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Recent studies have implicated brain‐derived neurotrophic factor (BDNF) in the pathophysiology of depression and in the activities of antidepressant drugs. Serum BDNF levels are lower in depressed patients and increase in response to antidepressant medications; however, no studies have examined the association between plasma concentrations of antidepressant(More)
AIMS In an Asian population, the criteria for metabolic syndrome (MetS) are different from those for Western populations. The aim of this study was to assess the MetS prevalence among patients with schizophrenia or schizoaffective disorder in Japan. METHODS We recruited patients (n=1186), aged 54.8±14.8 (mean±SD) years old with the DSM-IV diagnosis of(More)
BACKGROUND It has been reported that the onset of schizophrenia and the physical complications after its onset are related to diet. Diet has been considered as a variable factor of the pathogenesis of schizophrenia. However, the results of studies on this relationship have been inconsistent. Nutrients are consumed as a mixture in the diet. It is difficult(More)
Hyperprolactinemia is a frequent consequence of treatment with antipsychotic agents, partially because the prolactin response to antipsychotics is related to dopamine blockade. Recent studies have suggested that the prolactin response to olanzapine is weaker than that to risperidone. Thus, we studied the effects of various factors on the elevated plasma(More)
The aim of the present study was to investigate whether there is an association between the (TCAT)(n) repeat polymorphism in the tyrosine hydroxylase (TH) gene and personality. The (TCAT)(n) repeat polymorphism in the TH gene was genotyped in 898 healthy Japanese subjects. Personality traits were evaluated using the Temperament and Character Inventory(More)
Polymorphic enzyme cytochrome P450 (CYP) 2C19 is expressed not only in the liver but also in the brain and mediates the biotransformation of 5-hydroxytriptamine (5-HT). We investigated possible association between genetic polymorphism of CYP2C19 and individual personality traits, possibly influenced by neurotransmitters. Mentally and physically healthy(More)
OBJECTIVE There are few data concerning a clear relationship between the clinical effect of paroxetine and plasma drug concentrations, although therapeutic ranges have been established for some tricyclic antidepressants. METHODS In this study, 120 patients with major depressive disorders were treated with 10-40 mg/day of paroxetine for 6 weeks, and a(More)
OBJECTIVE Decreased bone mineral density has been implicated in schizophrenic patients for long years. The purpose of this study was to assess the relationship between bone mass and prolactin levels in schizophrenic patients. METHODS In this study, bone mass was measured using quantitative ultrasound densitometry of the calcaneus in 114 patients (49 males(More)
Hyperprolactinemia is an inevitable consequence of treatment with antipsychotic agents to some extent because prolactin response to antipsychotics is related to dopamine blockade. Recent studies have suggested that polymorphisms of the dopamine receptors are associated with therapeutic response to antipsychotics. Thus, we studied the effects of major(More)
Smoking prevalence for schizophrenic patients is higher than for the general population. Inter-individual variability in hyperprolactinemia induced antipsychotics particularly risperidone can be explained by smoking status to some extent. We therefore studied the effects of smoking status on the plasma concentration of prolactin. Subjects included 154(More)