Publications by authors named "Shioiri T"

Purpose: Investigating the status and challenges associated with radiological technologists acting as assistants during angiography and interventional radiology (IVR) through task shift/share.

Methods: The survey period was from August 1, 2023 to September 30, 2023. A 10-item questionnaire survey was conducted nationwide, targeting 676 hospitals equipped with angiography facilities.

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  • - The study investigates the link between rare copy number variations (CNVs) in synaptic genes and bipolar disorder (BD) in a Japanese population, using genome hybridization techniques on nearly 2,000 BD patients and 2,760 controls.
  • - Results indicate a strong association between the RNF216 gene and BD, with significant findings also related to postsynaptic membrane components, suggesting these genetic factors contribute to BD risk.
  • - The findings enhance understanding of BD's genetic underpinnings, highlighting the importance of CNVs in gene regions that may influence the disorder's development.
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Leptin, a hormone mainly secreted by adipocytes, has attracted significant attention since its discovery in 1994. Initially known for its role in appetite suppression and energy regulation, leptin is now recognized for its influence on various physiological processes, including immune response, bone formation, and reproduction. It exerts its effects by binding to receptors and initiating an intracellular signaling cascade.

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  • The study explores how dietary habits may influence the prevention and management of schizophrenia (SCZ) and bipolar disorder (BD) in older adults, particularly in relation to genetic predispositions and lifestyle-related diseases.
  • A cohort of 730 older patients was assessed for their dietary habits across various food categories while calculating polygenic risk scores (PRSs) for SCZ and BD based on large-scale genetic studies.
  • Findings indicated that higher genetic risk for SCZ and BD is correlated with lower consumption of nutrient-rich foods like light-colored vegetables and soybeans, with notable differences in dietary impacts between types of BD, especially BD I.
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  • * Patients with schizophrenia or delusional disorder, especially older women, are at a higher risk for developing Alzheimer's, while a significant percentage of Alzheimer's patients experience psychotic symptoms that can worsen their condition.
  • * The review highlights weak genetic correlations between schizophrenia and Alzheimer's, pointing out inconsistencies in polygenic risk scores, and underscores the need for further research into their genetic links and impacts on treatment and prevention strategies.
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Context: Failure of students to pass the National Medical Licensure Examination (NMLE) is a major problem for universities and the health system in Japan. To assist students at risk for NMLE failure as early as possible after admission, this study investigated the time points (from the time of admission to graduation) at which predictive pass rate (PPR) can be used to identify students at risk of failing the NMLE.

Methods: Seven consecutive cohorts of medical students between 2012 and 2018 (n = 637) at the Gifu University Graduate School of Medicine were investigated.

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  • Schizophrenia (SCZ) has shared genetic factors with autism spectrum disorder (ASD) and attention-deficit hyperactivity disorder (ADHD), leading researchers to investigate these links further.
  • A genome-wide association study (GWAS) evaluated how polygenic risk scores (PRSs) for ADHD and ASD correlate with cognitive and brain structure differences in SCZ patients.
  • The findings showed that a higher risk for ADHD was linked to worse working memory and reduced cortical thickness in specific brain areas, while a lower risk for ASD was associated with decreased surface areas in several regions of the brain among SCZ patients.
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  • The 40-Hz auditory steady-state response (ASSR) is affected by factors like attention, stimulus type, duration, and inter-stimulus interval (ISI) in patients with schizophrenia.
  • In a meta-analysis of 33 studies, it was found that spectral power and phase-locking of the ASSR were lower in schizophrenia patients, with ISI playing a significant role in the differences observed compared to healthy controls.
  • A new hypothesis suggests that the ability to detect novelty based on stimulus duration and ISI is crucial in explaining why patients show less variation in their ASSR, indicating a need for further research to validate the 40-Hz ASSR as a schizophrenia biomarker.
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Chondroitin sulfate (CS) is a linear polysaccharide chain of alternating residues of glucuronic acid (GlcA) and N-acetylgalactosamine (GalNAc), modified with sulfate groups. Based on the structure, CS chains bind to bioactive molecules specifically and regulate their functions. For example, CS whose GalNAc is sulfated at the C4 position, termed CSA, and CS whose GalNAc is sulfated at both C4 and C6 positions, termed CSE, bind to a malaria protein VAR2CSA and receptor type of protein tyrosine phosphatase sigma (RPTPσ), respectively, in a specific manner.

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Social anxiety disorder (SAD) and panic disorder (PD) are prevalent anxiety disorders characterized by a complex interplay of genetic and environmental factors. Both disorders share overlapping features and often coexist, despite displaying distinct characteristics. Childhood life adversity, overall stressful life events, and genetic factors contribute to the development of these disorders.

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Major depressive disorder (MDD) is a clinically and genetically heterogeneous disorder. To reduce heterogeneity, large-scale genome-wide association studies have recently identified genome-wide significant loci associated with seven MDD subtypes. However, it was unclear in which tissues the genes near those loci are specifically expressed.

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Objective: Panic disorder is a modestly heritable condition. Currently, diagnosis is based only on clinical symptoms; identifying objective biomarkers and a more reliable diagnostic procedure is desirable. We investigated whether people with panic disorder can be reliably diagnosed utilizing combinations of multiple polygenic scores for psychiatric disorders and their intermediate phenotypes, compared with single polygenic score approaches, by applying specific machine learning techniques.

