The monoaminergic hypothesis of depression has provided the basis for extensive research into the... more The monoaminergic hypothesis of depression has provided the basis for extensive research into the pathophysiology of mood disorders and has been of great significance for the development of effective antidepressants. Current antidepressant treatments not only increase ...
Turk Psikiyatri Dergisi Turkish Journal of Psychiatry, 2005
To compare the efficacy, safety and tolerability of reboxetine and sertraline in major depressive... more To compare the efficacy, safety and tolerability of reboxetine and sertraline in major depressive disorder (MDD). The study subjects consisted of 41 patients who met the DSM-IV MDD diagnostic criteria. Patients were randomly assigned to receive either reboxetine or sertraline. During the study the patients were assessed 6 times (baseline visit=day 0, visit 1=day 8, visit 2=day 22, visit 3=day 36, visit 4=day 57 and visit 5=day 78) over 11 weeks. Antidepressant response was measured by the Hamilton Depression Rating Scale (HDRS), Clinical Global Impressions-Severity of Illness (CGI-SI) and Global Impressions-Global Improvement (CGI-GI). Comparing the two groups in terms of response and remission (HAM-D< or =10) measures, the results were in favour of the reboxetine group at visits 2, 3 and 4. At visit 5, the scores were similar and no statistically significant difference was found between the two groups. However, when remission was evaluated as HAM-D< or =7, a significant statistical difference was found in favour of the reboxetine group. Evaluating the side effects, dry mouth, sweating, palpitation, headache, hot flushing and sedation were more frequent in the reboxetine group. Only one patient, in the reboxetine group, dropped out due to a side effect (constipation). Higher rates of full remission achievement, which is the main target of MDD treatment, in the reboxetine group compared with the sertraline group may be due to the suppression of anxiety symptoms by the noradrenergic feature of the drug. In order to understand the role of the noradrenergic system in treating MDD, larger patient samples are needed. Both reboxetine and sertraline were well tolerated and effective in treating MDD.
In the present study, our aim was to investigate the oxidative-antioxidative systems in unmedicat... more In the present study, our aim was to investigate the oxidative-antioxidative systems in unmedicated first-episode psychosis (FEP) patients at the beginning and after short-term treatment. This study consisted of 29 patients who experienced an FEP and 25 control subjects. In order to investigate the oxidative status, we determined plasma malondialdehyde (MDA) levels, oxidizability of red blood cells, oxidation and oxidizability of apolipoprotein B-containing lipoproteins (apo B-basal MDA and apo B-ΔMDA). In order to evaluate the antioxidative defense, we measured serum total antioxidative capacity, uric acid, albumin, total bilirubin and vitamin E levels and serum paraoxonase/arylesterase, whole blood glutathione peroxidase (GPx) and red blood cell superoxide dismutase activities before and after 6 weeks of treatment in patients with FEP. Plasma MDA and apo B-basal MDA levels and red blood cell superoxide dismutase activity were significantly higher and serum arylesterase and whole blood-GPx activities were lower in the FEP group than those of the healthy control group. There were not any significant changes in the oxidative and antioxidative system parameters (except increased vitamin E levels) after treatment. The results of this study suggest that FEP is accompanied by oxidative stress. However, further studies are needed to clarify the role of oxidative stress in the physiopathologic mechanisms of FEP, so that oxidative and antioxidative system parameters can be used in the management of these patients. In accordance with psychiatric evaluation, for a better management, patients with FEP may require a multidisciplinary approach, including oxidative and antioxidative system parameters.
Psikiyatride Guncel Yaklasimlar - Current Approaches in Psychiatry, 2011
Abstract: Suicide is one of the major causes of premature death among patients with schizophrenia... more Abstract: Suicide is one of the major causes of premature death among patients with schizophrenia. Follow-up studies have estimated that 4-5% of these patients die by suicide. Reducing the high rates of suicide in schizophrenia is possible with understanding of ...
The aim of the current study is to determine whether serum levels of brain-derived neurotrophic f... more The aim of the current study is to determine whether serum levels of brain-derived neurotrophic factor (BDNF) and interleukin-2 (IL-2) can be biological indicators for the diagnosis of schizophrenia in patients with depressive symptoms. Forty-seven patients (11 patients diagnosed with schizophrenia, 16 patients diagnosed with schizophrenia and comorbid depression and 20 patients diagnosed with major depressive disorder) and 20 healthy subjects were enrolled. The Positive and Negative Symptoms Scale, the Calgary Depression Scale for Schizophrenia and the Hamilton Depression Rating Scale were used for assessment. The serum BDNF and IL-2 levels of all the subjects were studied. Decreased levels of serum BDNF and increased levels of serum IL-2 were found in the patients diagnosed with either schizophrenia, schizophrenia with depression, or major depressive disorder (p = 0.049, p = 0.010; p = 0.001 and p = 0.044; p = 0.027, p = 0.003; respectively) compared with control group. There were no significant differences between the patient groups in their serum BDNF and IL-2 levels. The present study suggests that neurotrophic factors and immune system changes are involved in the pathogenesis of schizophrenia with or without depressive symptomatology. However, the data do not clarify whether depressive symptoms in schizophrenia occur as a dimension of schizophrenia or as symptoms of major depression that is comorbid with schizophrenia.
QTc interval prolongation may appear as a consequence of both typical and atypical antipsychotic ... more QTc interval prolongation may appear as a consequence of both typical and atypical antipsychotic treatments. Ziprasidone, which is effective in treating schizophrenia, is associated with QTc prolongation. Although the prolongation of QTc with ziprasidone treatment is often pronounced, there is a scarce number of cases reported about the relationship between ziprasidone and QTc prolongation. Of the three cases presented in this case series, two cases showed values exceeding 0.50 s with ziprasidone treatment.
