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Articles by Sevil KURBAN
Total Records ( 3 ) for Sevil KURBAN
  Sevil KURBAN and Idris Idris MEHMETOGLU

Background: The present study investigated the effect of alcohol consumption on total antioxidant activity (AOA) and nitric oxide (NO) levels in the sera and brains of rats.

Materials and methods: The study included 24 rats that were divided into 2 groups: the control group (n = 12) and the alcohol group (n = 12). Both groups were fed regular laboratory chow and tap water for a period of 2 months; however, the alcohol group received 15% (v/v) ethanol in their drinking water. Then, the rats were decapitated, and serum and brain AOA and NO levels were measured.

Results: Both serum and brain AOA of the alcohol group were significantly lower than those of the control group. Serum NO levels of the alcohol group were significantly higher, whereas brain NO levels were lower, but not significantly, than those of the control group.

Conclusion: Our findings show that alcohol diminished both serum and brain defense mechanisms against free radical attack, which might result in many diseases. Moreover, decreased AOA levels in the alcohol group might be a significant cause of increased serum NO levels in this group or vice versa: however, the effects of alcohol on brain NO levels require further investigation.

  Idris Mehmetoglu , Gulsum Yilmaz , Sevil Kurban , Hasan Acar and M. Akif Duzenli
  Nitric oxide (NO) plays a major role in the regulation of vascular tone. Production of NO can be influenced by polymorphisms of the endothelial NO synthase (eNOS) gene, which may be associated with the pathogenesis of essential hypertension (EHT). Therefore, eNOS gene intron 4 a/b variable number of tandem repeats (VNTR) and intron 23 polymorphisms were investigated in patients with EHT living in a central area of Turkey. Materials and methods: The study was performed in 91 patients (34 M, 57 F) with EHT, aged 38-76 years, and 75 age- and sex-matched healthy controls (35 M, 40 F). eNOS gene polymorphisms were detected by polymerase chain reaction method. Results: There was no significant difference between the G-allele frequency of the G10-T polymorphism in intron 23 and intron 4 a/b VNTR polymorphism of the eNOS gene in EHT patients and in the controls. Conclusion: eNOS gene intron 4 a/b VNTR and intron 23 gene polymorphisms were not associated with EHT patients living in a central area of Turkey. Further studies are needed to investigate whether these 2 polymorphisms of the eNOS gene could represent useful genetic markers for indentifying individuals at risk of developing EHT.
  Aim: To examine the effects of ASA on serum nitric oxide (NO), asymmetric dimethylarginine (ADMA), and homocysteine levels in healthy volunteers. Materials and methods: Totally, 26 apparently healthy volunteers were enrolled in the study. Of the participants, 13 (5F, 8M) received 100 mg of ASA daily and 13 (5F, 8M) received 150 mg of ASA daily for 2 months. Serum NO, ADMA, and homocysteine levels were measured before and 1 and 2 months after ASA treatment Serum NO, ADMA, and homocysteine levels were measured before and 1 and 2 months after ASA treatment. Results: ADMA levels of the group receiving 150 mg of ASA were significantly reduced after 2 months of treatment (P < 0.05). NO levels of both groups were slightly but not significantly increased and homocysteine levels of both groups were slightly reduced after ASA treatment compared to the baseline values. Conclusion: Our findings indicate that ASA treatment reduces ADMA levels dose and time dependently, a beneficial effect that may contribute to the prevention of cardiovascular diseases.
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