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    Dynamic thiol/disulphide homeostasis in patients with Uterine Myoma
    (Elsevier, 2017) Eroglu, Semra; Haskul, Ismail; Aziz, Vusale; Yurtcu, Engin; Karatas, Fatih; Neselioglu, Salim; Erel, Ozcan
    Background: The aim of this study is to measure and compare the dynamic thiol and disulphide homeostasis between patients with Uterine Myoma (UM) and healthy subjects. Material and method: A total of 54 patients with UM who were diagnosed by transvaginal ultrasonography and 37 age-and body mass index-matched healthy individuals were included in this study. Thiol/disulphide homeostasis was measured by a novel automatic spectrophotometric method. Results: The mean serum native thiol, disulphide, and thiol levels were statistically lower in UM group than those in the control group [(284.66 +/- 59.41 mu mol/L vs. 320.98 +/- 56.17 mu mol/L, P < 0.0001), (17.27 +/- 5.59 mu mol/L vs. 22.38 +/- 6.93 mu mol/L P < 0.0001) and (319.21 +/- 61.69 vs. 365.76 +/- 61.46 mu mol/L, P < 0.0001), respectively]. There were no statistically significant differences in ratios of the disulphide/native thiol: native thiol/total thiol, and disulphide/total thiol among patients with UM versus healthy control group (P = 0.096, 0.092, 0.092, respectively). Conclusion: It was found that the native thiol, total thiol, and disulphide levels in patients with UM decreased while the ratio of native thiol/disulphide remained unchanged. It is necessary to investigate whether these findings have a role in the etiology and clinical course of the UM. (C) 2017 Elsevier B.V. All rights reserved.
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    The relationship of thiol/disulfide homeostasis in the etiology of patients with obstructive sleep apnea: a case-control study
    (Taylor & Francis Ltd, 2020) Dikis, Ozlem Sengoren; Acat, Murat; Casim, Hasan; Haskul, Ismail; Neselioglu, Salim; Simsek, Abdullah; Erel, Ozcan
    Aim: Obstructive sleep apnea syndrome (OSAS) is a chronic and incapacitating disease that often requires lifelong care. This study aimed to evaluate the thiol/disulfide homeostasis in patients with OSAS, to compare the thiol/disulfide levels with the control group and to investigate their relationship with the severity of the disease. Material and methods: Patients who were admitted to the department of chest diseases, and diagnosed with OSAS using polysomnographic analysis (n = 186) and 144 patients who underwent polysomnography due to some reasons but ruled out of having OSAS were included in the study. Serum total thiol (TT), native thiol (SH), and disulfide thiol (SS) levels were measured from the participants; SS/SH, SS/TT, and SH/TT percent ratios were calculated and compared between the patient and control groups. Results: The mean (+/- SD) age of the patients and control participants was 52.0 +/- 11.5 years and 44.9 +/- 13.2 years, respectively. Compared to the control group, patients with OSAS had significantly lower SH (239.3 +/- 56.3 mu mol/L vs. 258.6 +/- 65.3 mu mol/L, t = 2.70, p =.007) and TT levels (273.2 +/- 60.1 mu mol/L vs. 292.9 +/- 67.5 mu mol/L, t = 2.64, p=.010). Age (OR = 1.04), serum albumin (OR = 12.67), ischemia-modified albumin (IMA) (OR = 0.12), SH (OR = 0.81), and TT (OR = 1.17) were independent predictors of OSAS. Conclusions: These results support the idea that decreased ST and TT levels are related to increased oxidative stress. On the other hand, impaired thiol balance may play a significant role in the pathogenesis of OSAS.