Publications by authors named "Ichiro Kusumi"

Background: The incidence of antipsychotic-induced weight gain (AIWG) is difficult to predict in real-world practice because various factors influence it. This study aimed to explore background and medication-related factors associated with weight gain in patients newly prescribed with antipsychotic medication.

Methods: This nationwide, multicenter, prospective cohort study was conducted in Japan.

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Introduction: This is a case of a 32-year-old woman who developed postpartum depression (PPD). She became anxious and depressive about caring for her child, and the Edinburgh Postnatal Depression Scale (EPDS) test showed a score of 9 at 2 weeks after delivery, and at 7 months postpartum, she presented with major melancholic depression followed by mild cognitive decline without any neurological symptoms except cluttering speech.

Case Presentation: Cerebral magnetic resonance imaging showed confluent fluid-attenuated inversion recovery hyperintensities in the periventricular and frontal deep white matter, with multiple spotty calcifications in the frontal white matter by cerebral CT.

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Aim: The association of parenting experiences in childhood with anxiety symptoms in adulthood has yet to be clarified. We hypothesized that interpersonal sensitivity (IPS) mediates the impacts of parenting experiences in childhood on anxiety symptoms and negative assessment of life events in adulthood.

Methods: An observational cross-sectional study was carried out from January 2014 to August 2014 on 853 adults.

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Aim: Hyperthymic temperament is a cheerful action orientation that is suggested to have a protective effect on depressive symptoms. We recently reported that hyperthymic temperament can positively predict activation of reward-related brain areas in anticipation of monetary rewards, which could serve as a biomarker of hyperthymic temperament. However, the relationship between hyperthymic temperament and neural responsiveness to nonmonetary rewards (i.

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Purpose: We aimed to identify factors that contribute to the discontinuation of perampanel.

Methods: We retrospectively analyzed patients with epilepsy at the Department of Psychiatry, Hokkaido University Hospital. We evaluated the factors contributing to perampanel discontinuation as primary outcomes using Cox proportional hazards regression.

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Article Synopsis
  • Lithium is the primary treatment for bipolar disorder (BD), but how it works and predicts outcomes is not fully understood.
  • A previous study identified key cellular pathways linked to lithium response, including focal adhesion and PI3K-Akt signaling.
  • In this new study, researchers confirmed these pathways in a larger group of 2039 patients but found no connection with the extracellular matrix, suggesting that issues with neuronal growth signaling may impact lithium effectiveness.
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The aim of this study was to analyze whether interpersonal sensitivity mediates the effect of qualitative parenting characteristics experienced during childhood on the appraisal of life experiences and depression severity during adulthood in adult community volunteers. A total of 404 Japanese adult volunteers answered the following four self-report questionnaires: Parental Bonding Instrument, Interpersonal Sensitivity Measure, Life Experiences Survey, and Patient Health Questionnaire-9. Structural equation modeling was performed to analyze whether childhood parenting quality increases depressive symptom severity through interpersonal sensitivity, which then affects the appraisal of recent life events.

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Antipsychotic medications increase the risk of abnormal glucose metabolism. However, in clinical practice, it is difficult to predict this risk because it is affected by medication-related and background factors. This study aimed to identify the risk factors for abnormal glucose metabolism during antipsychotic treatment.

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Lithium is the gold standard treatment for bipolar disorder (BD). However, its mechanism of action is incompletely understood, and prediction of treatment outcomes is limited. In our previous multi-omics study of the Pharmacogenomics of Bipolar Disorder (PGBD) sample combining transcriptomic and genomic data, we found that focal adhesion, the extracellular matrix (ECM), and PI3K-Akt signaling networks were associated with response to lithium.

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Background: Despite the anticipated efficacy of escitalopram in treating depression and anxiety in individuals with preexisting cardiovascular conditions, persistent concerns regarding its adverse effects have emerged. In this systematic review, we aimed to evaluate the cardiovascular safety profile of escitalopram compared with that of placebo in patients with underlying cardiovascular disease.

Methods: We used a predefined search strategy in PubMed, Cochrane Central Register of Controlled Trials, Embase, International Clinical Trials Registry Platform, and ClinicalTrials.

