Browsing by Author "Bez, Yasin"

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Altered Lipid Peroxidation Markers Are Related To Post-Traumatic Stress Disorder (Ptsd) and Not Trauma Itself in Earthquake Survivors
(Springer Heidelberg, 2016) Atli, Abdullah; Bulut, Mahmut; Bez, Yasin; Kaplan, Ibrahim; Ozdemir, Pinar Guzel; Uysal, Cem; Sir, Aytekin
The traumatic life events, including earthquakes, war, and interpersonal conflicts, cause a cascade of psychological and biological changes known as post-traumatic stress disorder (PTSD). Malondialdehyde (MDA) is a reliable marker of lipid peroxidation, and paraoxonase is a known antioxidant enzyme. The aims of this study were to investigate the relationship between earthquake trauma, PTSD effects on oxidative stress and the levels of serum paraoxonase 1 (PON1) enzyme activity, and levels of serum MDA. The study was carried out on three groups called: the PTSD group, the traumatized with earthquake exercise group, and healthy control group, which contained 32, 31, and 38 individuals, respectively. Serum MDA levels and PON1 enzyme activities from all participants were measured, and the results were compared across all groups. There were no significant differences between the PTSD patients and non-PTSD earthquake survivors in terms of the study variables. The mean PON1 enzyme activity from PTSD patients was significantly lower, while the mean MDA level was significantly higher than that of the healthy control group (p < 0.01 for both measurements). Similarly, earthquake survivors who did not develop PTSD showed higher MDA levels and lower PON1 activity when compared to healthy controls. However, the differences between these groups did not reach a statistically significant level. Increased MDA level and decreased PON1 activity measured in PTSD patients after earthquake and may suggest increased oxidative stress in these patients. The nonsignificant trends that are observed in lipid peroxidation markers of earthquake survivors may indicate higher impact of PTSD development on these markers than trauma itself. For example, PTSD diagnosis seems to add to the effect of trauma on serum MDA levels and PON1 enzyme activity. Thus, serum MDA levels and PON1 enzyme activity may serve as biochemical markers of PTSD diagnosis.
Decreased Prolidase Activity in Patients With Posttraumatic Stress Disorder
(Korean Neuropsychiatric Assoc, 2016) Demir, Suleyman; Bulut, Mahmut; Atli, Abdullah; Kaplan, Ibrahim; Kaya, Mehmet Cemal; Bez, Yasin; Sir, Aytekin
Objective Many neurochemical systems have been implicated in the development of Posttraumatic Stress Disorder (PTSD). The prolidase enzyme is a cytosolic exopeptidase that detaches proline or hydroxyproline from the carboxyl terminal position of dipeptides. Prolidase has important biological effects, and to date, its role in the etiology of PTSD has not been studied. In the present study, we aimed to evaluate prolidase activity in patients with PTSD. Methods The study group consisted of patients who were diagnosed with PTSD after the earthquake that occurred in the province of Van in Turkey in 2011 (n=25); the first control group consisted of patients who experienced the earthquake but did not show PTSD symptoms (n=26) and the second control group consisted of patients who have never been exposed to a traumatic event (n=25). Prolidase activities in the patients and the control groups were determined by the ELISA method using commercial kits. Results Prolidase activity in the patient group was significantly lower when compared to the control groups. Prolidase activity was also significantly lower in the traumatized healthy subjects compared to the other healthy group (p<0.01). Conclusion The findings of the present study suggest that the decrease in prolidase activity may have neuroprotective effects in patients with PTSD.
Latent Class Analysis of Obsessive-Compulsive Symptoms in a Clinical Sample
(W B Saunders Co-elsevier inc, 2014) Atli, Abdullah; Boysan, Murat; Cetinkaya, Nuralay; Bulut, Mahmut; Bez, Yasin
Objective: Obsessive compulsive disorder (OCD) is probably a heterogeneous condition. To date, research investigating the symptom structure of OCD has generally focused on variable-classification approaches, primarily factor analysis. Our aim was to use the latent class analysis, an advanced individual-classification method, in order to define homogeneous sub-groups based on the Yale Brown Obsessive Compulsive Scale Check List (Y-BOCS CL) assessments within 193 outpatients with OCD. Method: Latent class analysis of 13 obsessive compulsive symptom-clusters measured by the Yale Brown Obsessive Compulsive Scale Check List was performed. Associations of demographic and clinical features with latent class membership were tested by using logistic regression models. Differences in severity of obsessive compulsive symptoms, obsessive beliefs; and depressive symptomotology between latent classes were evaluated with the chi-square likelihood test. Results: Latent class analysis models of best fit yielded 3 latent classes: "autogenous obsessions", "reactive obsessive compulsive", and "reactive obsessions". Outpatients in reactive obsessive compulsive group reported significantly higher scores on the Y-BOCS global, obsessions, and compulsions scales than outpatients in other two sub-groups. Participants in reactive obsessive compulsive group were predominantly female, single, and had a history of family psychopathology; whereas autogenous and reactive obsessions groups were predominantly male. There were no differences in severity of depression and obsessive belief domains. Conclusions: The results provide support for the validity of autogenous/reactive distinction for OCD. These three classes may have important implications for research and clinical purposes. (C) 2014 Elsevier Inc. All rights reserved.
Serum Total Oxidant and Antioxidant Status in Earthquake Survivors With Post-Traumatic Stress Disorder
(Cambridge Univ Press, 2015) Ozdemir, Pinar Guzel; Kaplan, Ibrahim; Uysal, Cem; Bulut, Mahmut; Atli, Abdullah; Bez, Yasin; Ozdemir, Osman
Objective Oxidative stress has been shown to play an important role in the pathogenesis of post-traumatic stress disorder (PTSD). Although there are some studies on oxidative stress and PTSD, there is no report available on the serum total oxidant and antioxidant status in earthquake survivors with PTSD. Therefore, this study aimed to investigate the serum total oxidant and antioxidant status in earthquake survivors with chronic PTSD. Material and Methods The study group included 45 earthquake survivors with PTSD and 40 earthquake survivors without PTSD. The oxidative status was determined using the total antioxidant status and total oxidant status (TOS) measurements and by calculating the oxidative stress index (OSI). Results There were no statistically significant differences in the total antioxidant status, TOS, or OSI when comparing individuals with and without PTSD (all, p>0.05). There were no correlations between Clinician-Administered PTSD Scale scores and oxidant and antioxidant stress markers (all, p>0.05). Conclusions Our results suggest that the total oxidant and antioxidant status may not affect earthquake survivors with PTSD. This is the first study to evaluate the oxidative status in earthquake survivors with PTSD. Further studies are necessary to confirm these findings.