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A novel oxidative stress marker in patients with Alzheimer’s disease: dynamic thiol–disulphide homeostasis

Published online by Cambridge University Press:  04 April 2016

Sadiye Gumusyayla ,
Gonul Vural ,
Hesna Bektas ,
Orhan Deniz ,
Salim Neselioglu  and
Ozcan Erel
Sadiye Gumusyayla*
Affiliation:
Department of Neurology, Faculty of Medicine, Yıldırım Beyazıt University, Ankara, Turkey
Gonul Vural
Affiliation:
Department of Neurology, Faculty of Medicine, Yıldırım Beyazıt University, Ankara, Turkey
Hesna Bektas
Affiliation:
Department of Neurology, Ankara Atatürk Education and Research Hospital, Ankara, Turkey
Orhan Deniz
Affiliation:
Department of Neurology, Faculty of Medicine, Yıldırım Beyazıt University, Ankara, Turkey
Salim Neselioglu
Affiliation:
Department of Biochemistry, Ankara Atatürk Education and Research Hospital, Ankara, Turkey
Ozcan Erel
Affiliation:
Department of Biochemistry, Faculty of Medicine, Yıldırım Beyazıt University, Ankara, Turkey
*
Sadiye Gumusyayla, MD, Department of Neurology, Faculty of Medicine, Yıldırım Beyazıt University, Ankara, Turkey. Tel: +90 506 282 0234; Fax: +90 312 291 2706; E-mail: sadiyetemel@yahoo.com
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Abstract

Objective

The aim of this study was to evaluate the dynamic thiol–disulphide homeostasis as an oxidative stress parameter, using a newly proposed method, in patients with Alzheimer’s disease.

Methods

In total, 97 participants were included in the study. Among them, 51 had been diagnosed with Alzheimer’s disease, and the remaining 46 were healthy individuals. Total thiol (–SH+–S–S–) levels and native thiol (–SH) levels in serum of each participant were measured. The amount of dynamic disulphide bonds (–S–S–) and (–S–S–) ×100/(–SH), (–S–S–) ×100/(–SH+–S–S–), and –SH×100/(–SH+–S–S–) ratios were calculated from these values. The obtained data were used to compare Alzheimer’s disease patients with healthy individuals.

Results

The average total thiol and native thiol levels of patient with Alzheimer’s disease in the study were found to be significantly lower than those levels of healthy individuals. In addition, in the patient group, the –S–S–×100/–S–S+–SH ratio was found to be significantly higher, whereas the –SH×100/–S–S+–SH ratio was found to be significantly lower compared with healthy individuals. Total thiol and native thiol levels, dynamic disulphide bond amount, and –S–S–×100/–SH, –S–S–×100/–S–S+–SH, and –SH×100/–S–S+–SH ratios were not found to be correlated with mini mental state examination score or duration of disease.

Conclusion

Recent studies have shown that oxidative stress is the one of the molecular changes underlying the pathogenesis of Alzheimer’s disease. In this study, we have investigated the dynamic thiol–disulphide homeostasis in patients with Alzheimer’s disease, using a novel method.

Keywords

Alzheimer’s diseasedynamic thiol–disulphide homeostasisoxidative stressthiol metabolism
Type
Original Articles
Information
Acta Neuropsychiatrica , Volume 28 , Issue 6 , December 2016 , pp. 315 - 320
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Copyright
© Scandinavian College of Neuropsychopharmacology 2016 

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