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Chaichanabut C, Sritara P, Sirivarasai J. Genetic Polymorphisms of Endothelial Nitric Oxide Synthase Associated with Hypertension and Blood Homocysteine Levels. Int J Gen Med 2024; 17:1509-1519. [PMID: 38660143 PMCID: PMC11041984 DOI: 10.2147/ijgm.s456519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 04/09/2024] [Indexed: 04/26/2024] Open
Abstract
Purpose Endothelial dysfunction is a key mechanism in the development of hypertension and is closely linked to impairment of endothelial nitric oxide synthase (eNOS) and hyperhomocysteinemia. Genetic polymorphisms of eNOS (rs1799983 and rs2070744) are strongly associated with the risk of hypertension in individuals of Asian ethnicities. This study aimed to investigate the relationship between these polymorphisms and the risk of hypertension associated with homocysteine levels. Participants and Methods For this cross-sectional study, we enrolled 370 Thai men aged 40-60 years from the Electricity Generating Authority of Thailand cohort study for both variants genotyping by TaqMan allelic discrimination analysis. Clinical, anthropometric, and biochemical parameters were also analyzed. Results In the high blood pressure group (n = 267), systolic and diastolic blood pressure and triglyceride levels were higher in those with homocysteine levels ≥ 15 µmol/L than in those with homocysteine levels < 15 µmol/L (p < 0.05). Significant risk of hypertension was found in GG and GT of rs1799983 (G894T), and in TT and TC of rs2070744 (T-786C), with higher ORs in heterozygous genotypes (all p values < 0.05). Further evaluation of the interactions between SNPs and HCY revealed that individuals with the GT or TC genotype, together with hyperhomocysteinemia, had an increased risk of hypertension (all p<0.05). Conclusion eNOS variants rs1799983 and rs2070744 may be risk factors for hypertension linked to hyperhomocysteinemia. These findings provide potentially useful healthcare strategies for the management of hypertension.
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Affiliation(s)
- Charinya Chaichanabut
- Master of Science Program in Nutrition, Faculty of Medicine Ramathibodi Hospital and Institute of Nutrition, Mahidol University, Bangkok, Thailand
| | - Piyamitr Sritara
- Department of Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Jintana Sirivarasai
- Nutrition Unit, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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Vecoli C, Caselli C, Modena M, Todiere G, Poddighe R, Valente S, Bandini F, Natali A, Ghiadoni L, Clerico A, Prontera C, Vittorini S, Botto N, Emdin M, Neglia D. Low HDL cholesterol and the eNOS Glu298Asp polymorphism are associated with inducible myocardial ischemia in patients with suspected stable coronary artery disease. BMC Cardiovasc Disord 2024; 24:176. [PMID: 38519897 PMCID: PMC10958845 DOI: 10.1186/s12872-024-03846-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 03/15/2024] [Indexed: 03/25/2024] Open
Abstract
BACKGROUND The endothelial nitric oxide synthase (eNOS) gene deficiency is known to cause impaired coronary vasodilating capability in animal models. In the general clinical population, the eNOS gene polymorphisms, able to affect eNOS activity, were associated with cardiometabolic risk features and prevalence of coronary artery disease (CAD). AIM To investigate the association of eNOS Glu298Asp gene polymorphism, cardiometabolic profile, obstructive CAD and inducible myocardial ischemia in patients with suspected stable CAD. METHODS A total of 506 patients (314 males; mean age 62 ± 9 years) referred for suspected CAD was enrolled. Among these, 325 patients underwent stress ECG or cardiac imaging to assess the presence of inducible myocardial ischemia and 436 patients underwent non-invasive computerized tomography or invasive coronary angiography to assess the presence of obstructive CAD. Clinical characteristics and blood samples were collected for each patient. RESULTS In the whole population, 49.6% of patients were homozygous for the Glu298 genotype (Glu/Glu), 40.9% heterozygotes (Glu/Asp) and 9.5% homozygous for the 298Asp genotype (Asp/Asp). Obstructive CAD was documented in 178/436 (40.8%) patients undergoing coronary angiography while myocardial ischemia in 160/325 (49.2%) patients undergoing stress testing. Patients with eNOS Asp genotype (Glu/Asp + Asp/Asp) had no significant differences in clinical risk factors and in circulating markers. Independent predictors of obstructive CAD were age, gender, obesity, and low HDL-C. Independent predictors of myocardial ischemia were gender, obesity, low HDL-C and Asp genotype. In the subpopulation in which both stress tests and coronary angiography were performed, the Asp genotype remained associated with increased myocardial ischemia risk after adjustment for obstructive CAD. CONCLUSION In this population, low-HDL cholesterol was the only cardiometabolic risk determinant of obstructive CAD. The eNOS Glu298Asp gene polymorphism was significantly associated with inducible myocardial ischemia independently of other risk factors and presence of obstructive CAD.
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Affiliation(s)
- Cecilia Vecoli
- Institute of Clinical Physiology-CNR, Via G. Moruzzi 1, Pisa, Italy.
- Cardiovascular Department, Gabriele Monasterio Foundation, Via G. Moruzzi 1, Pisa, Italy.
| | - Chiara Caselli
- Institute of Clinical Physiology-CNR, Via G. Moruzzi 1, Pisa, Italy
- Cardiovascular Department, Gabriele Monasterio Foundation, Via G. Moruzzi 1, Pisa, Italy
| | | | - Giancarlo Todiere
- Cardiovascular Department, Gabriele Monasterio Foundation, Via G. Moruzzi 1, Pisa, Italy
| | - Rosa Poddighe
- Ospedale Della Versilia, Lido Di Camaiore, Lucca, Italy
| | | | | | - Andrea Natali
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Lorenzo Ghiadoni
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Aldo Clerico
- Cardiovascular Department, Gabriele Monasterio Foundation, Via G. Moruzzi 1, Pisa, Italy
| | - Concetta Prontera
- Cardiovascular Department, Gabriele Monasterio Foundation, Via G. Moruzzi 1, Pisa, Italy
| | - Simona Vittorini
- Cardiovascular Department, Gabriele Monasterio Foundation, Via G. Moruzzi 1, Pisa, Italy
| | - Nicoletta Botto
- Cardiovascular Department, Gabriele Monasterio Foundation, Via G. Moruzzi 1, Pisa, Italy
| | - Michele Emdin
- Cardiovascular Department, Gabriele Monasterio Foundation, Via G. Moruzzi 1, Pisa, Italy
- Sant'Anna School of Advanced Studies, Pisa, Italy
| | - Danilo Neglia
- Cardiovascular Department, Gabriele Monasterio Foundation, Via G. Moruzzi 1, Pisa, Italy.
- Sant'Anna School of Advanced Studies, Pisa, Italy.
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The Role of Single-Nucleotide Variants of NOS1, NOS2, and NOS3 Genes in the Comorbidity of Arterial Hypertension and Tension-Type Headache. Molecules 2021; 26:molecules26061556. [PMID: 33809023 PMCID: PMC8002043 DOI: 10.3390/molecules26061556] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/06/2021] [Accepted: 03/09/2021] [Indexed: 12/13/2022] Open
Abstract
Patients with tension-type headache (TTH) have an increased risk of developing arterial hypertension (AH), while hypertensive subjects do seem to have an increased risk of TTH. We searched for full-text English publications in databases using keywords and combined word searches over the past 15 years. In addition, earlier publications of historical interest were included in the review. In our review, we summed up the single nucleotide variants (SNVs) of Nitric Oxide Synthases (NOSs) genes involved in the development of essential AH and TTH. The results of studies we discussed in this review are contradictory. This might be due to different designs of the studies, small sample sizes in some of them, as well as different social and geographical characteristics. However, the contribution of genetic and environmental factors remains understudied. This makes the issue interesting for researchers, as understanding these mechanisms can contribute to a search for new approaches to pathogenetic and disease-modifying treatment of the AH and TTH phenotype. New drugs against AH and TTH can be based on inhibition of nitric oxide (NO) production, blockade of steps in the NO-cGMP pathway, or NO scavenging. Indeed, selective neuronal NOS (n-NOS) and inducible NOS (i-NOS) inhibitors are already in early clinical development.
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Chen Y, Chen L, Zhou Q. Genetic association between eNOS gene polymorphisms and risk of carotid atherosclerosis : A meta-analysis. Herz 2020; 46:253-264. [PMID: 33095272 DOI: 10.1007/s00059-020-04995-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/20/2020] [Accepted: 09/25/2020] [Indexed: 01/25/2023]
Abstract
BACKGROUND Endothelial nitric oxide synthase (eNOS) has been reported to be involved in the atherosclerotic process. A number of studies have investigated the association between eNOS gene polymorphisms and the risk of carotid atherosclerosis (CAS). However, the results are conflicting and inconclusive. The aim of this study was to evaluate precisely the association between the eNOS T786C, G894T, and 4a/4b polymorphisms and CAS risk. MATERIAL AND METHODS A meta-analysis was carried out by retrieving relevant studies from PubMed, Embase, China National Knowledge Infrastructure (CNKI), and Cochrane databases without a restriction on publication year. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were used to describe the strength of the association with CAS. RESULTS Data were obtained from eight case-control studies comprising 2975 cases and 2624 controls. Significant associations were detected between the allelic and recessive models of the eNOS T786C polymorphism (allelic: p = 0.04; OR, 95% CI = 1.57 [1.01, 2.44]; recessive: p = 0.03; OR, 95% CI = 1.53 [1.04, 2.24]), as well as the allelic and dominant models of the eNOS 4a/4b polymorphism, and CAS risk in an Asian subgroup (allelic: p = 0.02; OR, 95% CI = 1.49 [1.07, 2.07]; dominant: p = 0.01; OR, 95% CI = 1.50 [1.09, 2.05]), but not in a Caucasian subgroup (p > 0.05). No association was observed between the eNOS G894T polymorphism and CAS risk (p > 0.05). CONCLUSION Our study provides evidence that the allelic and recessive models of the eNOS T786C polymorphism and the allelic and dominant models of the eNOS 4a/4b polymorphism may increase the risk of CAS in Asian populations.
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Affiliation(s)
- Yongheng Chen
- Department of Cardiology, The First Affiliated Hospital, Changsha Medical University, 410219, Changsha, China
| | - Lin Chen
- Department of Cardiology, The First Affiliated Hospital, Changsha Medical University, 410219, Changsha, China
| | - Qiliang Zhou
- Department of Human Anatomy, School of Basic Medical Science, Changsha Medical University, 410219, Changsha, China.
- Department of Human Anatomy, Histology and Embryology, Institute of Neuroscience, Changsha Medical University, 410219, Changsha, China.
