Browsing by Author "Kaplan, Ibrahim"

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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.
Antioxidant Status and Dna Damage in Children With Attention Deficit Hyperactivity Disorder With or Without Comorbid Disruptive Behavioral Disorders
(Kure Iletisim Grubu A S, 2016) Simsek, Seref; Gencoglan, Salih; Ozaner, Soner; Kaplan, Ibrahim; Kaya, Mehmet Cemal
Objective: The aim of this study is to investigate oxidative stress and DNA damage among children with attention deficit hyperactivity disorder (ADHD) with or without disruptive behavioral disorders (DBD). Methods: A total of 49 treatment naive children (M/F: 40/9) who were diagnosed with ADHD according to the Diagnostic and Statistical Manual of Mental Disorders (DSM) IV criteria were included. The patients with ADHD were divided into two groups, those with ADHD alone (n= 25) and ADHD plus DBD (n= 24). The control group consisted of 40 age-and sex-similar healthy children. The Schedule for Affective Disorders and Schizophrenia for School Aged Children-Present and Life-time version (K-SADS-PL) was applied to all children. Children's teachers completed the Turgay DSM-IV Based Child and Adolescent Behavior Disorders Screening and Rating Scale (T-DSM-IV-S). Serum glutathione peroxidase (GPx), coenzyme Q, 8-hydroxy-2-deoxyguanosine (8-OHdG) and superoxide dismutase (SOD) levels were measured by the ELISA method using commercial kits. Results: There were no significant differences in serum GPx, SOD, CoQ and 8-OHdG levels among the pure ADHD, ADHD plus DBD and the control groups (p>0.05). No statistically significant correlations were found between the severity of ADHD symptoms and GPx, SOD, CoQ and 8-OHdG levels. Conclusion: Our study suggests that oxidative stress may not play a key role in the pathogenesis of pure ADHD and ADHD plus DBD.
Cortisol and Brain-Derived Neurotrophic Factor Levels Prior To Treatment in Children With Obsessive-Compulsive Disorder
(Physicians Postgraduate Press, 2016) Simsek, Seref; Gencoglan, Salih; Yuksel, Tugba; Kaplan, Ibrahim; Alaca, Rumeysa
Objective: In this study, we investigated serum brain-derived neurotrophic factor (BDNF), adrenocorticotropic hormone (ACTH), and cortisol levels between children with obsessive-compulsive disorder (OCD) prior to treatment and healthy controls. In addition, the study aimed to assess any correlations between OCD symptom severity and BDNF, ACTH, and cortisol levels. Methods: Twenty-nine children, aged from 7 to 17 years (male/female: 21/8) and diagnosed with OCD according to DSM-IV prior to treatment, were compared with 25 healthy control subjects (male/female: 16/9). The study was conducted between December 2012 and December 2013. The Kiddie Schedule for Affective Disorders and Schizophrenia, Present and Lifetime Version (K-SADS-PL), Children's Yale-Brown Obsessive Compulsive Scale, and Children's Depression Inventory (CDI) were administered to the children. BDNF, ACTH, and cortisol levels were detected using a prepared kit with the enzyme-linked immunosorbent assay method. Results: BDNF, ACTH, and cortisol levels in the OCD group were significantly higher when compared with the control group (P=.02, P=.03, and P=.046, respectively). No association was detected between the severity and duration of OCD symptoms and BDNF, ACTH, and cortisol levels. CDI scores in both groups were similar. The mean (SD) duration of OCD symptoms was 17.9 (18.5) months. Conclusions: Our findings suggest that BDNF levels adaptively increase as a result of the damaging effects of the hypothalamic-pituitary-adrenal (HPA) axis hyperactivity on brain tissue in the early stages of OCD. HPA axis abnormalities and BDNF may play a role in the pathogenesis of the disease. (C) Copyright 2016 Physicians Postgraduate Press, Inc.
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.
Evaluation of the Relationship Between Brain-Derived Neurotropic Factor Levels and the Stroop Interference Effect in Children With Attention-Deficit Hyperactivity Disorder
(Aves, 2016) Simsek, Seref; Gencoglan, Salih; Yuksel, Tugba; Kaplan, Ibrahim; Aktas, Huseyin; Alaca, Rumeysa
Introduction: Brain-derived neurotropic factor (BDNF) has been suggested to play a role in the pathogenesis of attention-deficit hyperactivity disorder (ADHD). In addition, impairment in executive functions has been reported in children with ADHD. This study investigated the presence of a relationship between Stroop test scores and BDNF levels in children with ADHD. Methods: The study was conducted in the Department of Child Psychiatry at Dicle University. The study included 49 children between 6 and 15 years of age (M/F: 42/7), who were diagnosed with ADHD according to DSM-IV, and who did not receive previous therapy. Similar in terms of age and gender to the ADHD group, 40 children were selected in the control group. The Kiddie Schedule for Affective Disorders and Schizophrenia, Present and Lifetime version was administered to all participants. Parents and teachers were administered Turgay DSM-IV-based Child and Adolescent Behavior Disorders Screening and Rating Scale to measure symptom severity in children with ADHD. Children with ADHD underwent the Stroop test. BDNF levels were evaluated in serum by ELISA. Results: The ADHD and control groups did not differ in terms of BDNF levels. BDNF levels did not differ between ADHD subtypes. There was also no relationship between the Stroop test interference scores and BDNF levels. Conclusion: The findings of the present study are in line with those in studies that demonstrated no significant role of BDNF in the pathogenesis of ADHD.
