研究者業績

岩田 仲生

イワタ ナカオ  (Nakao Iwata)

基本情報

所属
藤田医科大学 医学部 教授
学位
博士(医学)(名古屋大学)

J-GLOBAL ID
200901048638344557
researchmap会員ID
5000024641

外部リンク

1989年 名古屋大学医学部卒業
1993年 名古屋大学大学院修了 博士(医学)
1994年 名古屋大学医学部付属病院精神科 医員
1996年 National Institute of Health Visiting Fellow
1998年 藤田医科大学医学部精神神経科学 講師
2002年 藤田医科大学医学部精神神経科学 助教授
2003年 藤田医科大学医学部精神神経科学 教授(現職)
2011年 藤田医科大学研究支援推進本部 本部長(現職)
2015年 藤田医科大学医学部 医学部長(現職)
2016年 藤田医科大学 副学長(現職)
専門分野: 精神疾患の分子遺伝学、神経生化学、薬理遺伝学、臨床精神薬理学

学歴

 2

論文

 642
  • Taro Kishi, Kenji Sakuma, Shun Hamanaka, Yasufumi Nishii, Kosei Esaki, Yueren Zhao, Yuki Matsuda, Shinsuke Kito, Nakao Iwata
    PCN reports : psychiatry and clinical neurosciences 4(1) e70064 2025年3月  
    BACKGROUND: With 30%-50% of people with bipolar depression (BDep) not responding to multiple pharmacological treatments, alternative therapies are needed. Accelerated intermittent theta burst stimulation (aiTBS) over the left dorsolateral prefrontal cortex (L-DLPFC) has been employed for individuals with pharmacological treatment-resistant major depressive disorder (TR-MDD). Imaging studies have revealed reduced regional activity of the L-DLPFC for both TR-MDD and pharmacological treatment-resistant BDep (TR-BDep), suggesting that aiTBS over the L-DLPFC may be beneficial for people with TR-BDep. METHODS: A 6-week, double-blind, sham-controlled, randomized trial will be conducted to compare the efficacy and safety of aiTBS to the L-DLPFC in people with TR-BDep (jRCTs042240019). Fifty iTBS sessions (1800 pulses/session) will be delivered in 10 daily sessions over 5 consecutive days at 90% resting motor threshold. This aiTBS protocol is termed as Fujita Neuromodulation Therapy for Bipolar Depression (FNT-BD). Twenty-two participants (both sexes, aged 18-64 years) with TR-BDep (DSM-5-TR, Type I) will be recruited. The response rate at any given week of follow-up will be the primary efficacy outcome, defined as a reduction of ≥50% in the Montgomery Åsberg Depression Rating Scale (MADRS) score. Other outcomes will include MADRS score changes, remission rate (10 ≥ MADRS score), Clinical Global Impression-Improvement score, Clinical Global Impression-Severity score, discontinuation rate, and incidence of individual adverse events. RESULTS: We anticipate that individuals who receive the aiTBS treatment show significant improvement in depressing symptoms compared to those receiving sham treatment. CONCLUSIONS: This study will provide valuable evidence for both patients with TR-BDep and clinicians.
  • Sarah M C Colbert, Lauren Lepow, Brian Fennessy, Nakao Iwata, Masashi Ikeda, Takeo Saito, Chikashi Terao, Michael Preuss, Jyotishman Pathak, J John Mann, Hilary Coon, Niamh Mullins
    Translational psychiatry 15(1) 63-63 2025年2月20日  
    Suicidal ideation (SI) and behavior (SB) are major public health concerns, but risk factors for their development and progression are poorly understood. We used ICD codes and a natural language processing algorithm to identify individuals in a hospital biobank with SI-only, SB, and controls without either. We compared the profiles of SB and SI-only patients to controls, and each other, using phenome-wide association studies (PheWAS) and polygenic risk scores (PRS). PheWAS identified many risk factors for SB and SI-only, plus specific psychiatric disorders which may be involved in progression from SI-only to SB. PRS for suicide attempt were only associated with SB, and even after accounting for psychiatric disorder PRS. SI PRS were only associated with SI-only, although not after accounting for psychiatric disorder PRS. These findings advance understanding of distinct genetic and clinical risk factors for SB and SI-only, which will aid in early detection and intervention efforts.
  • Taro Kishi, Leslie Citrome, Kenji Sakuma, Shun Hamanaka, Yasufumi Nishii, Masakazu Hatano, Osamu Furukawa, Youichi Saito, Nakao Iwata