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Cotta Filho CK, Oliveira-Paula GH, Rondon Pereira VC, Lacchini R. Clinically relevant endothelial nitric oxide synthase polymorphisms and their impact on drug response. Expert Opin Drug Metab Toxicol 2020; 16:927-951. [DOI: 10.1080/17425255.2020.1804857] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | | | | | - Riccardo Lacchini
- Department of Psychiatric Nursing and Human Sciences, University of Sao Paulo, Ribeirao Preto, Brazil
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Aouf S, Laribi A, Gabbouj S, Hassen E, Bouaouinaa N, Zakhama A, Harizi H. Contribution of Nitric oxide synthase 3 genetic variants to nasopharyngeal carcinoma risk and progression in a Tunisian population. Eur Arch Otorhinolaryngol 2019; 276:1231-1239. [PMID: 30758659 DOI: 10.1007/s00405-019-05333-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Accepted: 02/05/2019] [Indexed: 10/27/2022]
Abstract
PURPOSE We conduct this study to evaluate the clinical and functional impact of Nitric Oxide Synthase 3 (NOS3) T-786C and G894T genetic variants on nasopharyngeal carcinoma (NPC) risk and progression in a Tunisian population. METHODS 259 NPC patients and 169 healthy controls were enrolled into our case-control study. Blood samples were genotyped by the RFLP-PCR analysis. The levels of Nitric oxide (NO) were measured by a colorimetric assay kit in the plasma of NPC patients, healthy controls and according to NOS3 genotypes. The correlation between the NOS3 variants and the clinicopathological parameters was examined. RESULTS We found no linkage disequilibrium between NOS3 T-786C and G894T variants. These results showed that NOS3 variants were genetically independent. In contrast to NOS3 T-786C, a significant association was found between NOS3 G894T polymorphism and NPC risk. The 894T allele decreased significantly in NPC patients and appeared as protective factor (OR = 0.65, CI 95%= 0.48-0.88, p = 0.006). NPC patients had significantly higher levels of plasma NO as compared to healthy controls (p = 0.0011). The T-786C mutation reduced the levels of plasma NO and decreased risk of lymph node metastasis in NPC patients (OR = 0.64, 95% CI = 0.43-0.96; p = 0.03). In contrast, NOS3 G894T polymorphism had no effects neither on NO plasma levels nor clinical parameters. CONCLUSIONS This is the first study to associate NPC with significantly higher levels of plasma NO. NOS3-derived NO could play key roles in NPC pathogenesis. NOS3 variants differently contribute to NPC risk and progression in a Tunisian population. NOS3 G894T was associated with NPC risk. NOS3 T-786C decreased the levels of plasma NO and reduced the development of regional lymph node metastasis.
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Affiliation(s)
- Sahar Aouf
- Laboratory of Molecular Immuno-Oncology, Faculty of Medicine of Monastir, University of Monastir, 5019, Monastir, Tunisia
| | - Ala Laribi
- Laboratory of Molecular Immuno-Oncology, Faculty of Medicine of Monastir, University of Monastir, 5019, Monastir, Tunisia
| | - Sallouha Gabbouj
- Laboratory of Molecular Immuno-Oncology, Faculty of Medicine of Monastir, University of Monastir, 5019, Monastir, Tunisia
| | - Elham Hassen
- Laboratory of Molecular Immuno-Oncology, Faculty of Medicine of Monastir, University of Monastir, 5019, Monastir, Tunisia
| | - Noureddine Bouaouinaa
- Laboratory of Molecular Immuno-Oncology, Faculty of Medicine of Monastir, University of Monastir, 5019, Monastir, Tunisia.,Department of Cancerology and Radiotherapy, Farhat Hached University Hospital, Monastir, Tunisia
| | - Abdelfattah Zakhama
- Laboratory of Molecular Immuno-Oncology, Faculty of Medicine of Monastir, University of Monastir, 5019, Monastir, Tunisia.,Department of Anatomy and Pathologic Cytology, Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - Hedi Harizi
- Laboratory of Molecular Immuno-Oncology, Faculty of Medicine of Monastir, University of Monastir, 5019, Monastir, Tunisia. .,Faculty of Dental Medicine, University of Monastir, Monastir, Tunisia.
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Nunes RAB, Lima LB, Tanaka NI, da Costa Pereira A, Krieger JE, Mansur AJ. Genetic associations of bradykinin type 2 receptor, alpha-adrenoceptors and endothelial nitric oxide synthase with blood pressure and left ventricular mass in outpatients without overt heart disease. IJC HEART & VASCULATURE 2018; 21:45-49. [PMID: 30294660 PMCID: PMC6171079 DOI: 10.1016/j.ijcha.2018.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 08/20/2018] [Accepted: 09/11/2018] [Indexed: 11/28/2022]
Abstract
Background Physiological pathways such as bradykinin, renin-angiotensin, neurohormones and nitric oxide have been shown to play an important role in the regulation of cardiovascular function. Genetic variants of these pathways may impact blood pressure and left ventricular (LV) mass in different populations. To evaluate associations of genetic polymorphisms of bradykinin B2 receptor (BDKRB2), alpha-adrenergic receptors (ADRA) and endothelial nitric oxide synthase (eNOS) on the modulation of the blood pressure and the left ventricular mass. Methods We enrolled 758 individuals without overt heart disease. Blood pressure was estimated by auscultatory method during the clinical examination. Left ventricular (LV) mass was assessed by echocardiography. Genotypes for ADRA1A rs1048101, ADRA2A rs553668, ADRA2B rs28365031, eNOS rs2070744, eNOS rs1799983, and BDKRB2 rs5810761 polymorphisms were assessed by high-resolution melting analysis. Results BDKRB2 polymorphism rs5810761 was associated with blood pressure. Carriers of DD genotype had higher levels of SBP and DBP than carrier of II genotype (p = 0.013 and p = 0.007, respectively). eNOS polymorphism rs1799983 was associated with DBP. Carriers of GT genotype had lower levels of DBP than carriers of GG genotype (p = 0.018). eNOS polymorphism rs2070744 was associated with LV mass. Carriers of TC genotype had higher LV mass than carriers of TT genotype (p = 0.028). Conclusions In a cohort of individuals without overt heart disease, the BDKRB2 rs5810761 polymorphism (DD genotype carriers) were associated higher systolic and diastolic blood pressures, and the eNOS rs1799983 polymorphism (T allele carriers) were associated with lower diastolic blood pressure. The eNOS rs2070744 polymorphism (C allele carriers) was associated with higher left ventricular mass. These data suggest that eNOS and bradykinin receptor genetic variants may be potential markers of common cardiovascular phenotypes.
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Affiliation(s)
- Rafael Amorim Belo Nunes
- Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Brazil.,Applied Statistics Center (CEA) of Institute of Mathematics and Statistics (IME), Universidade de São Paulo, Brazil
| | - Larissa Barbosa Lima
- Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Brazil.,Applied Statistics Center (CEA) of Institute of Mathematics and Statistics (IME), Universidade de São Paulo, Brazil
| | - Nelson Ithiro Tanaka
- Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Brazil.,Applied Statistics Center (CEA) of Institute of Mathematics and Statistics (IME), Universidade de São Paulo, Brazil
| | - Alexandre da Costa Pereira
- Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Brazil.,Applied Statistics Center (CEA) of Institute of Mathematics and Statistics (IME), Universidade de São Paulo, Brazil
| | - José Eduardo Krieger
- Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Brazil.,Applied Statistics Center (CEA) of Institute of Mathematics and Statistics (IME), Universidade de São Paulo, Brazil
| | - Alfredo José Mansur
- Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Brazil.,Applied Statistics Center (CEA) of Institute of Mathematics and Statistics (IME), Universidade de São Paulo, Brazil
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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: 10] [Impact Index Per Article: 1.7] [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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Association of NOS3 gene polymorphisms with essential hypertension in Sudanese patients: a case control study. BMC MEDICAL GENETICS 2017; 18:128. [PMID: 29132319 PMCID: PMC5683550 DOI: 10.1186/s12881-017-0491-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 11/02/2017] [Indexed: 11/10/2022]
Abstract
BACKGROUND Essential hypertension (EH) is influenced by various environmental and genetic factors. Nitric oxide is important for the functional integrity of the vascular endothelium and is produced in endothelial cells by the enzyme endothelial nitric oxide synthase (eNOS). EH has a strong genetic component, and the NOS3 gene, which encodes eNOS, represents an interesting candidate for contribution to the phenotype. The most clinically relevant polymorphisms in the NOS3 gene are rs1799983 in exon 7 (encoding Glu298Asp), a variable number tandem repeat (VNTR) in intron 4, and rs2070744 (T-786C) in the promoter region. This study aims to investigate the association between these three polymorphisms in the NOS3 gene and EH in Sudanese patients. METHODS Hypertensive patients (n = 157) > 18 years of age with established hypertension from various hospitals in Khartoum, and controls (n = 85) > 18 years of age and with blood pressure measurements <140/90, were included in this case control study. Genotypes at the NOS3 variants were determined using TaqMan and polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) analyses. Genotype and allele frequencies were compared between the two groups by χ2 analysis, and differences were expressed as odds ratios with 95% confidence intervals (CIs). P values <0.05 were considered statistically significant. RESULTS The rs2070744 polymorphism in NOS3 was found to be associated with EH in the Sudanese population as the patients group had higher frequency of CC genotype compared with the controls (6.6% vs 6.1%, p = 0.02). Considering a dominant inheritance model, the frequency of TC + CC genotypes in patients was significantly higher than that in the control subjects (52.6% vs 34.1%, respectively; p < 0.01), with an odds ratio (95% CI) of 2.14 (1.23-3.74). In addition, the C allele was more frequent in the patients than the control group (29.6% vs 20%, p = 0.03, OR = 1.84 (1.15-2.93)). The c allele of intron 4 VNTR was reported in >1% of the Sudanese population under study. CONCLUSION The results of this study indicated that the rs2070744 polymorphism in NOS3 may be a genetic susceptibility factor for EH in the Sudanese population. The c allele of intron 4 VNTR is not rare in the Sudanese population.
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Terzi S, Emre A, Yesilcimen K, Yazıcı S, Erdem A, Sadik Ceylan U, Ciloglu F. The Endothelial Nitric Oxide Synthase (NOS3-786T>C) Genetic Polymorphism in Chronic Heart Failure: Effects of Mutant -786C allele on Long-term Mortality. ACTA CARDIOLOGICA SINICA 2017; 33:420-428. [PMID: 29033513 DOI: 10.6515/acs20161215b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND Nitric oxide plays an important role in the regulation of basal vascular tone and cardiac myocyte function. We investigated the NOS3-786T>C polymorphism in chronic heart failure (CHF) and its effects on long-term mortality. METHODS Ninety-one patients with CHF who were referred to the Department of Cardiology of Siyami Ersek Cardiovascular and Thoracic Surgery Center for cardiopulmonary exercise testing between April 2001 and January 2004 and 30 controls were enrolled in this study. Patient were followed prospectively for a period of 1 to 12 years. RESULTS Patients and controls were divided into three groups: TT, TC and CC, according to their NOS3-786T>C polymorphism. We noted that there was no significant difference in the genotype distribution between patients and controls. There was also no significant difference in endothelial nitric oxide synthase (eNOS) gene polymorphism between ischemic HF and nonischemic HF. During the follow-up period, 61 (67%) deaths occurred. The nonsurvivor group had lower left ventricular ejection fraction (LVEF) (p = 0.01), reduced peak oxygen consumption (p = 0.04) and were of older age (p = 0.001). Age, LVEF, peak oxygen consumption and genotype were found to be predictors of mortality (p < 0.05). Additionally, mortality was significantly increased in -786CC genotype patients compared to TT genotype patients (hazard ratio = 2.2; p = 0.03). By multivariate analysis, age and eNOS genotype were determined to be significant independent predictors of death. Additionally, Kaplan-Meier analysis confirmed that homozygote -786C genotype was associated with an increased risk of death (χ2 = 4.6, p = 0.03). CONCLUSIONS Our findings showed that the NOS3-786T>C polymorphism was associated with an increased risk of mortality in patients with CHF.
