kidney failure. Diabetic nephropathy (DN) is a multifactorial disorder that results from interaction between environmental and genetic factors. In the present article we will review the role of the nitric oxide synthase (NOS) in the pathogenesis of DN.Nitric oxide (NO) is a short-lived gaseous lipophilic molecule produced in almost all tissues, and it has three distinct genes that encode three NOS isoforms: neuronal (nNOS), inducible (iNOS) and endothelial (eNOS).The correct function of the endothelium depends on NO, participating in hemostasis control, vascular tone regulation, proliferation of vascular smooth muscle cells and blood pressure homeostasis, among other features. In the kidney, NO plays many different roles, including control of renal and glomerular hemodynamics. The net effect of NO in the kidney is to promote natriuresis and diuresis, along with renal adaptation to dietary salt intake.The eNOS gene has been considered a potential candidate gene for DN susceptibility. Three polymorphisms have been extensively researched: G894T missense mutation (rs1799983), a 27-bp repeat in intron 4, and the T786C single nucleotide polymorphism (SNP) in the promoter (rs2070744). However, the potential link between eNOS gene variants and the induction and progression of DN yielded contradictory results in the literature.In conclusion, NOS seems to be involve in the development and progression of DN. Despite the discrepant results of many studies, the eNOS gene is also a good candidate gene for DN.
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Affiliation(s)
| | - Cristiane Bauermann Leitão
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Endocrine Division of Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Rogério Friedman
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Endocrine Division of Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Luis Henrique Canani
- Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- Endocrine Division of Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
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Lee Y, Huang S, Liu C, Yang Y, Yeh H, Li W, Wu W, Wang C, Juan Y, Huang C, Hour T, Chang C, Huang C. The Association of eNOS G894T Polymorphism with Metabolic Syndrome and Erectile Dysfunction. J Sex Med 2012; 9:837-43. [DOI: 10.1111/j.1743-6109.2011.02588.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Alkharfy KM, Al-Daghri NM, Al-Attas OS, Alokail MS, Mohammed AK, Vinodson B, Clerici M, Kazmi U, Hussain T, Draz HM. Variants of endothelial nitric oxide synthase gene are associated with components of metabolic syndrome in an Arab population. Endocr J 2012; 59:253-63. [PMID: 22240891 DOI: 10.1507/endocrj.ej11-0278] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Genetics plays a crucial role in the development of metabolic syndrome (MetS). Here we examined the association between endothelial nitric oxide synthase (eNOS) gene polymorphisms and MetS in a Saudi Arabian cohort to extend the understanding of the genetic basis of MetS in diverse ethnic populations. Anthropometric, clinical and biochemical parameters as well as genotyping for 894G>T, -786T>C variants of eNOS gene by PCR-RFLP and 4a/b by direct PCR were performed in 886 Saudi Arabians (477 MetS and 409 Non-MetS). The genotype distribution (TT, p=0.001; TC, p=0.001; TC+CC, p=0.001) and allele (T, p=0.007; C, p=0.007) frequency of the -786T>C SNP were significantly different between Non-MetS and MetS subjects which remained significant after Bonferroni correction. Moreover: 1) the GT and GT+TT genotypes of the 894G>T SNP were associated with elevated blood pressure (p=0.017, and p=0.022, respectively); 2) the ab variant of 4a/b polymorphism was associated with decreased HDL levels (p= 0.044); and 3) the TC+CC genotype and C allele of the -786T>C SNP were associated with increased fasting glucose levels (p=0.039, and p=0.028, respectively). Also, G-a-C was identified as the risk haplotype for MetS susceptibility (p=0.034). The results suggest a significant association of 894G>T, 4a/b and -786T>C polymorphisms with MetS and its components is present in an Arab population. A genetic predisposition to develop abnormal metabolic phenotypes, consistent with an increased prevalence of metabolic phenotypes can be detected in this ethnic group.
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Affiliation(s)
- Khalid M Alkharfy
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.
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Piccoli JCE, Gottlieb MGV, Castro L, Bodanese LC, Manenti ERF, Bogo MR, Peres A, Rocha MIUMD, Cruz IBMD. Association between 894G>T endothelial nitric oxide synthase gene polymorphisms and metabolic syndrome. ACTA ACUST UNITED AC 2009; 52:1367-73. [PMID: 19169496 DOI: 10.1590/s0004-27302008000800027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2008] [Accepted: 10/16/2008] [Indexed: 01/05/2023]
Abstract
Metabolic syndrome (MS) is a cluster of cardiovascular risk factors such as hypertension, dyslipidemia, obesity and type II diabetes. Here, we performed a case-control study analyzing the association between 894G>T endothelial nitric oxide synthase gene polymorphism (NOS3) and MS in 616 subjects. Genotype frequencies were TT= 9.3%, GG= 37.2 and TG= 53.6% and the allelic frequencies were T=0.36 and G= 0.64. We observed a higher TT genotype frequency in the male MS group than control subjects (p=0.02), independent of other variables. We found an association between hypertension and TT genotype in females. Our data suggests that 894G>T plays a significant role in the mechanistic interaction between metabolic risk such as hypertension and MS, although sex-related differences may exist.
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