Tıp Fakültesi / Faculty of Medicine

Permanent URI for this collectionhttps://hdl.handle.net/11727/1403

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Author: search.filters.author.Kotan, Vahap Ozansearch.filters.applied.f.rights: search.filters.rights.info:eu-repo/semantics/closedAccess

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    Thiol/Disulphide Homeostasis in Bipolar Disorder
    (2018) Erzin, Gamze; Kotan, Vahap Ozan; Topcuoglu, Canan; Ozkaya, Guven; Erel, Ozcan; Yuksel, Rabia Nazik; Urer, Emre; Aydemir, Makbule Cigdem; Goka, Erol; 29329041
    Bipolar disorder (BD) patients have increased oxidative stress, which can disturb thiol/disulphide homeostasis, causing disulphide formation. The aim of the study is to investigate dynamic thiol/disulphide (SH/SS) homeostasis in BD patients, which is a novel evaluation method of oxidative status. Ninety-four BD patients (50 in the manic episode and 44 in remission) and 44 healthy controls were included in the study. Blood serum native thiol (SH) and total thiol (ToSH) concentrations were measured in a paired test. The half value of the difference between native thiol and total thiol concentrations was calculated as the disulphide (SS) bond amount. Serum native thiol levels of the mania group were found to be lower than the remission and the control groups. There was a significant difference between the remission group and the control group in terms of native thiol. Serum total thiol level was lower in mania group than the control group. Detection of oxidative molecules for BD could be helpful, especially in treatment, follow-up periods and reducing morbidity. The results of our study besides the data available in the literature support that thiol and disulphide levels are useful markers for BD and promising therapeutic targets in terms of future pharmacological modulation.
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    Differences in Sociodemographic Characteristics, Clinical Features and Serum Liver Function Tests of Male Cannabis and Synthetic Cannabinoid Users
    (2017) Kotan, Vahap Ozan; Yucens, Bengu Baz; Kotan, Zeynep; Ozkaya, Guven; Okay, Ihsan Tuncer; Tikir, Baise; Goka, Erol
    Objective: Synthetic cannabinoid (SC) use has recently become a growing substance abuse problem, with serious harmful clinical effects. Young males, especially cannabis (C) users, are at great risk of SC use. The aim of this study is to determine sociodemographic characteristics, clinical features and serum liver function tests of SC users and compare with those of C users. Methods: Out of 118 SC users applied to outpatient clinic of Ankara Numune Training and Research Hospital Alcohol and Substance Addiction Treatment Center, 74 males included in this cross-sectional study. Patients with a concurrent use of any medication or substance other than C/SCs or patients with any physical illness which could affect serum liver function tests were excluded. 44.6% (n=33) of 74 patients were only SC users at least for last three months and 55.4% (n=41) were combined C and SC (C&SC) users. SC users were compared with 34 age and BMI-matched only C using males. Results: Rates of being single and divorced; rates of living with friends and alone were found to be higher in SC users. Adverse effects and withdrawal sypmtoms were found to be similar in C users and SC users. According to serum liver function test results, levels of gama-glutamil transpeptidase, alkaline phosphatase, total/direct bilirubin, albumin, prothrombin time and international normalized ratio were similar. Serum aspartate aminotransferase levels (31.2 +/- 22.0 IU/L and 41.5 +/- 21.5 IU/L respectively, p=0.026) and serum alanine aminotransferase levels (28.4 +/- 18.9 IU/L and 44.3 +/- 25.9 IU/L respectively, p=0.015) differed between C users and C&SC users. Results in this study revealed that increased serum levels of aminotransferases were especially associated with combined use of C and SCs. Conclusions: C abuse seems to be a precursor of SCs abuse, and risk of starting SCs use could be bigger for C users, who live alone or with friends, whereas living together with a family could be preventative. Combined use of C and SCs seem to increase the risk of hepatocellular injury compared to either C or SCs alone.
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    Association of Domestic Violence Against Women With Sociodemographic Factors, Clinical Features, and Dissociative Symptoms in Patients Who Receive Services From Psychiatric Outpatient Units in Turkey
    (2020) Kotan, Zeynep; Kotan, Vahap Ozan; Yalvac, Hayriye Dilek; 29294725
    Domestic violence (DV) against women is a serious problem with its negative effects on all family members and the society. Women exposed to DV not only have physical but also psychological damage. This study investigates prevalence of DV and its relations with some descriptive and clinical features in a psychiatric outpatient population in Turkey. A total of 277 female outpatients were included in the study. After a semistructured clinical interview, they were assessed by sociodemographic data form, DV questionnaire, Hamilton Depression Rating Scale (HDRS), Hamilton Anxiety Rating Scale (HARS), Dissociative Experiences Scale (DES), and Somatoform Dissociation Questionnaire (SDQ). Prevalence of exposure to DV by intimate partner is found to be 58.8% (n= 163). The current study provided strong evidence that occupation status of the woman, education level of the partner, and family type are predictors of DV. Another predictor of DV exists where the child is battered by either parent. Prevalence of depression, conversion disorder, and other somatoform disorders are higher in women exposed to DV. These women also have higher scores from HDRS, HARS, DES, and SDQ compared with female patients who have not experienced DV (p< .001). Number of women scoring above cutoff levels for DES and SDQ were significantly higher in women exposed to DV (p< .001).
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    Quality of life and pain perception in alcohol dependence: A comparative examination of patients, their relatives, and healthy controls
    (2019) Ertek, Irem Ekmekci; Taner, Mustafa Ender; Yuksel, Rabia Nazik; Kotan, Vahap Ozan; Goka, Erol
    Objective: The aim of this study was to investigate how quality of life and the perception of pain are affected by patients with alcohol dependence and their relatives compared with healthy controls. Methods: Fifty patients with alcohol dependence, 50 first-degree relatives of patients with alcohol dependence, and 50 healthy controls were included. Participants were evaluated with a questionnaire form of sociodemographic characteristics, and the World Health Organization Quality of Life-Bref-Turkish form (WHOQOL-BREF-TR). They were then given a noxious stimulus using a transcutaneous electrical nerve stimulation (TENS) device. After that, pain threshold, pain tolerance, and visual analog scale (VAS) scores of the participants were measured. Results: Patients' quality of life was poorer than the relative and control groups. The age of first alcohol use was found to be positively associated with quality of life. Pain tolerance was found to be higher in the patients than in the controls. We found no relationship between pain perception and characteristics of addiction. Conclusions: In this study, pain tolerance was found to be higher in patients with alcohol dependence, and the characteristics of addiction did not seem to affect pain perception.