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Affiliation(s)
- Sait Terzi
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center
| | - Ayşe Emre
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center
| | - Kemal Yesilcimen
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center
| | - Selçuk Yazıcı
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center
| | - Aysun Erdem
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center
| | - Ufuk Sadik Ceylan
- Department of Cardiology, Siyami Ersek Cardiovascular and Thoracic Surgery Center
| | - Figen Ciloglu
- Genlab Medical Research and Diagnostic Laboratory, Istanbul, Turkey
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Shahid SU, Rehman A. Association Patterns of Endothelial Nitric Oxide Synthase Gene (NOS3) Variant Glu298Asp with Blood Pressure and Serum Lipid Levels in Subjects with Coronary Artery Disease from Pakistan. Ann Hum Genet 2017. [DOI: 10.1111/ahg.12192] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Saleem Ullah Shahid
- Department of Microbiology and Molecular Genetics; University of the Punjab; Lahore Pakistan
| | - Abdul Rehman
- Department of Microbiology and Molecular Genetics; University of the Punjab; Lahore Pakistan
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12
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Amorim Belo Nunes R, Pereira Barroso L, da Costa Pereira A, Pinto Brandão Rondon MU, Negrão CE, Krieger JE, Mansur AJ. Alpha2A-adrenergic receptor and eNOS genetic polymorphisms are associated with exercise muscle vasodilatation in apparently healthy individuals. IJC HEART & VASCULATURE 2016; 13:14-18. [PMID: 28616554 PMCID: PMC5454168 DOI: 10.1016/j.ijcha.2016.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 09/22/2016] [Accepted: 10/07/2016] [Indexed: 01/13/2023]
Abstract
PURPOSE Muscle vasodilatation during exercise has been associated with cardiovascular health and may be influenced by genetic variability. The purpose of this study was to evaluate functional genetic polymorphisms of physiologic pathways related to the regulation of the cardiovascular function (alpha-adrenergic receptors, endothelial nitric oxide synthase and bradykinin B2 receptor) and exercise muscle vasodilatation in apparently healthy men and women. METHODS We enrolled 689 individuals without established cardiovascular disease that had attended a check-up program. The vasodilatation was studied with venous occlusion plethysmography and determined by the increase of vascular conductance during handgrip exercise. Genotypes for ADRA1A Arg347Cys (rs1048101), ADRA2A 1780 C > T (rs553668), ADRA2B Del 301-303 (rs28365031), eNOS 786 T > C (rs2070744), eNOS Glu298Asp (rs1799983) and BDKRB2 (rs5810761) polymorphisms were assessed by polymerase chain reaction followed by high resolution melting analysis. RESULTS The eNOS rs2070744 polymorphism was significantly associated with forearm vascular conductance during exercise in women. Women with CC genotype showed higher vasodilatation than carriers of TC and TT genotypes (p = 0.043). The ADRA2A rs553668 polymorphism was significantly associated with forearm vascular conductance during exercise in men. Men with TT genotype had higher vasodilatation than carriers of CT and CC genotypes (p = 0.025). CONCLUSIONS eNOS rs207074 polymorphism in women and ADRA2A rs553668 polymorphism in men were associated with the increase of forearm vascular conductance during handgrip exercise. These findings suggest that eNOS and ADRA2A genetic polymorphisms may be potential markers of exercise muscle vasodilatation.
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Affiliation(s)
- Rafael Amorim Belo Nunes
- Unidade Clínica de Ambulatório Geral, Instituto do Coração (InCor) do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 44, São Paulo, Brazil
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Kim SK, Massett MP. Genetic Regulation of Endothelial Vasomotor Function. Front Physiol 2016; 7:571. [PMID: 27932996 PMCID: PMC5122706 DOI: 10.3389/fphys.2016.00571] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 11/09/2016] [Indexed: 12/01/2022] Open
Abstract
The endothelium plays an important role in the regulation of vasomotor tone and the maintenance of vascular integrity. Endothelial dysfunction, i.e., impaired endothelial dependent dilation, is a fundamental component of the pathogenesis of cardiovascular disease. Although endothelial dysfunction is associated with a number of cardiovascular disease risk factors, those risk factors are not the only determinants of endothelial dysfunction. Despite knowing many molecules involved in endothelial signaling pathways, the genetic contribution to endothelial function has yet to be fully elucidated. This mini-review summarizes current evidence supporting the genetic contribution to endothelial vasomotor function. Findings from population-based studies, association studies for candidate genes, and unbiased large genomic scale studies in humans and rodent models are discussed. A brief synopsis of the current studies addressing the genetic regulation of endothelial responses to exercise training is also included.
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Affiliation(s)
- Seung Kyum Kim
- Department of Health and Kinesiology, Texas A&M UniversityCollege Station, TX, USA
- Tufts Medical Center, Molecular Cardiology Research InstituteBoston, MA, USA
| | - Michael P. Massett
- Department of Health and Kinesiology, Texas A&M UniversityCollege Station, TX, USA
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İlhan N, Ateş K, İlhan N, Kaman D, Çeliker H. eNOS Glu298Asp Polymorphism and Endothelial Dysfunction in Patients with and without End-stage Renal Disease. Balkan Med J 2016; 33:128-37. [PMID: 27403380 DOI: 10.5152/balkanmedj.2016.16566] [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: 07/01/2014] [Accepted: 10/20/2015] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Chronic kidney diseases are known to influence nitric oxide metabolites (NOx) and asymmetric dimethylarginine (ADMA), though the exact mechanism is still poorly understood. AIMS The purpose of the present study was to examine eNOS Glu298Asp gene polymorphism, plasma NOx and ADMA concentration in subjects with and without End-stage Renal Disease. STUDY DESIGN Case-control study. METHODS In this study, genotype distributions of Glu-298Asp in exon 7 of the eNOS gene polymorphisms in 130 hemodialysis and 64 peritoneal dialysis patients were compared with 92 controls. NOx was measured by using the Griess reaction while arginine, ADMA and SDMA measurements were performed by HPLC. Genotyping for eNOS Glu298Asp polymorphism was detected with the polymerase chain reaction and/or polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique. RESULTS When the genotype frequencies of TT and GT genes were compared between both groups, there was no detected statistically important difference, even-though a TT genotype frequency was 27 (20.8%) versus 17 (26.6%), GT heterozygote genotype frequency was 52 (40%) versus 22 (34.4%), and GG homozygote genotype frequency was 51 (39.2%) versus 25 (39.1%), respectively (p>0.05). NOx, SDMA and ADMA concentrations were significantly elevated in subjects with hemodialysis patients as compared to their corresponding controls. Whereas nitrite was found to be significantly decreased in the patient with peritoneal dialysis. CONCLUSION Not observed any connection between the Glu298Asp polymorphism in the eNOS gene and end-stage Renal Diseases in our study population under different dialysis treatments. However, higher ADMA and SDMA concentrations in subjects with ESRD support the existing hypothesis that NOx overproduction affects endothelial dysfunction. Thus, the reduction of ADMA and SDMA concentrations might play a protective role in ESRD patients.
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Affiliation(s)
- Nevin İlhan
- Department of Medical Biochemistry, Fırat University School of Medicine, Elazığ, Turkey
| | - Kadir Ateş
- Department of Medical Biochemistry, Fırat University School of Medicine, Elazığ, Turkey
| | - Necip İlhan
- Department of Medical Biochemistry, Fırat University School of Medicine, Elazığ, Turkey
| | - Dilara Kaman
- Department of Medical Biochemistry, Fırat University School of Medicine, Elazığ, Turkey
| | - Hüseyin Çeliker
- Department of Nephrology, Fırat University Hospital, Elazığ, Turkey
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Glueck CJ, Haque M, Winarska M, Dharashivkar S, Fontaine RN, Zhu B, Wang P. Stromelysin-1 5A/6A and eNOS T-786C Polymorphisms, MTHFR C677T and A1298C Mutations, and Cigarette-Cannabis Smoking: A Pilot, Hypothesis-Generating Study of Gene-Environment Pathophysiological Associations With Buerger’s Disease. Clin Appl Thromb Hemost 2016; 12:427-39. [PMID: 17000887 DOI: 10.1177/1076029606293429] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Buerger’s disease (BD) etiologies are poorly understood. Beyond smoking cessation, medical-surgical treatments have limited success. We hypothesized that mutations associated with arterial vasospasm (stromelysin-1 5A/6A, eNOS T-786C) and C677T-A1298C methylene tetrahydrofolate reductase (MTHFR) interacted with cigarette-cannabis smoking, reducing vasodilatory nitric oxide (NO), promoting arterial spasm-thrombosis. Of 21 smoking BD patients (14 men [2 siblings], 7 women; 20 white, 1 African-American), compared to 21 age-gender-race matched healthy controls, 5A/6A stromelysin- 1 homozygosity was present in 7 of 21 (33%) BD cases versus 5 of 21 (24%) controls (risk ratio 1.4; 95% confidence interval [CI] 0.5-3.7), and eNOS T-786C homozygosity was present in 3 of 21 (14%) BD cases versus 1 of 21 (5%) controls (risk ratio 3.0; 95% CI 0.3-26.6). C677T MTHFR homozygosity or compound C677T-A1298C heterozygosity was present in 7 of 21 cases (33%) versus 11 of 21 controls (52%) (risk ratio 0.6; 95% CI 0.3-1.3). In 18 patients who stopped and 3 who continued smoking, all stromelysin-1 5A/6A and/or eNOS heterozygotes-homozygotes, superficial phlebitis, lower limb gangrenous ulcers, and intractable ischemic rest pain with arterial occlusion progressed despite conventional medical therapy, threatening amputation. In 15 patients, to increase vasodilatory NO via endothelial NO synthase, l-arginine (15 g/day) was given, along with folic acid (5 mg), vitamin B6 (100 mg), and B12 (2000 mg/day) to optimize homocysteine metabolism and reduce asymmetric dimethylarginine, a NO synthase inhibitor. Unexpectedly quickly and strikingly, within 8 weeks to 8 months receiving l-arginine-folic acid, 11 of 15 treated patients improved with uniform pain reduction, ulcer healing, and in 5, full recovery of previously absent peripheral pulses. In smokers homo/heterozygous for stromelysin-1 5A/6A and eNOS T-786C mutations, we speculate that the development and severity of BD are related to a gene-environment vasospastic interaction with reduced NO-mediated vasodilatation. Increasing NO production by l-arginine while optimizing homocysteine metabolism by folic acid-B6-B12 may have therapeutic benefit. Further blinded, placebo-controlled studies are needed to determine whether our observations can be generalized to larger BD cohorts.