    Pharmacopsychiatry 2025年1月29日  
    The United States Food and Drug Administration approved the xanomeline-trospium combination in September 2024 for treating schizophrenia, based in part on three double-blind, randomized placebo-controlled trials in adults with schizophrenia experiencing acute psychosis. This random-effects model pairwise meta-analysis of those three trials found that xanomeline-trospium was comparable to placebo in terms of all-cause discontinuation, discontinuation rate due to adverse events, Simpson-Angus Scale score change, Barnes Akathisia Rating Scale score change, body weight change, body mass index change, blood pressure change, serum total cholesterol change, blood glucose change, QTc interval changes, and the incidence of headache, somnolence, insomnia, dizziness, akathisia, agitation, tachycardia, gastroesophageal reflux disease, diarrhea, increased weight, and decreased appetite. However, xanomeline-trospium was associated with a higher incidence of at least one adverse event, dry mouth, hypertension, nausea, vomiting, dyspepsia, and constipation, and increased serum triglyceride compared with placebo. Notably, xanomeline-trospium demonstrated superior efficacy than placebo in improving the Positive and Negative Syndrome Scale (PANSS) total score, PANSS positive subscale score, and PANSS negative subscale score.
  • Pichsinee Choomung, Yupeng He, Masaaki Matsunaga, Kenji Sakuma, Taro Kishi, Yuanying Li, Shinichi Tanihara, Nakao Iwata, Atsuhiko Ota
    JMIR formative research 9 e66330 2025年1月29日  
    BACKGROUND: Estimating the prevalence of schizophrenia in the general population remains a challenge worldwide, as well as in Japan. Few studies have estimated schizophrenia prevalence in the Japanese population and have often relied on reports from hospitals and self-reported physician diagnoses or typical schizophrenia symptoms. These approaches are likely to underestimate the true prevalence owing to stigma, poor insight, or lack of access to health care among respondents. To address these issues, we previously developed an artificial neural network (ANN)-based schizophrenia classification model (SZ classifier) using data from a large-scale Japanese web-based survey to enhance the comprehensiveness of schizophrenia case identification in the general population. In addition, we also plan to introduce a population-based survey to collect general information and sample participants matching the population's demographic structure, thereby achieving a precise estimate of the prevalence of schizophrenia in Japan. OBJECTIVE: This study aimed to estimate the prevalence of schizophrenia by applying the SZ classifier to random samples from the Japanese population. METHODS: We randomly selected a sample of 750 participants where the age, sex, and regional distributions were similar to Japan's demographic structure from a large-scale Japanese web-based survey. Demographic data, health-related backgrounds, physical comorbidities, psychiatric comorbidities, and social comorbidities were collected and applied to the SZ classifier, as this information was also used for developing the SZ classifier. The crude prevalence of schizophrenia was calculated through the proportion of positive cases detected by the SZ classifier. The crude estimate was further refined by excluding false-positive cases and including false-negative cases to determine the actual prevalence of schizophrenia. RESULTS: Out of 750 participants, 62 were classified as schizophrenia cases by the SZ classifier, resulting in a crude prevalence of schizophrenia in the general population of Japan of 8.3% (95% CI 6.6%-10.1%). Among these 62 cases, 53 were presumed to be false positives, and 3 were presumed to be false negatives. After adjustment, the actual prevalence of schizophrenia in the general population was estimated to be 1.6% (95% CI 0.7%-2.5%). CONCLUSIONS: This estimated prevalence was slightly higher than that reported in previous studies, possibly due to a more comprehensive disease classification methodology or, conversely, model limitations. This study demonstrates the capability of an ANN-based model to improve the estimation of schizophrenia prevalence in the general population, offering a novel approach to public health analysis.