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The epoxidation of olefins by substituting "air" for potentially harmful oxidants was achieved using an oxidation method that integrated a fluorous iron(III) salen catalyst derived from common metals and pivalaldehyde. Several aromatic disubstituted olefins were converted into their corresponding epoxides with high efficiency and quantitative yields. This reaction represents an environmentally friendly oxidation process that utilizes an abundant source of air and employs a readily available metal, iron, in the form of salen complexes, making it an environmentally conscious oxidation reaction.

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  • Genetic factors, particularly Polygenic Risk Scores (PRSs), influence the likelihood of developing schizophrenia (SZ) and bipolar disorder (BD), with findings showing that SZ risk groups exhibit significant cognitive impairments.
  • Epigenome-wide association studies (EWASs) revealed numerous differentially methylated positions (DMPs) related to SZ in blood samples, highlighting a stark contrast between genetic SZ risk patients and those with lower genetic risks.
  • DNA Methylation Risk Scores (MRSs) for SZ were notably higher in SZ patients compared to healthy controls, especially among those with elevated genetic SZ risk, suggesting a potential epigenetic link to the disorder's pathogenesis.
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  • Adjustment disorder has three subtypes: with depressed mood, with anxiety, and with disturbance of conduct, and it shows moderate heritability.
  • There are strong genetic correlations between adjustment disorder and major depressive disorder (MDD), anxiety disorders, and risk-tolerant personality, suggesting they may share similar genetic risks.
  • While adjustment disorder is positively linked to an array of psychiatric conditions like schizophrenia and bipolar disorder, it shows no significant correlation with obsessive-compulsive disorder or Tourette syndrome, despite other related disorders exhibiting such correlations.
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  • The study investigates the role of mitochondrial genetic variants in the development of bipolar disorder (BD), schizophrenia (SZ), and psychotic disorders (PSY) in a Japanese population, highlighting that previous research primarily focused on individuals of European ancestry.
  • Using quality control methods, researchers analyzed 45 genetic variants in 420 participants (BD patients, SZ patients, and healthy controls) to identify associations with the disorders.
  • Four specific variants showed significant associations with BD and PSY, particularly the rs200044200 variant, which was found only in BD patients, suggesting mitochondrial dysfunction may play a role in the pathogenesis of these disorders.
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  • Schizophrenia patients showed significantly poorer olfactory identification skills compared to both their first-degree relatives and healthy controls.
  • First-degree relatives exhibited intermediate olfactory identification abilities, suggesting they may have some level of impairment compared to healthy individuals.
  • The study found that olfactory identification correlated negatively with the duration of illness and the severity of negative symptoms in schizophrenia patients.
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  • Patients with schizophrenia (SZ) show moderate reductions in brainstem volumes, particularly in structures like the pons, compared to healthy controls.
  • A study involving MRI scans of 156 SZ patients and 205 healthy individuals revealed significantly smaller pons volumes in male SZ patients, correlated with lower education levels.
  • The research suggests that the reduction in pons volume in these male patients may occur before or around the onset of schizophrenia, rather than being a result of the illness itself.
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The 40-Hz auditory steady-state response (ASSR) has received special attention as an index of gamma oscillations owing to its association with various neuropsychiatric disorders including schizophrenia. When a periodic stimulus is presented, oscillatory responses are often elicited not only at the stimulus frequency, but also at its harmonic frequencies. However, little is known about the effect of 40-Hz subharmonic stimuli on the activity of the 40-Hz ASSR.

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  • Hypersalivation linked to clozapine is a common issue for patients with treatment-resistant schizophrenia, prompting a search for effective treatments.
  • A study tested sofpironium bromide gel against a placebo in a double-blind, controlled crossover format involving 16 patients, measuring saliva production and salivation severity over a series of weeks.
  • Results showed a significant reduction in saliva volume, over 40% decrease in later weeks, and effects persisted even after stopping treatment, suggesting the gel is an effective option for managing this side effect.
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Anxiety disorders are heterogeneous, show a moderate genetic contribution and are associated with inconsistent cortical structure alterations. Here, we investigated whether genetic factors for anxiety disorders contribute to cortical alterations by conducting polygenic risk score (PRS) analyses. We calculated PRSs for anxiety disorders at several P value thresholds (from P ≤ 5.

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Background: Individuals with schizophrenia (SCZ) and bipolar disorder (BD) display cognitive impairments, but the impairments in those with SCZ are more prominent, supported by genetic overlap between SCZ and cognitive impairments. However, it remains unclear whether cognitive performances differ between individuals at high and low genetic risks for SCZ or BD.

Methods: Using the latest Psychiatric Genomics Consortium (PGC) data, we calculated PGC3 SCZ-, PGC3 BD-, and SCZ BD polygenic risk scores (PRSs) in 173 SCZ patients, 70 unaffected first-degree relatives (FRs) and 196 healthy controls (HCs).

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Ultraviolet-induced DNA lesions impede DNA replication and transcription and are therefore a potential source of genome instability. Here, we performed serial transfer experiments on nucleotide excision repair-deficient (rad14Δ) yeast cells in the presence of chronic low-dose ultraviolet irradiation, focusing on the mechanisms underlying adaptive responses to chronic low-dose ultraviolet irradiation. Our results show that the entire haploid rad14Δ population rapidly becomes diploid during chronic low-dose ultraviolet exposure, and the evolved diploid rad14Δ cells were more chronic low-dose ultraviolet-resistant than haploid cells.

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