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Affiliation(s)
- Charles J Glueck
- Cholesterol Center, Jewish Hospital, Cincinnati, Ohio 45229, USA.
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Rather RA, Dhawan V. Genetic markers: Potential candidates for cardiovascular disease. Int J Cardiol 2016; 220:914-23. [PMID: 27416153 DOI: 10.1016/j.ijcard.2016.06.251] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Revised: 06/22/2016] [Accepted: 06/26/2016] [Indexed: 02/07/2023]
Abstract
The effective prevention of cardiovascular disease depends upon the ability to recognize the high-risk individuals at an early stage of the disease or long before the development of adverse events. Evolving technologies in the fields of proteomics, metabolomics, and genomics have played a significant role in the discovery of cardiovascular biomarkers, but so far these methods have achieved the modest success. Hence, there is a crucial need for more reliable, suitable, and lasting diagnostic and therapeutic markers to screen the disease well in time to start the clinical aid to the patients. Gene polymorphisms associated with the cardiovascular disease play a decisive role in the disease onset. Therefore, the genetic marker evaluation to classify high-risk patients from low-risk patients trends an effective approach to patient management and care. Currently, there are no genetic markers available for extensive adoption as risk factors for coronary vascular disease, yet, there are numerous promising, biologically acceptable candidates. Many of these gene biomarkers, alone or in combination, can play an essential role in the prediction of cardiovascular risk. The present review highlights some putative emerging genetic biomarkers that could facilitate more authentic and fast diagnosis of CVD. This review also briefly describes few technological approaches employed in the biomarker search.
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Affiliation(s)
- Riyaz Ahmad Rather
- Department of Experimental Medicine and Biotechnology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Veena Dhawan
- Department of Experimental Medicine and Biotechnology, Postgraduate Institute of Medical Education and Research, Chandigarh, India.
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GLU298ASP and 4G/5G Polymorphisms and the Risk of Ischemic Stroke in Young Individuals. Can J Neurol Sci 2015; 42:310-6. [PMID: 26036781 DOI: 10.1017/cjn.2015.45] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Polymorphisms in the endothelial nitric oxide synthase (eNOS) and in the plasminogen activator inhibitor -1 (PAI-1) genes have been implicated in stroke pathogenesis but results are still controversial. The aim of this study was to examine the possible contribution of Glu298Asp in the eNOS and 4G/5G in the PAI-1polymorphisms with ischemic stroke in a young Mexican population. MATERIALS AND METHODS In a case-control study, conducted between January 2006 and June 2010, 204 patients ≤45 years of age with ischemic stroke and 204 controls matched by age and gender, were recruited. The Glu298Asp and 4G/5G polymorphisms were determined in all participants by polymerase chain reaction-restriction fragment length polymorphism. RESULTS There was a significant difference in the Glu298Asp genotype distribution (P=0.001) and allele frequency between the two groups (P=0.001). The 4G/5G genotype distribution (P=0.40) and the allele frequency was similar between groups; (P=0.13). There were independent factors for ischemic stroke: Asp carriage (GluAsp+AspAsp) (P=0.02); smoking (P=0.01); hypertension (P=0.03), and familial history of atherothrombotic disease (P=0.04). CONCLUSIONS The Asp allele from the Gu298Asp gene represents an independent risk factor for ischemic stroke in a young Mexican population. In contrast, the 4G/5G was not associated with an increased risk for this disease in the same group of patients, as previously has been demonstrated in other populations.
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Mackawy AMH, Khan AA, Badawy MES. Association of the endothelial nitric oxide synthase gene G894T polymorphism with the risk of diabetic nephropathy in Qassim region, Saudi Arabia-A pilot study. Meta Gene 2014; 2:392-402. [PMID: 25606424 PMCID: PMC4287856 DOI: 10.1016/j.mgene.2014.04.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 04/02/2014] [Accepted: 04/26/2014] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Diabetic nephropathy (DN) is a chronic microangiopathic complication of type 2 diabetes mellitus (DM).Vascular endothelial dysfunction resulting from impaired nitric oxide synthase (NOS) activity in the vascular endothelial cells has been suggested as playing an important role in the pathogenesis of diabetic nephropathy (DN). Endothelial nitric oxide synthase (E-NOS) gene G894T polymorphism has been reported to be associated with endothelial dysfunction leading to DN. Our objective was to evaluate the association of G894T polymorphism of eNOS gene with the risk of DN among type 2 diabetic Saudi patients. METHODS One hundred and twenty subjects were included in this study. They were divided into three groups. Group I, 40 controls. Group II, 40 type 2 diabetic patients without nephropathy. Group III, 40 type2 diabetic patients with nephropathy. Endothelial nitric oxide synthase (eNOS) G894Tpolymorphism was detected by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Plasma nitric oxide (NO) levels were estimated. RESULTS E-NOS genotype frequency showed non-significant differences among the all studied groups (p > 0.05). Both diabetic groups had significantly higher plasma nitrate levels than in controls with a significant increase in group III than in group II patients (all p < 0.0001). E NOS 894TT genotype was associated with higher plasma nitrate levels in all groups. CONCLUSION E-NOS gene SNP is not considered as genetic risk factor for DN among type 2 diabetic Saudi patients. The higher plasma levels of nitrates as a marker of oxidative stress in diabetic patients with nephropathy suggest the possible role of oxidative stress but not e-NOS gene SNP in pathogenesis of the DN.
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Affiliation(s)
- Amal Mohammed Husein Mackawy
- Medical Biochemistry and Molecular Biology, Faculty of MEdicine, Zagazig University and Medical Laboratory department, Applied Medical Science, Qassim University, Saudi Arabia
| | - Amjad Ali Khan
- Applied Medical Science College, Qassim University, Saudi Arabia
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da Silva RF, Sertório JTC, Lacchini R, Trapé AA, Tanus-Santos JE, Rush JWE, Amaral SL, Zago AS. Influence of training status and eNOS haplotypes on plasma nitrite concentrations in normotensive older adults: a hypothesis-generating study. Aging Clin Exp Res 2014; 26:591-8. [PMID: 24760600 DOI: 10.1007/s40520-014-0218-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 03/25/2014] [Indexed: 01/10/2023]
Abstract
The purpose of this study was to evaluate the relationship between 3 eNOS gene polymorphisms and training status (TS) in affecting plasma nitrite concentration (NO2) in normotensive adults over 50 years old. Resting blood pressure (BP) was measured in all participants (n = 101). Plasma was taken to analyze: lipid profile, nitrite concentration (NO2) and lipid peroxide levels (T-BARS). Also, genomic DNA was extracted from plasma for genotyping NOS3 polymorphisms (-786T>C; 894G>T; and VNTR in intron 4). TS was determined by one-mile walk test and Functional Fitness Test Battery from AAHPERD (TS1-regular TS; TS2-good TS; and TS3-very good TS). BP was not influenced by TS, but NO2 was 15% higher in TS3 (123 ± 27 nM) compared to TS-2 (106 ± 22 nM). No differences were found in plasma NO2 in the haplotype analyses. However, the presence of the C allele (T-786C) and ASP allele (Glu298Asp) was found to enhance the correlation between TS and NO2 levels (r = 0.492 in C/4b/ASP haplotype and r = 0.855 in C/4a/ASP haplotype). This study thus identifies NOS3 polymorphism-dependent sensitivity to the effects of physical training on plasma NO2. Maintenance of good levels of training status, in carriers of C allele for T-786C polymorphism, combined with ASP allele for Glu298Asp polymorphism, may result in an increase in the NO2 plasma concentrations, which may reflect improved NO bioavailability in older adult normotensive individuals.
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20
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Silva BM, Barbosa TC, Neves FJ, Sales AK, Rocha NG, Medeiros RF, Pereira FS, Garcia VP, Cardoso FT, Nobrega ACL. eNOS gene haplotype is indirectly associated with the recovery of cardiovascular autonomic modulation from exercise. Auton Neurosci 2014; 186:77-84. [PMID: 25242530 DOI: 10.1016/j.autneu.2014.09.001] [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: 10/12/2013] [Revised: 08/28/2014] [Accepted: 09/02/2014] [Indexed: 11/17/2022]
Abstract
Polymorphisms in the endothelial nitric oxide synthase (eNOS) gene decrease expression and activation of eNOS in vitro, which is associated with lower post-exercise increase in vasodilator reactivity in vivo. However, it is unknown whether such polymorphisms are associated with other eNOS-related phenotypes during recovery from exercise. Therefore, we investigated the impact of an eNOS haplotype containing polymorphic alleles at loci -786 and 894 on the recovery of cardiovascular autonomic function from exercise. Sedentary, non-obese, healthy subjects were enrolled [n = 107, age 32 ± 1 years (mean ± SEM)]. Resting autonomic modulation (heart rate variability, systolic blood pressure variability, and spontaneous baroreflex sensitivity) and vascular reactivity (forearm hyperemic response post-ischemia) were assessed at baseline, 10, 60, and 120 min after a maximal cardiopulmonary exercise test. Besides, autonomic function was assessed by heart rate recovery (HRR) immediately after peak exercise. Haplotype analysis showed that vagal modulation (i.e., HF n.u.) was significantly higher, combined sympathetic and vagal modulation (i.e., LF/HF) was significantly lower and total blood pressure variability was significantly lower post-exercise in a haplotype containing polymorphic alleles (H2) compared to a haplotype with wild type alleles (H1). HRR was similar between groups. Corroborating previous evidence, H2 had significantly lower post-exercise increase in vasodilator reactivity than H1. In conclusion, a haplotype containing polymorphic alleles at loci -786 and 894 had enhanced recovery of autonomic modulation from exercise, along with unchanged HRR, and attenuated vasodilator reactivity. Then, these results suggest an autonomic compensatory response of a direct deleterious effect of eNOS polymorphisms on the vascular function.
