scholarly journals Prevalence of endothelial nitric oxide synthase (ENOS) gene G894T polymorphism and its association with hypertension: a population-based study with Brazilian women

2019 ◽  
Vol 4 (1) ◽  
pp. 63-73
Author(s):  
Abel Barbosa Lira Neto ◽  
Myrla C. O. Farias ◽  
Nancy B. R. Vasconcelos ◽  
Antonio F. Xavier Jr ◽  
Monica L. Assunção ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Endothelial Nitric Oxide Synthase ◽  
Population Based ◽  
Enos Gene ◽  
Population Based Study ◽  
Oxide Synthase ◽  
Endothelial Nitric Oxide ◽  
G894t Polymorphism

The Influence Of Endothelial Nitric Oxide Synthase (Enos) Genetic Polymorphisms On Cholesterol Blood Levels Among Type 2 Diabetic Patients On Atorvastatin Therapy

2020 ◽  
Vol 20 ◽  
Author(s):  
Sarah Abdullah ◽  
Yazun Jarrar ◽  
Hussam Alhawari ◽  
Eyada Abed ◽  
Malek Zihlif
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Lipid Profile ◽  
Genetic Polymorphisms ◽  
Endothelial Nitric Oxide Synthase ◽  
Diabetic Patients ◽  
Enos Gene ◽  
Oxide Synthase ◽  
Endothelial Nitric Oxide

Background: Endothelial nitric oxide synthase (eNOS) plays a major role in the response of antihypercholesterol statin drugs. Genetic polymorphisms in the eNOS gene affect the activity of eNOS and thereby modulate statin response. Objectives: This study investigated the influence of major functional eNOS gene polymorphisms (rs2070744, rs1799983, and rs61722009) on the lipid profile of type 2 diabetes mellitus (T2DM) Jordanian patients treated with atorvastatin. Methods: The sample comprised 103 T2DM patients who attended the diabetes clinic of Jordan University Hospital. The T2DM patients had regularly been taking 20 mg atorvastatin. The atorvastatin response was calculated by measuring the lipid profile before and after three months of atorvastatin treatment. The eNOS genotypes of the subjects were analyzed using polymerase chain reaction (PCR) followed by restriction fragment length polymorphism (RFLP) assay. Results: No significant association was found between eNOS genetic polymorphisms and the response to atorvastatin (ANOVA, p > 0.05). In addition, no significant difference in the frequency of eNOS genotypes was found between T2DM patients and healthy subjects. However, patients with eNOS rs1799983, 4a/4a, and rs61722009 G/G genotypes showed a significantly lower levels of baseline total cholesterol (TC) and low density lipoprotein (LDL) than did patients carrying the rs1799983 4b/4b or rs61722009 T/T genotype (p < 0.05). The eNOS rs1799983 and rs61722009 polymorphisms were in complete linkage disequilibrium (D' = 1). Conclusion: Although no association was found between eNOS genetic polymorphisms and atorvastatin response, there was a significant association between the rs1799983 and rs61722009 genotypes and baselines levels of TC and LDL in Jordanian T2DM patients. These genetic variants affect cholesterol levels and may play a role in the susceptibility to cardiovascular diseases in T2DM patients. Further studies are needed to validate these findings.

scholarly journals Hyperhomocysteinemia, Endothelial Nitric Oxide Synthase Polymorphism, and Risk of Coronary Artery Disease

2006 ◽  
Vol 52 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Mohsen Kerkeni ◽  
Faouzi Addad ◽  
Maryline Chauffert ◽  
Anne Myara ◽  
Mohamed Ben Farhat ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Coronary Artery Disease ◽  
Coronary Artery ◽  
Endothelial Nitric Oxide Synthase ◽  
Tunisian Population ◽  
Enos Gene ◽  
Artery Disease ◽  
Oxide Synthase ◽  
Endothelial Nitric Oxide ◽  
G894t Polymorphism

Abstract Background: Hyperhomocysteinemia is an independent, graded risk factor for coronary artery disease (CAD). The G894T variant of endothelial nitric oxide synthase (eNOS) was postulated to be associated with hyperhomocysteinemia and could influence individual susceptibility to CAD. The aims of this study were to investigate (a) the relationship of the eNOS G894T polymorphism with the presence and the severity of CAD and (b) the possible relationship between hyperhomocysteinemia and the eNOS G894T variant for the risk of CAD severity in a Tunisian population. Methods: We used PCR with restriction fragment length polymorphism analysis to detect the G894T variant of the eNOS gene in 100 patients with CAD and 120 healthy controls. The severity of CAD was expressed by the number of affected vessels. Total plasma homocysteine concentrations were determined by direct chemiluminescence assay. Results: The frequencies of the eNOS GG, GT, and TT genotypes in the CAD group were significantly different from those in the control group (45%, 44%, and 11% vs 60%, 35.8% and 4.2%, respectively; P = 0.035). There was no association between the eNOS G894T genotype frequencies and the number of stenosed vessels (P = 0.149). In the CAD group, the coexistence of the 894 GT or TT genotypes and hyperhomocysteinemia led to an increased risk of CAD severity. Conclusion: The G894T polymorphism of the eNOS gene is associated with the presence of CAD, and in conjunction with hyperhomocysteinemia, increased the risk of CAD severity in a Tunisian population.

