Duygu Ozel

Ankara University, Engüri, Ankara, Turkey

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Publications (6)15.25 Total impact

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    ABSTRACT: Polymorphism in plasminogen activator inhibitor-1 gene is suggested to be associated with an increased risk of venous thromboembolism. The aim of this study was to investigate the association of plasminogen activator inhibitor-1 gene polymorphism and its coexistence with factor-V-Leiden and prothrombin-20210 mutations in pulmonary thromboembolism. The authors investigated plasminogen activator inhibitor-1 4G/5G polymorphism, factor-V-Leiden, and prothrombin-20210 mutations in 143 pulmonary thromboembolism patients and 181 controls. Plasminogen activator inhibitor-1 4G/4G, 4G/5G, and 5G/5G gene polymorphisms and prothrombin-20210 mutations were not different between cases and controls. Factor-V-Leiden mutation was present in 21.0% and 7.7% of the cases and controls, respectively, P = .001. Neither different plasminogen activator inhibitor-1 genotypes and 4G allele nor coexistence of the allele with factor-V-Leiden or prothrombin-20210 was associated with the risk of recurrence. As a result, plasminogen activator inhibitor-1 gene polymorphism or its concomitant presence with mentioned mutations was not found to be associated with increased risk for pulmonary thromboembolism or recurrent disease in this study.
    No preview · Article · Jan 2008 · Clinical and Applied Thrombosis/Hemostasis
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    ABSTRACT: Atherothrombotic complications in insulin resistance are partly attributed to impaired fibrinolysis caused by increased PAI-1 plasma levels, and 4G/5G promotor polymorphism of the PAI-1 gene may modulate PAI-1 transcription. To investigate PAI-1-675 4G/5G allele gene polymorphism and its relationship with obesity in children. CHILDREN AND METHOD: The study participants were 133 apparently healthy non-obese children, 24 probable exogenously obese without family history (Group I), 66 probable familial obese (Group II), and 44 obese children who were referred to the pediatric endocrinology department with any complication of obesity (Group III). Group I and Group II obese children were gathered from a school-based epidemiological study. Incidence of obesity was 19% in a school with high socio-economic status, whereas it was 4% in a school with low socio-economic status. Frequencies of 4G/4G gene polymorphisms were 24.81%, 37.50%, 64.80% and 61.11% in the control group, and groups I, II, and III, respectively. In groups II and III, 4G/4G gene polymorphism, and in non-obese control children 5G/5G gene polymorphism, was common. In obese children in the presence of family history for obesity and metabolic syndrome (odds ratio [OR]: 4.48, 95% confidence interval [CI]: 1.26-15.82), carriage of the 4G allele either in heterozygous or homozygous state increased the risk of vascular disease (OR: 6.10, 95% CI 1.64-22.90). In patients with acanthosis nigricans, high HOMA-IR values, hypertriglyceridemia and elevated atherogenic index, 4G/4G genotype frequency was remarkably higher compared to patients with other features of metabolic syndrome. The increasing prevalence of childhood obesity in high socio-economic status is associated with health risks. In obese children with family history of obesity and cardiovascular disease or type 2 diabetes mellitus and in obese children who had any feature of metabolic syndrome, frequency of 4G/4G genotype was more than the 4G/5G and 5G/5G genotypes in the PAI-1 gene. These patients can be at increased risk for developing vascular disease. Acanthosis nigricans, high HOMA-IR value, hypertriglyceridemia and high atherogenic index can also reflect the high risk of vascular disease in metabolic syndrome.
    No preview · Article · Jun 2006 · Journal of pediatric endocrinology & metabolism: JPEM
  • M Arisoy · D Aysev · M Ekim · D Ozel · S K Köse · E D Ozsoy · N Akar
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    ABSTRACT: A total of 161 Escherichia coli (E. coli) strains isolated from children with urinary tract infection (UTI) were analysed for the genes encoding the virulence factors such as pyelonephritis (pap), s fimbriae (sfa), afimbrial adhesin I (afaI), haemolysin (hly), cytotoxic necrotising factor I (cnf I) and aerobactin (aer) by multiplex PCR. Ninety-four E. coli strains were found to carry at least one virulence factor. Therefore, 58.38% of total population was positive for one virulence gene at least. Percentage of genes within the total population for pap, sfa, afaI, hly, cnf I and aer was found as 22.98, 6.21, 9.94, 1.24, 9.94 and 39.75, respectively. Our analysis showed that sfa-pap (p < 0.001); pap-aer, afaI-aer and cnf I-pap (P < 0.05) and hly-sfa (p < 0.01) significantly co-occurred in their respective samples. In the light of these findings, we suggest an important role of pap causing UTI.
    No preview · Article · Feb 2006 · International Journal of Clinical Practice
  • N Akar · A Ozturk · D Ozel · E Akar · M Ekim

    No preview · Article · Jan 2006 · Journal of nephrology

  • No preview · Article · Mar 2003 · Pediatric Nephrology
  • Nejat Akar · Refik Gökdemir · Duygu Ozel · Ece Akar

    No preview · Article · Jan 2003 · Thrombosis and Haemostasis