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Affiliation(s)
- Bruno M Silva
- Laboratory of Exercise Sciences, Department of Physiology and Pharmacology, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil; Department of Physiology, Section of Exercise Physiology, Federal University of São Paulo, São Paulo, Brazil.
| | - Thales C Barbosa
- Laboratory of Exercise Sciences, Department of Physiology and Pharmacology, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Fabricia J Neves
- Laboratory of Exercise Sciences, Department of Physiology and Pharmacology, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Allan K Sales
- Laboratory of Exercise Sciences, Department of Physiology and Pharmacology, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Natalia G Rocha
- Laboratory of Exercise Sciences, Department of Physiology and Pharmacology, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Renata F Medeiros
- Laboratory of Exercise Sciences, Department of Physiology and Pharmacology, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Felipe S Pereira
- Laboratory of Exercise Sciences, Department of Physiology and Pharmacology, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Vinicius P Garcia
- Laboratory of Exercise Sciences, Department of Physiology and Pharmacology, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Fabiane T Cardoso
- Laboratory of Exercise Sciences, Department of Physiology and Pharmacology, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Antonio C L Nobrega
- Laboratory of Exercise Sciences, Department of Physiology and Pharmacology, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
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Evaluation of endothelial function by peripheral arterial tonometry and relation with the nitric oxide pathway. Nitric Oxide 2014; 42:1-8. [PMID: 25064180 DOI: 10.1016/j.niox.2014.07.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 04/30/2014] [Accepted: 07/10/2014] [Indexed: 10/25/2022]
Abstract
Endothelial dysfunction is an important component in the development of cardiovascular diseases. Endothelial function may be evaluated by peripheral arterial tonometry (PAT) which measures the vasodilator function in the microvasculature of the fingertip during reactive hyperaemia. The reactive hyperaemia index (RHI) is decreased in the presence of cardiovascular risk factors and thus far several studies have shown that PAT-RHI may provide reliable prediction of outcome. The technique is operator independent and easy to perform. Abnormalities measured by PAT follow the same trend as those measured by flow-mediated dilation in the brachial artery, but the two methods are not interchangeable. We have reviewed the recent literature in an effort to evaluate peripheral arterial tonometry as a method to assess the function of the endothelium and additionally suggest directions for future research. Special attention will be directed to the nitric oxide dependency of the reactive hyperaemia index obtained by peripheral arterial tonometry.
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Dell'Omo G, Penno G, Pucci L, Lucchesi D, Del Prato S, Pedrinelli R. Q192R Paraoxonase (PON)1 Polymorphism, Insulin Sensitivity, and Endothelial Function in Essential Hypertensive Men. CLINICAL MEDICINE INSIGHTS-CARDIOLOGY 2014; 8:57-62. [PMID: 25089090 PMCID: PMC4116359 DOI: 10.4137/cmc.s15493] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 04/30/2014] [Accepted: 05/01/2014] [Indexed: 12/04/2022]
Abstract
AIMS Essential hypertension is characterized by increased reactive oxygen species (ROS) generation harmful for insulin sensitivity and nitric oxide (NO)-mediated vasomotor function, a noxious effect that paraoxonase (PON)1, an antioxidant circulating high-density lipoprotein (HDL)-bound esterase, may counteract. The PON1 gene contains several polymorphisms including a glutamine (Q) to arginine (R) transition at position 192 encoding circulating allozymes with higher antioxidant activity that might influence both parameters. METHODS Q192R was determined by polymerase chain reaction in 72 never-treated, glucose-tolerant, uncomplicated essential hypertensive men. Insulin sensitivity was assessed by homeostasis model assessment (HOMA) and endothelial function by forearm vasodilation (strain-gage venous plethysmography) to intra-arterial acetylcholine (ACH) with sodium nitroprusside (NIP) as a NO-independent control. Additional evaluation variables included 24-hour blood pressure (BP), lipids, BMI, smoking status, and metabolic syndrome (MetS) by Adult Treatment Panel (ATP)-III criteria. R192 was considered as the rare allele, and its associations analyzed by dominant models (Q/Q vs. Q/R + R/R). RESULTS Genotype frequencies were consistent with the Hardy–Weinberg equilibrium. HOMA was lower and insulin resistance (the upper fourth of HOMA values distribution) less prevalent in Q/R + R/R carriers in whom ACH-mediated vasodilatation was greater and endothelial dysfunction (the bottom fourth of ACHAUC values distribution) less frequent than in Q/Q homozygotes. Q192R polymorphism and MetS were unrelated parameters despite their common association with insulin resistance. 24-hour BP, BMI, lipids, and smoking habits were homogeneously distributed across genotypes. CONCLUSIONS Q192R polymorphism associates differentially with insulin sensitivity and endothelial function in essential hypertensive men.
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Affiliation(s)
- Giulia Dell'Omo
- Dipartimenti di Patologia Chirurgica, Medica, Molecolare e dell'Area Critica, Università di Pisa, Pisa, Italy
| | - Giuseppe Penno
- Medicina Clinica e Sperimentale, Università di Pisa, Pisa, Italy
| | - Laura Pucci
- Istituto di Biologia e Biotecnologia Agraria, CNR, Pisa, Italy
| | - Daniela Lucchesi
- Medicina Clinica e Sperimentale, Università di Pisa, Pisa, Italy
| | | | - Roberto Pedrinelli
- Dipartimenti di Patologia Chirurgica, Medica, Molecolare e dell'Area Critica, Università di Pisa, Pisa, Italy
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Sciacqua A, Presta I, Perticone M, Tassone EJ, Andreozzi F, Quitadamo MC, Sangiuolo FC, Sesti G, Perticone F. 3'-UTR OLR1/LOX-1 gene polymorphism and endothelial dysfunction: molecular and vascular data in never-treated hypertensive patients. Intern Emerg Med 2014; 9:273-81. [PMID: 23054405 DOI: 10.1007/s11739-012-0857-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 09/15/2012] [Indexed: 10/27/2022]
Abstract
Endothelial dysfunction represents an independent predictor for clinical events. Genetic background may promote deleterious alterations of endothelial physiology. The aim of the study was to investigate the relationship between the rs1050283 polymorphism in the 3'-UTR of OLR1/LOX-1 gene and endothelial dysfunction in 178 never-treated hypertensive patients and 36 healthy subjects. The rs1050283 C/T single nucleotide polymorphism was detected, by TaqMan allelic discrimination assay. The influence of polymorphism on gene transcription rate was tested in 12 heterozygous hypertensive patients, by using an allelic imbalance assay. Forearm blood flow (FBF) was measured during intra-arterial infusion of acetylcholine (ACh), and sodium nitroprusside at increasing doses. Analysis of endothelium-dependent and endothelium-independent vasodilatation was tested according to rs1050283 polymorphism. In hypertensive patients, ACh-stimulated FBF is significantly reduced in T allele carriers (P < 0.0001), even when the allelic imbalance assay indicates an overexpression of C allele. In healthy subjects, there is no significant difference for ACh-dependent vasodilatation among genotypic groups (P = 0.660). In essential hypertensive patients, the T allele of OLR1/LOX-1 gene is strongly associated with an impaired endothelium-dependent vasodilatation, a powerful predictor of cardiovascular events.
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Affiliation(s)
- Angela Sciacqua
- Department of Medical and Surgical Sciences, University Magna Græcia of Catanzaro, V.le Europa, 88100, Catanzaro, Italy
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Hermida N, Balligand JL. Low-density lipoprotein-cholesterol-induced endothelial dysfunction and oxidative stress: the role of statins. Antioxid Redox Signal 2014; 20:1216-37. [PMID: 23924077 DOI: 10.1089/ars.2013.5537] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
SIGNIFICANCE Cardiovascular diseases (CVD) represent a major public health burden. High low-density lipoprotein (LDL)-cholesterol is a recognized pathogenic factor for atherosclerosis, and its complications and statins represent the most potent and widely used therapeutic approach to prevent and control these disorders. RECENT ADVANCES A number of clinical and experimental studies concur to identify endothelial dysfunction as a primary step in the development of atherosclerosis, as well as a risk factor for subsequent clinical events. Oxidant stress resulting from chronic elevation of plasma LDL-cholesterol (LDL-chol) is a major contributor to both endothelial dysfunction and its complications, for example, through alterations of endothelial nitric oxide signaling. CRITICAL ISSUES Statin treatment reduces morbidity and mortality of CVD, but increasing evidence questions that this is exclusively through reduction of plasma LDL-chol. The identification of ancillary effects on (cardio)vascular biology, for example, through their modulation of oxidative stress, will not only increase our understanding of their mechanisms of action, with a potential broadening of their indication(s), but also lead to the identification of new molecular targets for future therapeutic developments in CVD. FUTURE DIRECTIONS Further characterization of molecular pathways targeted by statins, for example, not directly mediated by changes in plasma lipid concentrations, should enable a more comprehensive approach to the pathogenesis of (cardio)vascular disease, including, for example, epigenetic regulation and fine tuning of cell metabolism.
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Affiliation(s)
- Nerea Hermida
- 1 Pole of Pharmacology and Therapeutics (FATH), Institut de Recherche Experimentale et Clinique (IREC), Université catholique de Louvain , Brussels, Belgium
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Silva BM, Neves FJ, Rocha NG, Sales ARK, Medeiros RF, Barbosa TC, Pereira FS, Cardoso FT, Nóbrega ACLD. Endothelial nitric oxide gene haplotype reduces the effect of a single bout of exercise on the vascular reactivity in healthy subjects. Transl Res 2013; 161:15-25. [PMID: 22691914 DOI: 10.1016/j.trsl.2012.05.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Revised: 05/03/2012] [Accepted: 05/10/2012] [Indexed: 11/24/2022]
Abstract
Polymorphisms in the endothelial nitric oxide synthase (eNOS) gene reduce shear stress-induced nitric oxide production. Thus, we investigated the individual and combined impact of 3 variants in the eNOS gene (-786T>C, intron 4b4a, and 894G>T) on vascular reactivity before and after exercise. Sedentary, healthy subjects were studied (105 women/26 men, age 32 ± 1 years [mean ± standard error of the mean]). Genotypes were determined by polymerase chain reaction restriction fragment length polymorphism, and haplotypes were determined by a Bayesian-based algorithm. Vascular reactivity was evaluated by the percentage of change in forearm vascular conductance provoked by 5 minutes of circulatory occlusion before (baseline) and 10, 60, and 120 minutes after a maximal cardiopulmonary exercise test. Vascular reactivity increased 10 minutes after exercise in the entire sample (baseline: 218 ± 11% vs 10 minutes: 284 ± 15%, P < 0.001), remained increased at 60 minutes (239 ± 12%, P = 0.02 vs baseline), and returned to baseline at 120 minutes (210 ± 10%, P = 0.83 vs baseline). Genotype analysis showed that subjects with the 894G>T polymorphism had lower vascular reactivity than wild counterparts (group effect, P = 0.05). Furthermore, subjects with haplotype 2 (H2), containing the -786T>C and 894G>T polymorphisms, had lower vascular reactivity than wild counterparts (haplotype 1 [H1]) (group effect, P = 0.05), whereas subjects with haplotype 4 (H4), containing only the 894G>T polymorphism, had vascular reactivity similar to that of wild counterparts (H1) (group effect, P = 0.35). Altogether, these results indicate that the 894G>T polymorphism reduced exercise-mediated increase in vascular reactivity, particularly when it occurred concomitantly with the -786T>C polymorphism.
