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  • Küçük Resim
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    Evaluation of ACE2 and AT2R polymorphisms in patients with asthma
    (Wiley-Blackwell, 2015) Ayada, Ceylan; Toru, Ümran; Genç, Osman; Şahin, Server; Taşkın, Emre; Yaşar, Zehra
  • Küçük Resim
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    The evaluation of genotype and allele frequencies of angiotensinogen M235T polymorphism in patients with asthma
    (Wiley-Blackwell, 2015) Ayada, Ceylan; Toru, Ümran; Genç, Osman; Şahin, Server; Taşkın, Emre; Yaşar, Zehra
  • Küçük Resim
    Öğe
    Evaluation of multidrug resistance-1 gene C > T polymorphism frequency in patients with asthma
    (Hospital Clinicas, Univ Sao Paulo, 2015) Toru, Ümran; Ayada, Ceylan; Genç, Osman; Yaşar, Zehra; Şahin, Server
    OBJECTIVES: Asthma is a chronic inflammatory lung disease characterized by bronchial hyperresponsiveness and airflow obstruction. Genetic and oxidative stress factors, in addition to pulmonary and systemic inflammatory processes, play a pivotal role in the pathogenesis of asthma. The products of the multidrug resistance-1 gene protect lung tissue from oxidative stress. Here, we aimed to evaluate the association between the multidrug resistance-1 gene C>T polymorphism and asthma with regard to oxidative stress-related parameters of asthmatic patients. METHODS: Forty-five patients with asthma and 27 healthy age-matched controls were included in this study. Blood samples were collected in tubes with ethylenediaminetetraacetic acid. DNA was extracted from the blood samples. The multidrug resistance-1 gene polymorphism was detected by polymerase chain reaction and a subsequent enzyme digestion technique. The serum levels of total oxidant status and total antioxidant status were determined by the colorimetric measurement method. RESULTS: The heterozygous polymorphic genotype was the most frequent in both groups. A significant difference in the multidrug resistance-1 genotype frequencies between groups indicated an association of asthma with the TT genotype. A significant difference between groups was found for wild type homozygous participants and carriers of polymorphic allele participants. The frequency of the T allele was significantly higher in asthmatic patients. The increase in the oxidative stress index parameter was significant in the asthma group compared with the control group. CONCLUSIONS: The multidrug resistance-1 gene C/T polymorphism may be an underlying genetic risk factor for the development of asthma via oxidant-antioxidant imbalance, leading to increased oxidative stress.