Lower Brain-Derived Neurotropic Factor Levels in Untreated Adolescents With First-Episode Psychosis
(Lippincott Williams & Wilkins, 2015) Simsek, Seref; Gencoglan, Salih; Yuksel, Tugba; Kaplan, Ibrahim; Aktas, Huseyin
Objective Brain-derived neurotropic factor (BDNF) is known to play a role in the pathogenesis of schizophrenia. However, the relationship between early onset schizophrenia and BDNF has not been extensively studied. The aim of the study was to compare the levels of BDNF between adolescent patients with first-episode psychosis (FEP) and the healthy control subjects. Method The study was conducted in the Department of Child Psychiatry at Dicle University. A total of 26 adolescent patients aged between 11 and 17 years who had not received previous therapy and whose conditions were diagnosed with psychosis according to the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, and 26 age- and sex-matched healthy adolescent control subjects were included. Kiddie Schedule for Affective Disorders and Schizophrenia, Present and Lifetime version, and the Positive and Negative Symptom Scale were conducted with all participants. The clinical global impression was used to evaluate disease severity. The BDNF levels were measured in the serum by enzyme-linked immunosorbent assay method. Results The mean (SD) age was 14.6 (1.6) years in both FEP group (male/female, 11/15) and the control group (P > 0.05). The FEP group had significantly lower serum BDNF levels (2.0 1.9 ng/mL) compared with the control group (3.4 +/- 3.0 ng/mL, P = 0.03). There was no significant relationship between BDNF concentration and the Positive and Negative Symptom Scale (positive and negative scores) scores (r = -0.14, P = 0.74 and r = 0.49, P = 0.22, respectively). There was no significant relationship between the duration of untreated psychosis and serum BDNF levels (r = -0.22, P = 0.32). Conclusions High incidence of schizophrenia in patients with FEP suggests a relationship between BDNF levels and the pathogenesis of schizophrenia. We suggest that BDNF may be a useful neurobiological marker of early onset schizophrenia.
Oxidative Stress and Dna Damage in Untreated First-Episode Psychosis in Adolescents
(Karger, 2016) Simsek, Seref; Gencoglan, Salih; Yuksel, Tugba; Kaplan, Ibrahim; Alaca, Rumeysa; Aktas, Huseyin
Objective: Oxidative stress has been reported to play a role in the psychopathology of schizophrenia, though only a few studies have investigated the relationship between early onset schizophrenia and oxidative stress. The aim of the present study is to evaluate the level of oxidative stress and the presence of DNA damage in first-episode psychosis (FEP) in adolescents. Methods: This study was conducted in the Department of Child Psychiatry of the Dicle University Hospital. It included 20 adolescent patients (age 11-17 years) with psychosis (acute psychosis, schizophreniform disorder, or schizophrenia) according to DSM-IV criteria who had received no previous psychiatric therapy (patient group) and 20 age/gender-matched healthy adolescents (control group). Structured psychiatric interviews [Kiddie Schedule for Affective Disorders and Schizophrenia, Present and Lifetime Version (K-SADS-PL) and Positive and Negative Symptom Scale (PANSS)] were conducted on the patients, and the Clinical Global Impressions (CGI) scale was used to evaluate the severity of disease. Glutathione peroxidase (GPx), superoxide dismutase (SOD), coenzyme Q (CoQ), and 8-hydroxy-2-deoxyguanosine (8-OHdG) levels were determined using the ELISA method and commercial ELISA kits. Results: The mean age was 14.5 +/- 1.6 years in the FEP group (male-to-female ratio: 8/12) and 14.4 +/- 1.5 years in the control group (male-to-female ratio: 8/12). There were no differences between the patient and control groups in terms of SOD, GPx, or 8-OHdG values (p > 0.05). Conclusions: This study on DNA damage and oxidative stress in FEP in adolescents had a small sample size, and our data suggest that oxidative stress is associated with a chronic disease course rather than being an early sign of early-onset schizophrenia. (C) 2016 S. Karger AG, Basel
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.