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Affiliation(s)
- Bruno M Silva
- Laboratory of Exercise Sciences, Department of Physiology and Pharmacology, Fluminense Federal University, Niterói, Rio de Janeiro State, Brazil
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Abdel-Aziz TA, Mohamed RH. Association of endothelial nitric oxide synthase gene polymorphisms with classical risk factors in development of premature coronary artery disease. Mol Biol Rep 2012; 40:3065-71. [PMID: 23269619 DOI: 10.1007/s11033-012-2380-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Accepted: 12/17/2012] [Indexed: 12/29/2022]
Abstract
Genetic polymorphism of the endothelial nitric oxide synthase (eNOS) affects the pathogenesis of atherosclerosis and associated with premature coronary artery disease (PCAD). We aimed to explore the association between Glu298Asp polymorphism of the eNOS gene and premature CAD in Egyptians, and the possible interaction between this polymorphism and other risk factors. The study population consisted of 116 patients with PCAD, and 119 controls. Glu298Asp polymorphism (rs1799983) of the eNOS gene was analyzed by polymerase chain reaction (PCR). We found that the TT genotype of the eNOS gene increased the risk of PCAD by 2.6. Hypertension, diabetes, smoking, total cholesterol, triglycerides, LDLc, HDLc and TT genotype of the eNOS gene were independent risk factors for the development of PCAD. We conclude that, the TT genotype of Glu298Asp polymorphism of eNOS gene is an independent risk factor of PCAD in Egyptians. The association of smoking, obesity, dyslipidemia and/or metabolic syndrome with the TT genotype increased the risk of the development of PCAD.
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Affiliation(s)
- T A Abdel-Aziz
- Cardiology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
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Thompson AK, Newens KJ, Jackson KG, Wright J, Williams CM. Glu298Asp polymorphism influences the beneficial effects of fish oil fatty acids on postprandial vascular function. J Lipid Res 2012; 53:2205-2213. [PMID: 22847178 DOI: 10.1194/jlr.p025080] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Our objective was to determine whether the endothelial nitric oxide synthase (eNOS) Glu298Asp polymorphism influences vascular response to raised NEFA enriched with saturated fatty acids (SFA) or long-chain (LC) n-3 polyunsaturated fatty acids (PUFA). Subjects were prospectively recruited for genotype (Glu298, n = 30 and Asp298, n = 29; balanced for age and gender) consumed SFA on two occasions, with and without the substitution of 0.07 g fat/kg body weight with LC n-3 PUFA, and with heparin infusion to elevate NEFA. Endothelial function was measured before and after NEFA elevation (240 min), with blood samples taken every 30 min. Flow-mediated dilation (FMD) decreased following SFA alone and increased following SFA+LC n-3 PUFA. There were 2-fold differences in the change in FMD response to the different fat loads between the Asp298 and Glu298 genotypes (P = 0.002) and between genders (P < 0.02). Sodium nitroprusside-induced reactivity, measured by laser Doppler imaging with iontophoresis, was significantly greater with SFA+LC n-3 PUFA in all female subjects (P < 0.001) but not in males. Elevated NEFA influences both endothelial-dependent and endothelial-independent vasodilation during the postprandial phase. Effects of fat composition appear to be genotype and gender dependent, with the greatest difference in vasodilatory response to the two fat loads seen in the Asp298 females.
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Affiliation(s)
- Abby K Thompson
- Hugh Sinclair Unit of Human Nutrition, Department of Food and Nutritional Sciences, University of Reading, Reading, RG6 6AP, UK
| | - Katie J Newens
- Hugh Sinclair Unit of Human Nutrition, Department of Food and Nutritional Sciences, University of Reading, Reading, RG6 6AP, UK
| | - Kim G Jackson
- Hugh Sinclair Unit of Human Nutrition, Department of Food and Nutritional Sciences, University of Reading, Reading, RG6 6AP, UK
| | - John Wright
- Hugh Sinclair Unit of Human Nutrition, Department of Food and Nutritional Sciences, University of Reading, Reading, RG6 6AP, UK
| | - Christine M Williams
- Hugh Sinclair Unit of Human Nutrition, Department of Food and Nutritional Sciences, University of Reading, Reading, RG6 6AP, UK.
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Kolovou G, Giannakopoulou V. Endothelial nitric oxide synthase gene variants and coronary heart disease. Angiology 2012; 63:84-5. [PMID: 22253287 DOI: 10.1177/0003319711410967] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
As atherosclerosis is still one of the major causes of death in Western populations, it is important to identify those individuals who are at increased risk for the disease so that aggressive treatment may be administered as early as possible. Following the understanding that oxidative stress has a pivotal role in the development and progression of atherosclerosis, many polymorphisms in genes that are related to redox systems were examined for their association with increased risk for cardiovascular disease (CVD). Although many polymorphisms were studied, only a handful showed consistent relevance to CVD in different trials. This article focuses on six of these polymorphisms, examining their effect on the risk for CVD as well as their effect on protein expression and function. Reports regarding pharmacogenetic implications of these polymorphisms, where such exist, are discussed as well.
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Niu W, Qi Y. An updated meta-analysis of endothelial nitric oxide synthase gene: three well-characterized polymorphisms with hypertension. PLoS One 2011; 6:e24266. [PMID: 21912683 PMCID: PMC3166328 DOI: 10.1371/journal.pone.0024266] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Accepted: 08/08/2011] [Indexed: 11/30/2022] Open
Abstract
Background Numerous individually underpowered association studies have been conducted on endothelial nitric oxide synthase (eNOS) genetic variants across different ethnic populations, however, the results are often irreproducible. We therefore aimed to meta-analyze three eNOS widely-evaluated polymorphisms, G894T (rs1799983) in exon 7, 4b/a in intron 4, and T−786C (rs2070744) in promoter region, in association with hypertension from both English and Chinese publications, while addressing between-study heterogeneity and publication bias. Methods Data were analyzed using Stata software (version 11.0), and random-effects model was applied irrespective of between-study heterogeneity, which was evaluated by subgroup and meta-regression analyses. Publication bias was weighed using the Egger's test and funnel plot. Results There were total 19284/26003 cases/controls for G894T, and 6890/6858 for 4b/a, and 5346/6392 for T−786C polymorphism. Overall comparison of allele 894T with 894G in all study populations yielded a 16% increased risk for hypertension (odds ratio [OR] = 1.16; 95% confidence interval [95% CI]: 1.07–1.27; P = 0.001), and particularly a 32% increased risk (95% CI: 1.16–1.52; P<0.0005) in Asians and a 40% increased risk (95% CI: 1.19–1.65; P<0.0005) in Chinese. Further subgroup analyses suggested that published languages accounted for the heterogeneity for G894T polymorphism. The overall OR of allele 4a versus 4b was 1.29 (95% CI: 1.13–1.46; P<0.0005) in all study populations, and this estimate was potentiated in Asians (OR = 1.42; 95% CI: 1.16–1.72; P<0.0005). For T−786C, ethnicity-stratified analyses suggested a significantly increased risk for −786C allele (OR = 1.25; 95% CI: 1.06–1.47; P = 0.007) and −786CC genotype (OR = 1.69; 95% CI: 1.20–2.38; P = 0.003) in Whites. As an aside, the aforementioned risk estimates reached significance after Bonferroni correction. Finally, meta-regression analysis on other study-level covariates failed to provide any significance for all polymorphisms. Conclusion We, via a comprehensive meta-analysis, ascertained the role of eNOS G894T and 4b/a polymorphisms on hypertension in Asians, and T−786C polymorphism in Whites.
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Affiliation(s)
- Wenquan Niu
- State Key Laboratory of Medical Genomics at Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Laboratory of Vascular Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
- Shanghai Key Laboratory of Vascular Biology, Shanghai Institute of Hypertension, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- * E-mail: (WN); (YQ)
| | - Yue Qi
- Department of Epidemiology, Beijing An Zhen Hospital, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Capital Medical University, Beijing, China
- * E-mail: (WN); (YQ)
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Robertson CS, Gopinath SP, Valadka AB, Van M, Swank PR, Goodman JC. Variants of the endothelial nitric oxide gene and cerebral blood flow after severe traumatic brain injury. J Neurotrauma 2011; 28:727-37. [PMID: 21332418 DOI: 10.1089/neu.2010.1476] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Experimental studies suggest that nitric oxide produced by endothelial nitric oxide synthase (NOS3) plays a role in maintaining cerebral blood flow (CBF) after traumatic brain injury (TBI). The purpose of this study was to determine if common variants of the NOS3 gene contribute to hypoperfusion after severe TBI. Fifty-one patients with severe TBI were studied. Cerebral hemodynamics, including global CBF by the stable xenon computed tomography (CT) technique, internal carotid artery flow volume (ICA-FVol), and flow velocity in intracranial vessels, were measured within 12 h of injury, and at 48 h after injury. A blood sample was collected for DNA analysis, and genotyping of the following variants of the NOS3 gene was performed: -786T>C, 894G>T, and 27bp VNTR. Cerebral hemodynamics were most closely related to the-786T>C genotype. CBF averaged 57.7±3.0 mL/100 g/min with the normal T/T genotype, 47.0±2.5 mL/100 g/min with the T/C, and 37.3±8.8 mL/100 g/min with the C/C genotype (p=0.0146). Cerebrovascular resistance followed an inverse pattern with the highest values occurring with the C/C genotype (p=0.0027). The lowest ICA-FVol of 124±43 mL/min was found at 12 h post-injury in the more injured hemisphere of the patients with the C/C genotype (p=0.0085). The mortality rate was 20% in patients with the T/T genotype and 17% with the T/C genotype. In contrast, both of the patients with the C/C genotype were dead at 6 months post-injury (p=0.022). The findings in this study support the importance of NO produced by NOS3 activity in maintaining CBF after TBI, since lower CBF values were found in patients having the -786C allele. The study suggests that a patient's individual genetic makeup may contribute to the brain's response to injury and determine the patient's chances of surviving the injury. The results here will need to be studied in a larger number of patients, but could explain some of the variability in outcome that occurs following severe TBI.
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Affiliation(s)
- Claudia S Robertson
- Department of Neurosurgery, Baylor College of Medicine, Houston, Texas 77030, USA.