scholarly journals Endothelial Nitric Oxide Synthase Gene Single-Nucleotide Polymorphism Predicts Cerebral Vasospasm after Aneurysmal Subarachnoid Hemorrhage

2008 ◽  
Vol 28 (6) ◽  
pp. 1204-1211 ◽  
Author(s):  
Robert M Starke ◽  
Grace H Kim ◽  
Ricardo J Komotar ◽  
Zachary L Hickman ◽  
Eric M Black ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Subarachnoid Hemorrhage ◽  
Nitric Oxide Synthase ◽  
Cerebral Vasospasm ◽  
Endothelial Nitric Oxide Synthase ◽  
Aneurysmal Subarachnoid Hemorrhage ◽  
Enos Gene ◽  
Single Nucleotide ◽  
Oxide Synthase ◽  
Endothelial Nitric Oxide

Vasospasm is a major cause of morbidity and mortality after aneurysmal subarachnoid hemorrhage (aSAH). Studies have shown a link between single-nucleotide polymorphisms (SNPs) in the endothelial nitric oxide synthase (eNOS) gene and the incidence of coronary spasm and aneurysms. Alterations in the eNOS T-786 SNP may lead to an increased risk of post-aSAH cerebral vasospasm. In this prospective clinical study, 77 aSAH patients provided genetic material and were followed for the occurrence of vasospasm. In multivariate logistic regression analysis, genotype was the only factor predictive of vasospasm. The odds ratio (OR) for symptomatic vasospasm in patients with one T allele was 3.3 (95% confidence interval (CI): 1.1 to 10.0, P=0.034) and 10.9 for TT. Patients with angiographic spasm were 3.6 times more likely to have a T allele (95% CI: 1.3 to 9.6, P=0.013; for TT: OR 12.6). Patients with severe vasospasm requiring endovascular therapy were more likely to have a T allele (OR 3.5, 95% CI: 1.3 to 9.5, P=0.016; for TT: OR 12.0). Patients with the T allele of the eNOS gene are more likely to have severe vasospasm. Presence of this genotype may allow the identification of individuals at high risk for post-aSAH vasospasm and lead to early treatment and improved outcome.

The relationships between endothelial nitric oxide synthase polymorphisms and the formation of intracranial aneurysms in the Korean population

2011 ◽  
Vol 30 (6) ◽  
pp. E23 ◽  
Author(s):  
Tae Gon Kim ◽  
Nam Keun Kim ◽  
Min Jung Baek ◽  
Ryoung Huh ◽  
Sang Sup Chung ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Nitric Oxide Synthase ◽  
Patient Group ◽  
Endothelial Nitric Oxide Synthase ◽  
Gene Polymorphisms ◽  
Intracranial Aneurysms ◽  
Korean Population ◽  
Enos Gene ◽  
Oxide Synthase ◽  
Endothelial Nitric Oxide

Object Some genetic factors are known to be associated with the formation of cerebral aneurysms in the Caucasian population. One of these factors is endothelial nitric oxide synthase (eNOS) gene polymorphisms. Endothelial nitric oxide synthase genes encode eNOS, which synthesizes NO from l-arginine. There continues to be controversy about the relationships between eNOS gene polymorphisms and the formation of intracranial aneurysms. In this study, the authors evaluated these relationships in the Korean population. Methods Three eNOS polymorphisms (eNOS 27VNTR, T786C, and G894T) were genotyped in 96 patients with ruptured aneurysms, 53 patients with unruptured aneurysms, and in 121 volunteers via polymerase chain reaction–restriction fragment length polymorphism analysis. Results The mean ages of the patients and healthy volunteers were 52.9 ± 12.3 years and 55.2 ± 9.1 years, respectively. The patient group was composed of 56 men and 93 women, and the healthy volunteer group was composed of 46 men and 75 women. Only the incidence of smoking history was significantly higher in the patient group than in the control group (p = 0.001). The genotypic frequencies for the 3 eNOS gene polymorphisms were in agreement with those predicted by Hardy-Weinberg equilibrium. There were no significant associations between the eNOS recessive models and the formation of an aneurysm. The authors found no genotypic differences between similar races among patients with aneurysms. Conclusions The present study shows that eNOS 27VNTR, T786C, and G894T polymorphisms cannot be used as indicators of the formation of intracranial aneurysms in Korean patients. To confirm these findings an additional analyses might need to be performed using a larger sample size. There were no differences in the genotypic distributions and allelic frequencies between similar races among patients with aneurysms, which were the same in previously reported normal populations.

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