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    Assessment of the left atrial volume index and plasma NT-proANP level in patients with acute ST-elevation myocardial infarction
    (Hospital Clinicas, Univ Sao Paulo, 2013) Bacaksiz, Ahmet; Vatankulu, Mehmet Akif; Kayrak, Mehmet; Telli, Hasan Huseyin; Ayhan, Selim S.; Sonmez, Osman; Alp, Ayse
    OBJECTIVES: Acute ST-elevation myocardial infarction is associated with ventricular dysfunction due to ischemia-induced progressive myocardial damage. The decrease in ventricular compliance causes left atrial dilatation and stretching of the atrial myocardium, which are the main stimuli for the secretion of atrial natriuretic peptide. The aim of this study was to evaluate left atrial dimensions and atrial natriuretic peptide levels in patients early after their first acute ST-elevation myocardial infarction and assess the probable interaction between coronary lesions and these measurements. METHODS: A total of 110 patients with acute myocardial infarction and 50 controls were studied. Plasma atrial natriuretic peptide was measured at admission. Left ventricular function, diameter, and volume index were evaluated using transthoracic echocardiography. Gensini and vessel scores of the patients who underwent coronary angiography were calculated. RESULTS: Plasma atrial natriuretic peptide in the patients with myocardial infarction was increased compared with that in controls (3.90 +/- 3.75 vs. 1.35 +/- 0.72 nmol/L, p<0.001). Although the left atrial diameter was comparable in patients and controls, the left atrial volume index was increased in patients with acute myocardial infarction (26.5 +/- 7.1 vs. 21.3 +/- 4.9 mL/m(2), p<0.01). Multivariate regression analysis showed a strong independent correlation between the left atrial volume index and the plasma atrial natriuretic peptide level (beta = 0.23, p = 0.03). CONCLUSIONS: The left atrial volume index and plasma atrial natriuretic peptide level were correlated in patients with acute myocardial infarction.
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    The effect of the SIRT1 2827 A > G polymorphism, resveratrol, exercise, age and occupation in Turkish population with cardiovascular disease
    (Turkish Soc Cardiology, 2015) Izmirli, Müzeyyen; Goktekin, Omer; Bacaksiz, Ahmet; Uysal, Omer; Kilic, Ulkan
    Objective: Cardiovascular disease (CVD) is the leading cause of death in Europe. One of the candidate molecule affecting epigenetic mechanisms of CVD is the SIRT1, a subclass of sirtuins, is located on the long arm of chromosome 10 (10q21.3). Particularly, the relation between 2827 A>G polymorphism of the SIRT1 positioned on exon 2, leading to conversion of histidine to arginine, and the formation of CVD is not known yet. One of the activator of SIRT1, resveratrol, is also known as a cardioprotective molecule. On the other hand, the parameters including exercise, occupation and age affect CVD. The aim of the present study was to investigate the effect of the rs144124002 (2827 A>G) single nucleotide polymorphisms (SNP) of SIRT1 and exercise-occupation-age parameters on CVD. Methods: SNP of SIRT1 were analyzed using DNA isolation, the polymerase chain reaction (PCR) and restriction fragment length polymorphism. To do so, large cohorts of CVD patients (n=293) and healthy controls (n=117) who directed Cardiology Department of Bezmialem Vakif University, Bezmialem Vakif University Hospital were used. Results: In this study, when we assessed CVD and control groups about 2827 A>G polymorphism, all individuals were determined as homozygous genotype. We found a positive effect between the modifications of resveratrol, exercise, age and occupation and CVD (OR=0.17; CI 95%, 0.1-0.2; p <= 0.001). Conclusion: This is the first study demonstrating the correlation between the SIRT1 rs144124002 polymorphism and CVD in Turkish population.
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    SIRT1 Gene Polymorphisms Affect the Protein Expression in Cardiovascular Diseases
    (Public Library Science, 2014) Kilic, Ulkan; Gok, Ozlem; Bacaksiz, Ahmet; Izmirli, Muzeyyen; Elibol-Can, Birsen; Uysal, Omer
    Cardiovascular disease (CVD), the leading cause of death worldwide, is related to gene-environment interactions due to epigenetic factors. SIRT1 protein and its downstream pathways are critical for both normal homeostasis and protection from CVD-induced defects. The aim of this study was to investigate the association between SIRT1 single nucleotide polymorphisms (SNPs) (rs7895833 A>G in the promoter region, rs7069102 C>G in intron 4 and rs2273773 C>T in exon 5 silent mutation) and SIRT1 and eNOS (endothelial nitric oxide synthase) protein expression as well as total antioxidant status (TAS), total oxidant status (TOS) and oxidative stress index (OSI) in CVD patients as compared to controls. The frequencies of mutant genotypes and alleles for rs7069102 and rs2273773 were significantly higher in patients with CVD compared to control group. The risk for CVD was increased by 2.4 times for rs7069102 and 1.9 times for rs2273773 in carriers of mutant allele compared with carriers of wild-type allele pointing the protective role of C allele for both SNPs against CVD. For rs7895833, there was no significant difference in genotype and allele distributions between groups. SIRT1 protein, TAS, TOS and OSI levels significantly increased in patients as compared to control group. In contrast, level of eNOS protein was considerably low in the CVD patients. An increase in the SIRT1 expression in the CVD patients carrying mutant genotype for rs7069102 and heterozygote genotype for all three SNPs was observed. This is the first study reporting an association between SIRT1 gene polymorphisms and the levels of SIRT1 and eNOS expressions as well as TAS, TOS and OSI.