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Effect of the 894G>T polymorphism of the endothelial nitric oxide synthase on vascular reactivity following maximal dynamic exercise. J Hypertens 2010; 28:764-70. [PMID: 19952778 DOI: 10.1097/hjh.0b013e328334f55c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Considering that the role of nitric oxide as a vasodilator is increased after an acute bout of exercise and that the 894G>T polymorphism of the endothelial nitric oxide synthase seems to reduce the nitric oxide release in response to shear stress, the present study investigated the 894G>T polymorphism in relation to vascular reactivity following maximal dynamic exercise. METHOD We studied 110 healthy volunteers (wild-type group 45.5% and polymorphic group 54.5%). The protocol included vascular reactivity assessment at baseline and during reactive hyperemia, before, 10, 60 and 120 min after a maximal cardiopulmonary exercise test. Genomic DNA was extracted from blood samples to determine the 894G>T polymorphism. RESULTS There were no differences between the wild-type and polymorphic groups concerning anthropometric, metabolic and hemodynamic characteristics. Blood flow, before maximal exercise, was similar between the wild-type and the polymorphic groups. The polymorphic group presented lower vascular reactivity regardless of time (P = 0.019 for group main effect), and posthoc analysis revealed that polymorphic patients had lower values than wild-type only at the 120 min measurement (P = 0.002). Concerning within-group analysis, vascular reactivity increased at 10 min after exercise (P = 0.029) returning to baseline at 120 min (P = 0.005) in the polymorphic group. CONCLUSION Patients with the 894G>T polymorphism had lower vascular reactivity after a single bout of exercise.
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Negrao MV, Alves CR, Alves GB, Pereira AC, Dias RG, Laterza MC, Mota GF, Oliveira EM, Bassaneze V, Krieger JE, Negrao CE, Rondon MUPB. Exercise training improves muscle vasodilatation in individuals with T786C polymorphism of endothelial nitric oxide synthase gene. Physiol Genomics 2010; 42A:71-7. [DOI: 10.1152/physiolgenomics.00145.2009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Allele T at promoter region of the eNOS gene has been associated with an increase in coronary disease mortality, suggesting that this allele increases susceptibility for endothelial dysfunction. In contrast, exercise training improves endothelial function. Thus, we hypothesized that: 1) Muscle vasodilatation during exercise is attenuated in individuals homozygous for allele T, and 2) Exercise training improves muscle vasodilatation in response to exercise for TT genotype individuals. From 133 preselected healthy individuals genotyped for the T786C polymorphism, 72 participated in the study: TT ( n = 37; age 27 ± 1 yr) and CT+CC ( n = 35; age 26 ± 1 yr). Forearm blood flow (venous occlusion plethysmography) and blood pressure (oscillometric automatic cuff) were evaluated at rest and during 30% handgrip exercise. Exercise training consisted of three sessions per week for 18 wk, with intensity between anaerobic threshold and respiratory compensation point. Resting forearm vascular conductance (FVC, P = 0.17) and mean blood pressure ( P = 0.70) were similar between groups. However, FVC responses during handgrip exercise were significantly lower in TT individuals compared with CT+CC individuals (0.39 ± 0.12 vs. 1.08 ± 0.27 units, P = 0.01). Exercise training significantly increased peak VO2 in both groups, but resting FVC remained unchanged. This intervention significantly increased FVC response to handgrip exercise in TT individuals ( P = 0.03), but not in CT+CC individuals ( P = 0.49), leading to an equivalent FVC response between TT and CT+CC individuals (1.05 ± 0.18 vs. 1.59 ± 0.27 units, P = 0.27). In conclusion, exercise training improves muscle vasodilatation in response to exercise in TT genotype individuals, demonstrating that genetic variants influence the effects of interventions such as exercise training.
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Affiliation(s)
- Marcelo V. Negrao
- Heart Institute (InCor), University of São Paulo Medical School; and
| | - Cleber R. Alves
- Heart Institute (InCor), University of São Paulo Medical School; and
| | | | | | - Rodrigo G. Dias
- Heart Institute (InCor), University of São Paulo Medical School; and
| | - Mateus C. Laterza
- Heart Institute (InCor), University of São Paulo Medical School; and
| | - Gloria F. Mota
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | - Edilamar M. Oliveira
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
| | | | - Jose E. Krieger
- Heart Institute (InCor), University of São Paulo Medical School; and
| | - Carlos E. Negrao
- Heart Institute (InCor), University of São Paulo Medical School; and
- School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil
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Abstract
Prospective identification of which individuals with diabetes mellitus (DM) are at greatest risk for developing cardiovascular disease (CVD) complications would have considerable public health importance by allowing the allocation of limited resources to be focused on those individuals who would most benefit from aggressive intervention. Over the past 20 years genetic disease association studies have demonstrated that polymorphisms at specific genetic loci may identify those individuals at greatest risk for developing CVD in the setting of DM. This article reviews the evidence accumulated to date on four polymorphic loci with the aim of explaining how these polymorphisms modify the risk for CVD in DM by modifying the functional activity of a specific gene. Use of the knowledge of these genetic differences among individuals in targeting drug therapy (pharmacogenomics) is also discussed.
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Affiliation(s)
- Dan Farbstein
- Technion-Israel Institute of Technology, Haifa, Israel.
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Zago AS, Park JY, Fenty-Stewart N, Silveira LR, Kokubun E, Brown MD. Effects of aerobic exercise on the blood pressure, oxidative stress and eNOS gene polymorphism in pre-hypertensive older people. Eur J Appl Physiol 2010; 110:825-32. [PMID: 20614130 DOI: 10.1007/s00421-010-1568-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/28/2010] [Indexed: 10/19/2022]
Abstract
The polymorphisms of endothelial nitric oxide synthase (eNOS) are associated with reduced eNOS activity. Aerobic exercise training (AEX) may influence resting nitric oxide (NO) production, oxidative stress and blood pressure. The purpose of this study was to investigate the effect of AEX on the relationship among blood pressure, eNOS gene polymorphism and oxidative stress in pre-hypertensive older people. 118 pre-hypertensive subjects (59 ± 6 years) had blood samples collected after a 12 h overnight fast for assessing plasma NO metabolites (NOx) assays, thiobarbituric acid reactive substances (T-BARS) and superoxide dismutase activity (ecSOD). eNOS polymorphism (T-786C and G-894T) was done by standard PCR methods. All people were divided according to the genotype results (G1: TT/GG, G2: TT/GT + TT, G3: TC + CC/GG, G4: TC + CC/GT + TT). All parameters were measured before and after 6 months of AEX (70% of VO(2 max)). At baseline, no difference was found in systolic and diastolic blood pressure, ecSOD and T-BARS activity. Plasma NOx levels were significantly different between G1 (19 ± 1 μM) and G4 (14.2 ± 0.6 μM) and between G2 (20.1 ± 1.7 μM) and G4 (14.2 ± 0.6 μM). Therefore, reduced NOx concentration in G4 group occurred only when the polymorphisms were associated, suggesting that these results are more related to genetic factors than NO-scavenging effect. After AEX, the G4 increased NOx values (17.2 ± 1.2 μM) and decreased blood pressure. G1, G3 and G4 decreased T-BARS levels. These results suggest the AEX can modulate the NOx concentration, eNOS activity and the relationship among eNOS gene polymorphism, oxidative stress and blood pressure especially in C (T-786C) and T (G-894T) allele carriers.
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Affiliation(s)
- Anderson Saranz Zago
- School of Physical Education and Sport of Ribeirão Preto, University of São Paulo, Av. Bandeirantes, 3900-Monte Alegre, Ribeirão Preto, São Paulo, 14040-900, Brazil.
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Human endothelial dysfunction: EDRFs. Pflugers Arch 2010; 459:1005-13. [DOI: 10.1007/s00424-010-0822-4] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Revised: 03/03/2010] [Accepted: 03/04/2010] [Indexed: 02/02/2023]
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Sinici İ, Güven EO, Şerefoğlu E, Hayran M. T-786C Polymorphism in Promoter of eNOS Gene as Genetic Risk Factor in Patients With Erectile Dysfunction in Turkish Population. Urology 2010; 75:955-60. [DOI: 10.1016/j.urology.2009.06.063] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2009] [Revised: 06/11/2009] [Accepted: 06/26/2009] [Indexed: 01/23/2023]
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Isordia-Salas I, Leaños-Miranda A, Borrayo-Sánchez G. The Glu298ASP polymorphism of the endothelial nitric oxide synthase gene is associated with premature ST elevation myocardial infarction in Mexican population. Clin Chim Acta 2010; 411:553-7. [DOI: 10.1016/j.cca.2010.01.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2009] [Revised: 01/08/2010] [Accepted: 01/08/2010] [Indexed: 11/28/2022]
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Nitric oxide dysfunction in vascular endothelium and platelets: role in essential hypertension. J Hypertens 2009; 27:2310-20. [DOI: 10.1097/hjh.0b013e328330e89a] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Alzheimer's disease and endothelial dysfunction. Neurol Sci 2009; 31:1-8. [PMID: 19838624 DOI: 10.1007/s10072-009-0151-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2009] [Accepted: 09/10/2009] [Indexed: 10/20/2022]
Abstract
Recent studies suggest strong interactions between cerebrovascular and Alzheimer's disease (AD) pathology. These conditions share common risk factors and individuals having both frequently show greater cognitive impairment than those affected by only one disease. Many studies point to early vascular dysregulations in AD. The exchange between vascular and neural cells occurs through mechanisms not completely understood, involving interactions among endothelial, glial, neuronal and smooth muscle cells within the neurovascular unit. Studies suggest that the dysregulation of the unit is likely associated with hypertension and other systemic diseases. Associations between hypertension and cognitive decline are not established, but other variables associated with hypertension could create a causal link. Many studies have lacked a consistent, quantitative neuropsychological approach for assessing cognitive functions. This approach is reductive, as the need for a formal neuropsychological assessment has gained broad recognition, and the definition of dementia has gone through revision processes, which are in progress.
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Future perspectives for the treatment of pulmonary arterial hypertension. J Am Coll Cardiol 2009; 54:S108-S117. [PMID: 19555854 DOI: 10.1016/j.jacc.2009.04.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2009] [Accepted: 04/16/2009] [Indexed: 02/02/2023]
Abstract
Over the past 2 decades, pulmonary arterial hypertension has evolved from a uniformly fatal condition to a chronic, manageable disease in many cases, the result of unparalleled development of new therapies and advances in early diagnosis. However, none of the currently available therapies is curative, so the search for new treatment strategies continues. With a deeper understanding of the genetics and the molecular mechanisms of pulmonary vascular disorders, we are now at the threshold of entering a new therapeutic era. Our working group addressed what can be expected in the near future. The topics span the understanding of genetic variations, novel antiproliferative treatments, the role of stem cells, the right ventricle as a therapeutic target, and strategies and challenges for the translation of novel experimental findings into clinical practice.
