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    Glutathione S-Transferase M1 and T1 Gene Polymorphisms in Patients with Chronic Plaque-Type Psoriasis: A Case-Control Study
    (Karger, 2016) Solak, Berna; Karkucak, Mutlu; Turan, Hakan; Ocakoğlu, Gökhan; Sağ, Şebnem Özemri; Uslu, Esma; Erdem, Teoman
    Objective: To determine the role of glutathione S-transferase (GST) isoenzyme polymorphisms as susceptibility factors in patients with psoriasis in a Turkish cohort. Subjects and Methods: In this case-control study, 105 patients with plaque-type psoriasis and 102 healthy controls were recruited from the dermatology outpatient clinics of two university hospitals. Genomic DNA was extracted from whole blood using a DZ DNA isolation kit. Multiplex PCR was used to determine GSTM1 and GSTT1 polymorphisms in the isolated DNAs. Results: Of the 150 patients with psoriasis, 83 (79%) were identified with the GSTT1 genotype and 22 (21%) with the null genotype. Of the 102 patients in the control group, 69 (67.6%) subjects were identified with the GSTT1 genotype and 33 (32.4%) with the null genotype. There was no significant difference between the patient and control groups (p = 0.063). Regarding the GSTM1 polymorphism, 54 (51.4%) patients were identified with this genotype and 51 (48.6%) with the null genotype; in the control group, 50 (49%) were identified with this genotype and 52 (51%) with the null genotype. Again there was no statistically significant difference between the groups (p = 0.957). Conclusion: In this Turkish cohort of patients with psoriasis, neither GSTT1 nor GSTM1 polymorphisms were associated with disease susceptibility. Larger studies with a wider range of GST isoenzyme are needed. (C) 2015 S. Karger AG, Basel
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    MBL2 Gene Polymorphism and Risk of Vitiligo in Turkish Patients
    (Kamla-Raj Enterprises, 2015) Karkucak, Mutlu; Solak, Berna; Turan, Hakan; Uslu, Esma; Yakut, Tahsin; Aliağaoğlu, Cihangir; Erdem, Teoman
    Mannose-Binding Lectin (MBL) plays an important role in innate immunity. MBL2 gene polymorphisms affect MBL serum levels. Therefore, this increases the risk of infection and may result in predisposition to autoimmune diseases. The aim of this study was to investigate whether there is an association between the MBL2 gene codon 54 (allele B: rs1800450, c. 161G>A; p. 54Gly>Asp) polymorphism and vitiligo in Turkish patients. One hundred and one patients who were diagnosed with vitiligo and 101 control subjects were included in the study. The DNA was analyzed using the Kbioscience Competitive Allele Specific PCR (KASP) technique. MBL2 gene codon 54 polymorphism frequencies were compared between the two groups. In statistical analysis, the level of significance was set at p<0.05. No significant differences in frequencies of the A allele were observed between the patient and control groups. It was observed at similar frequencies in both groups (p=0.890). The results suggest that the MBL2 gene Codon 54 polymorphism is not associated with an increased risk for the development of vitiligo in Turkish patients.