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Article Synopsis
  • - The study investigates the relationship between phosphorylated tau (p-tau) levels and neuropsychiatric symptoms (NPS), like depression and anxiety, in patients with Alzheimer's disease (AD) and mild cognitive impairment.
  • - A survey of 122 older patients revealed that higher p-tau accumulation was associated with lower rates of depression and apathy, especially in individuals without the APOE ε4 genetic variant.
  • - The findings suggest a negative correlation between p-tau and mood symptoms, indicating that genetics may influence this relationship, and highlight the need for further research to explore these connections over time.
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Article Synopsis
  • Loneliness and social isolation significantly worsen symptoms in patients with mental disorders, and this study focused on their impact during the COVID-19 pandemic.
  • Using data from a large online survey in Japan, researchers calculated the relationship between loneliness/isolation and chronic mental conditions, adjusting for other influences.
  • The study found that individuals with mental disorders, especially those with depression and anxiety, faced higher levels of loneliness and isolation, leading to worsened psychiatric symptoms.
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Background: Previous studies reported that the experience of maltreatment in childhood reduces subjective well-being in adulthood and that neuroticism is negatively associated with subjective well-being. However, the interrelationship between childhood maltreatment, adult life events, neuroticism, and subjective well-being has not been analyzed to date.

Methods: A total of 404 adult volunteers provided responses to the following questionnaires: 1) Childhood Abuse and Trauma Scale, 2) Life Experiences Survey, 3) Neuroticism Subscale of the Shortened Eysenck Personality Questionnaire-Revised, and 4) Subjective Well-Being Inventory.

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Article Synopsis
  • * Researchers examined 4,925 immune-related genes and their association with lithium treatment response and clinical features in a large bipolar patient sample.
  • * Findings indicate a few genetic associations with treatment response and clinical characteristics, revealing potential biomarkers, but overall support a weak connection between immune factors and bipolar disorder at a genetic level.
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Article Synopsis
  • - Patients with idiopathic generalized epilepsy (IGE) showed a higher rate of non-attendance for medical appointments compared to those with focal epilepsy (FE), with a non-attendance rate of 4.5% based on a study tracking over 9,000 appointments.
  • - Factors influencing non-attendance included being a recipient of public assistance (increased odds) and having higher education, living farther from the hospital, or attending more frequent visits (decreased odds).
  • - Among female patients with generalized epilepsy, there was a lower frequency of non-attendance, but overall, no significant differences in non-attendance were observed between IGE and juvenile myoclonic epilepsy (JME).
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Lithium is regarded as the first-line treatment for bipolar disorder (BD), a severe and disabling mental health disorder that affects about 1% of the population worldwide. Nevertheless, lithium is not consistently effective, with only 30% of patients showing a favorable response to treatment. To provide personalized treatment options for bipolar patients, it is essential to identify prediction biomarkers such as polygenic scores.

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Aim: Bipolar disorder is a leading disorder contributing to global disease burden, and bipolar depression often becomes severe and refractory. Therefore, clarifying the pathophysiology of bipolar disorder is an urgent issue. Previous reports suggested that factors, such as affective temperaments and childhood maltreatment, aggravate bipolar depression severity.

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Background: Stressful life events (SLE) impact psychosocial functioning. However, the psychological mechanism underlying the association between SLE and functional disability (FD) has not been fully elucidated. This study focused on whether depressive symptoms (DS) and subjective cognitive dysfunction (SCD) mediated the influence of SLE, comprising negative SLE (NSLE) and positive SLE (PSLE), on FD.

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Lithium is regarded as the first-line treatment for bipolar disorder (BD), a severe and disabling mental disorder that affects about 1% of the population worldwide. Nevertheless, lithium is not consistently effective, with only 30% of patients showing a favorable response to treatment. To provide personalized treatment options for bipolar patients, it is essential to identify prediction biomarkers such as polygenic scores.

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Aim: Schizophrenia is characterized by an abnormality in electroencephalography (EEG), which can be affected by antipsychotic drugs. Recently, the mechanism underlying these EEG alterations in schizophrenia patients was reframed from the perspective of redox abnormalities. The highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) can be calculated using a computational method and may be useful for evaluating the antioxidant/prooxidant effect of antipsychotic drugs.

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Depressive symptoms (DepS) associated with major depressive disorder (MDD) are influenced by affective temperaments (ATs), behavioral inhibition system (BIS), and behavioral activation system (BAS). However, the effect of interactions between ATs and BIS/BAS on DepS in MDD remains poorly understood. Herein, we aimed to investigate the effects of these interactions.

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