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Alp E, Menevse S, Tulmac M, Kan D, Yalcin R, Erkan AF, Cengel A. Lack of Association Between Matrix Metalloproteinase-9 and Endothelial Nitric Oxide Synthase Gene Polymorphisms and Coronary Artery Disease in Turkish Population. DNA Cell Biol 2009; 28:343-50. [DOI: 10.1089/dna.2009.0866] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Ebru Alp
- Department of Medical Biology and Genetics, Faculty of Medicine, Gazi University, Besevler, Ankara, Turkey
| | - Sevda Menevse
- Department of Medical Biology and Genetics, Faculty of Medicine, Gazi University, Besevler, Ankara, Turkey
| | - Murat Tulmac
- Department of Cardiology, Faculty of Medicine, Kirkkale University, Kirkkale, Turkey
| | - Derya Kan
- Department of Medical Genetics, Faculty of Medicine, Gazi University, Besevler, Ankara, Turkey
| | - Ridvan Yalcin
- Department of Cardiology, Faculty of Medicine, Gazi University, Besevler, Ankara, Turkey
| | - Aycan F. Erkan
- Department of Cardiology, Ufuk University, Balgat, Ankara, Turkey
| | - Atiye Cengel
- Department of Cardiology, Faculty of Medicine, Gazi University, Besevler, Ankara, Turkey
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Genetic and pharmacogenetic associations between NOS3 polymorphisms, blood pressure, and cardiovascular events in hypertension. Am J Hypertens 2009; 22:748-53. [PMID: 19407804 DOI: 10.1038/ajh.2009.81] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Polymorphisms in the endothelial nitric oxide synthase (NOS3) gene increase susceptibility to hypertension and cardiovascular disease. We examined genetic and pharmacogenetic associations between NOS3 polymorphisms, blood pressure (BP) control, and cardiovascular events in elderly, hypertensive coronary artery disease (CAD) patients. METHODS Patients with CAD were randomly assigned to either verapamil SR- or atenolol-based antihypertensive treatment and followed for cardiovascular events. Cases (all-cause death, nonfatal myocardial infarction (MI), or nonfatal stroke) and an age-, sex-, race/ethnicity-matched control population were genotyped for the -786T>C and Glu298>Asp polymorphisms in NOS3. On-treatment BP and BP control were compared across genotype groups. Logistic regression was performed to estimate odds ratios (ORs) for the -786T>C and Glu298>Asp polymorphisms in the combined population and in randomized treatment groups. RESULTS Genotype data were available for 256 cases and 769 controls. Among controls, mean on-treatment BP differed according to -786T>C genotype (T/T 137/78 mm Hg, T/C 133/76 mm Hg, C/C 133/75 mm Hg; P = 0.0007 for systolic, P = 0.09 for diastolic) which corresponded to differing rates of BP control (T/T 63%, T/C 72%, C/C 88%; P = 0.002). Neither polymorphisms was associated with case status, with or without regard to assigned treatment. CONCLUSIONS The -786T>C, but not the Glu298>Asp variant of NOS3, may correlate with BP but do not appear to be associated with incident cardiovascular events in patients with established cardiovascular disease. The antihypertensive treatment approach did not appear to alter the genetic contribution to either BP control or cardiovascular events.
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Yarosh DB, Peña A, Brown DA. DNA repair gene polymorphisms affect cytotoxicity in the National Cancer Institute Human Tumour Cell Line Screening Panel. Biomarkers 2008; 10:188-202. [PMID: 16076732 DOI: 10.1080/13547500500138732] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Polymorphisms in DNA repair genes have been suggested to increase the risk of cancer and other diseases, but the epidemiological studies are often not consistent, and the results confusing. We have examined the effect of polymorphisms in base and nucleotide excision-repair genes, as well as regulatory and signalling genes, on cytotoxic sensitivity of tumour cell lines used for screening anticancer drugs by the National Cancer Institute. It was found that for the TP53 P72R and ERCC2 D312N polymorphisms, the heterozygous genotype was most sensitive, while for the OGG1 S326C and NOS3 g.-786T>C polymorphisms the homozygous-variant genotype was most sensitive. The biggest increase in sensitization was found with the XRCC1 R399Q homozygous dominant genotype. The sensitization was found across a broad range of drugs, indicating the importance of DNA repair responses. It was also found that while the other gene polymorphisms were in Hardy-Weinberg equilibrium, the TP53 P72R heterozygous genotype was relatively depleted. For the OGG1 polymorphism, the repair of 8-oxo-guainine from DNA was measured in three panel cell lines that differed in their OGG1 genotype. The cell line with the homozygous-variant genotype had a much poorer repair than the other genotypes, as predicted. The correlation of polymorphisms with cytotoxicity may be an approach to understanding their effects which may be difficult to reveal in epidemiological studies.
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Guldiken B, Sipahi T, Guldiken S, Ustundag S, Budak M, Turgut N, Ozkan H. Glu298Asp polymorphism of the endothelial nitric oxide synthase gene in Turkish patients with ischemic stroke. Mol Biol Rep 2008; 36:1539-43. [DOI: 10.1007/s11033-008-9348-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2008] [Accepted: 08/26/2008] [Indexed: 10/21/2022]
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Ezzidi I, Mtiraoui N, Mohamed MBH, Mahjoub T, Kacem M, Almawi WY. Association of endothelial nitric oxide synthase Glu298Asp, 4b/a, and -786T>C gene variants with diabetic nephropathy. J Diabetes Complications 2008; 22:331-8. [PMID: 18413207 DOI: 10.1016/j.jdiacomp.2007.11.011] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2007] [Revised: 09/03/2007] [Accepted: 11/09/2007] [Indexed: 12/13/2022]
Abstract
BACKGROUND Nitric oxide (NO) produced by endothelial NO synthase (eNOS) mediates a wide range of processes, and abnormal NO production mediated diabetes complications, including diabetic nephropathy (DN). In view of their impact on eNOS activity, polymorphisms in eNOS gene were described as candidates for atherosclerosis and DN. AIMS We evaluated the association of -786T>C (promoter region), Glu298Asp (Exon 7), and 4b4a (Intron 4) polymorphisms in eNOS gene with Type 2 diabetes mellitus (T2DM) and DN by haplotype analysis. SUBJECTS AND METHODS Study subjects comprised 515 DN patients, 402 normoalbuminuric [diabetes with no nephropathy (DWN)] T2DM patients, and 748 healthy subjects. -786T>C and Glu298Asp genotyping were done by PCR-RFLP analysis. RESULTS Higher prevalence of mutant Asp298, 4a, and -786C alleles and homozygous Asp298/Asp298 and 4a/4a genotypes were seen in T2DM patients compared to healthy subjects, with increased Asp298/Asp298 seen in DN compared to DWN patients (P<.05). Three-loci haplotype analysis demonstrated significant association between eNOS variants and T2DM, with protective, neutral, T2DM, and DN-susceptible haplotypes identified, the latter including Asp298/4b/-786T and the Asp298/4a/-786C haplotypes that were present at higher frequencies among DN than among DWN patients. Multivariate regression analysis identified only Asp298/4a/-786T haplotype to be associated with DN (P=.047) after controlling for potential covariates. CONCLUSION Genetic variation at the eNOS locus is associated with T2DM. It can serve as a useful genetic marker of increased susceptibility to T2DM and its complications, including the risk of nephropathy.
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Affiliation(s)
- Intissar Ezzidi
- Research Unit of Haematological and Autoimmune Diseases, Faculty of Pharmacy, Monastir, Center University, Tunisia
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Maiolino G, Cesari M, Sticchi D, Zanchetta M, Pedon L, Antezza K, Pessina AC, Rossi GP. Plasma adiponectin for prediction of cardiovascular events and mortality in high-risk patients. J Clin Endocrinol Metab 2008; 93:3333-40. [PMID: 18697874 DOI: 10.1210/jc.2007-2405] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
CONTEXT The prognostic value of plasma levels of adiponectin, an adipocytokine with antiatherogenic, antiinflammatory, and insulin-sensitizing effects, is contentious. OBJECTIVE The objective of the study was to investigate whether plasma adiponectin levels predict cardiovascular (CV) events and mortality in high-risk coronary artery disease (CAD) patients. DESIGN, SETTING, PARTICIPANTS, AND MAIN OUTCOME MEASURE: We measured plasma adiponectin and examined its impact on the incidence of CV deaths and events at follow-up in the context of all potentially relevant background covariates in 712 high-risk patients of the Genetic and ENvironmental factors in Coronary Atherosclerosis study who underwent coronary angiography for suspected CAD. Based on the population plasma adiponectin median (6.38 microg/ml, interquartile range 4.2-10.2), we split the patients in a high- and a low-plasma adiponectin subgroup. After a median follow-up of 3.8 years (interquartile range 3.3-4.3 yr), outcome data were obtained in 100% of the patients and 45 CV deaths (6.4%) were recorded. Kaplan-Meier analysis unexpectedly showed a higher CV death rate in high-plasma adiponectin than low-plasma adiponectin patients. By contrast, multivariate Cox regression analysis, in which potential confounders, including ongoing medical treatment, were considered, showed no impact of plasma adiponectin on CV death. Similar negative results were obtained using the propensity score that considered all relevant covariables and medical treatment rate, which differed between the high- and low-plasma adiponectin group. CONCLUSIONS In high-risk CAD patients, plasma adiponectin above the median (6.38 microg/ml) implies a paradoxical higher risk of CV death. However, when relevant covariates that differ between high- and low-plasma adiponectin groups are considered, this association wanes, indicating that the clustering of plasma adiponectin with other covariates can abolish its impact on CV prognosis.
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Affiliation(s)
- Giuseppe Maiolino
- Department of Clinical and Experimental Medicine, University of Padova, Padova, Italy
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Kravchenko NA, Yarmysh NV. Regulation of the expression of endothelial nitric oxide synthase and dysfunction of vascular endothelium in cardiovascular pathology. CYTOL GENET+ 2008. [DOI: 10.3103/s0095452708040117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tang FY, Liu FY, Xie XW. Association of angiotensin-converting enzyme and endothelial Nitric Oxide synthase gene polymorphisms with vascular disease in ESRD patients in a Chinese population. Mol Cell Biochem 2008; 319:33-9. [DOI: 10.1007/s11010-008-9874-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2008] [Accepted: 07/03/2008] [Indexed: 11/28/2022]
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Cerebral small vessel disease: genetic risk assessment for prevention and treatment. Mol Diagn Ther 2008; 12:145-56. [PMID: 18510378 DOI: 10.1007/bf03256279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Cerebrovascular disease is a major burden to individuals and their communities worldwide. Stroke is one of the leading causes of death and disability, and the prevention and treatment of stroke can be improved with a better understanding of its causation. Cerebral small vessel disease (SVD) is a subset of cerebrovascular disease, and has an equally large impact on an individual's quality of life. Although many risk factors are involved, we propose that genetics has a significant role in the pathogenesis of SVD through a complex interplay of environmental and multigenetic factors. Advances in molecular technology have enabled the human genome to be investigated both at a population and, more recently, an individual level. A better understanding of the molecular basis of SVD will enable the development of therapies to help in its prevention and treatment. This review assesses the molecular genetics underlying cerebral SVD.
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