The monoaminergic hypothesis of depression has provided the basis for extensive research into the... more The monoaminergic hypothesis of depression has provided the basis for extensive research into the pathophysiology of mood disorders and has been of great significance for the development of effective antidepressants. Current antidepressant treatments not only increase ...
Turk Psikiyatri Dergisi Turkish Journal of Psychiatry, 2005
To compare the efficacy, safety and tolerability of reboxetine and sertraline in major depressive... more To compare the efficacy, safety and tolerability of reboxetine and sertraline in major depressive disorder (MDD). The study subjects consisted of 41 patients who met the DSM-IV MDD diagnostic criteria. Patients were randomly assigned to receive either reboxetine or sertraline. During the study the patients were assessed 6 times (baseline visit=day 0, visit 1=day 8, visit 2=day 22, visit 3=day 36, visit 4=day 57 and visit 5=day 78) over 11 weeks. Antidepressant response was measured by the Hamilton Depression Rating Scale (HDRS), Clinical Global Impressions-Severity of Illness (CGI-SI) and Global Impressions-Global Improvement (CGI-GI). Comparing the two groups in terms of response and remission (HAM-D< or =10) measures, the results were in favour of the reboxetine group at visits 2, 3 and 4. At visit 5, the scores were similar and no statistically significant difference was found between the two groups. However, when remission was evaluated as HAM-D< or =7, a significant statistical difference was found in favour of the reboxetine group. Evaluating the side effects, dry mouth, sweating, palpitation, headache, hot flushing and sedation were more frequent in the reboxetine group. Only one patient, in the reboxetine group, dropped out due to a side effect (constipation). Higher rates of full remission achievement, which is the main target of MDD treatment, in the reboxetine group compared with the sertraline group may be due to the suppression of anxiety symptoms by the noradrenergic feature of the drug. In order to understand the role of the noradrenergic system in treating MDD, larger patient samples are needed. Both reboxetine and sertraline were well tolerated and effective in treating MDD.
In the present study, our aim was to investigate the oxidative-antioxidative systems in unmedicat... more In the present study, our aim was to investigate the oxidative-antioxidative systems in unmedicated first-episode psychosis (FEP) patients at the beginning and after short-term treatment. This study consisted of 29 patients who experienced an FEP and 25 control subjects. In order to investigate the oxidative status, we determined plasma malondialdehyde (MDA) levels, oxidizability of red blood cells, oxidation and oxidizability of apolipoprotein B-containing lipoproteins (apo B-basal MDA and apo B-ΔMDA). In order to evaluate the antioxidative defense, we measured serum total antioxidative capacity, uric acid, albumin, total bilirubin and vitamin E levels and serum paraoxonase/arylesterase, whole blood glutathione peroxidase (GPx) and red blood cell superoxide dismutase activities before and after 6 weeks of treatment in patients with FEP. Plasma MDA and apo B-basal MDA levels and red blood cell superoxide dismutase activity were significantly higher and serum arylesterase and whole blood-GPx activities were lower in the FEP group than those of the healthy control group. There were not any significant changes in the oxidative and antioxidative system parameters (except increased vitamin E levels) after treatment. The results of this study suggest that FEP is accompanied by oxidative stress. However, further studies are needed to clarify the role of oxidative stress in the physiopathologic mechanisms of FEP, so that oxidative and antioxidative system parameters can be used in the management of these patients. In accordance with psychiatric evaluation, for a better management, patients with FEP may require a multidisciplinary approach, including oxidative and antioxidative system parameters.
Psikiyatride Guncel Yaklasimlar - Current Approaches in Psychiatry, 2011
Abstract: Suicide is one of the major causes of premature death among patients with schizophrenia... more Abstract: Suicide is one of the major causes of premature death among patients with schizophrenia. Follow-up studies have estimated that 4-5% of these patients die by suicide. Reducing the high rates of suicide in schizophrenia is possible with understanding of ...
The aim of the current study is to determine whether serum levels of brain-derived neurotrophic f... more The aim of the current study is to determine whether serum levels of brain-derived neurotrophic factor (BDNF) and interleukin-2 (IL-2) can be biological indicators for the diagnosis of schizophrenia in patients with depressive symptoms. Forty-seven patients (11 patients diagnosed with schizophrenia, 16 patients diagnosed with schizophrenia and comorbid depression and 20 patients diagnosed with major depressive disorder) and 20 healthy subjects were enrolled. The Positive and Negative Symptoms Scale, the Calgary Depression Scale for Schizophrenia and the Hamilton Depression Rating Scale were used for assessment. The serum BDNF and IL-2 levels of all the subjects were studied. Decreased levels of serum BDNF and increased levels of serum IL-2 were found in the patients diagnosed with either schizophrenia, schizophrenia with depression, or major depressive disorder (p = 0.049, p = 0.010; p = 0.001 and p = 0.044; p = 0.027, p = 0.003; respectively) compared with control group. There were no significant differences between the patient groups in their serum BDNF and IL-2 levels. The present study suggests that neurotrophic factors and immune system changes are involved in the pathogenesis of schizophrenia with or without depressive symptomatology. However, the data do not clarify whether depressive symptoms in schizophrenia occur as a dimension of schizophrenia or as symptoms of major depression that is comorbid with schizophrenia.
QTc interval prolongation may appear as a consequence of both typical and atypical antipsychotic ... more QTc interval prolongation may appear as a consequence of both typical and atypical antipsychotic treatments. Ziprasidone, which is effective in treating schizophrenia, is associated with QTc prolongation. Although the prolongation of QTc with ziprasidone treatment is often pronounced, there is a scarce number of cases reported about the relationship between ziprasidone and QTc prolongation. Of the three cases presented in this case series, two cases showed values exceeding 0.50 s with ziprasidone treatment.
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