  • Kevin S O'Connell, Maria Koromina, Tracey van der Veen, Toni Boltz, Friederike S David, Jessica Mei Kay Yang, Keng-Han Lin, Xin Wang, Jonathan R I Coleman, Brittany L Mitchell, Caroline C McGrouther, Aaditya V Rangan, Penelope A Lind, Elise Koch, Arvid Harder, Nadine Parker, Jaroslav Bendl, Kristina Adorjan, Esben Agerbo, Diego Albani, Silvia Alemany, Ney Alliey-Rodriguez, Thomas D Als, Till F M Andlauer, Anastasia Antoniou, Helga Ask, Nicholas Bass, Michael Bauer, Eva C Beins, Tim B Bigdeli, Carsten Bøcker Pedersen, Marco P Boks, Sigrid Børte, Rosa Bosch, Murielle Brum, Ben M Brumpton, Nathalie Brunkhorst-Kanaan, Monika Budde, Jonas Bybjerg-Grauholm, William Byerley, Judit Cabana-Domínguez, Murray J Cairns, Bernardo Carpiniello, Miquel Casas, Pablo Cervantes, Chris Chatzinakos, Hsi-Chung Chen, Tereza Clarence, Toni-Kim Clarke, Isabelle Claus, Brandon Coombes, Elizabeth C Corfield, Cristiana Cruceanu, Alfredo Cuellar-Barboza, Piotr M Czerski, Konstantinos Dafnas, Anders M Dale, Nina Dalkner, Franziska Degenhardt, J Raymond DePaulo, Srdjan Djurovic, Ole Kristian Drange, Valentina Escott-Price, Ayman H Fanous, Frederike T Fellendorf, I Nicol Ferrier, Liz Forty, Josef Frank, Oleksandr Frei, Nelson B Freimer, John F Fullard, Julie Garnham, Ian R Gizer, Scott D Gordon, Katherine Gordon-Smith, Tiffany A Greenwood, Jakob Grove, José Guzman-Parra, Tae Hyon Ha, Tim Hahn, Magnus Haraldsson, Martin Hautzinger, Alexandra Havdahl, Urs Heilbronner, Dennis Hellgren, Stefan Herms, Ian B Hickie, Per Hoffmann, Peter A Holmans, Ming-Chyi Huang, Masashi Ikeda, Stéphane Jamain, Jessica S Johnson, Lina Jonsson, Janos L Kalman, Yoichiro Kamatani, James L Kennedy, Euitae Kim, Jaeyoung Kim, Sarah Kittel-Schneider, James A Knowles, Manolis Kogevinas, Thorsten M Kranz, Kristi Krebs, Steven A Kushner, Catharina Lavebratt, Jacob Lawrence, Markus Leber, Heon-Jeong Lee, Calwing Liao, Susanne Lucae, Martin Lundberg, Donald J MacIntyre, Wolfgang Maier, Adam X Maihofer, Dolores Malaspina, Mirko Manchia, Eirini Maratou, Lina Martinsson, Manuel Mattheisen, Nathaniel W McGregor, Melvin G McInnis, James D McKay, Helena Medeiros, Andreas Meyer-Lindenberg, Vincent Millischer, Derek W Morris, Paraskevi Moutsatsou, Thomas W Mühleisen, Claire O'Donovan, Catherine M Olsen, Georgia Panagiotaropoulou, Sergi Papiol, Antonio F Pardiñas, Hye Youn Park, Amy Perry, Andrea Pfennig, Claudia Pisanu, James B Potash, Digby Quested, Mark H Rapaport, Eline J Regeer, John P Rice, Margarita Rivera, Eva C Schulte, Fanny Senner, Alexey Shadrin, Paul D Shilling, Engilbert Sigurdsson, Lisa Sindermann, Lea Sirignano, Dan Siskind, Claire Slaney, Laura G Sloofman, Olav B Smeland, Daniel J Smith, Janet L Sobell, Maria Soler Artigas, Dan J Stein, Frederike Stein, Mei-Hsin Su, Heejong Sung, Beata Świątkowska, Chikashi Terao, Markos Tesfaye, Martin Tesli, Thorgeir E Thorgeirsson, Jackson G Thorp, Claudio Toma, Leonardo Tondo, Paul A Tooney, Shih-Jen Tsai, Evangelia Eirini Tsermpini, Marquis P Vawter, Helmut Vedder, Annabel Vreeker, James T R Walters, Bendik S Winsvold, Stephanie H Witt, Hong-Hee Won, Robert Ye, Allan H Young, Peter P Zandi, Lea Zillich, Rolf Adolfsson, Martin Alda, Lars Alfredsson, Lena Backlund, Bernhard T Baune, Frank Bellivier, Susanne Bengesser, Wade H Berrettini, Joanna M Biernacka, Michael Boehnke, Anders D Børglum, Gerome Breen, Vaughan J Carr, Stanley Catts, Sven Cichon, Aiden Corvin, Nicholas Craddock, Udo Dannlowski, Dimitris Dikeos, Bruno Etain, Panagiotis Ferentinos, Mark Frye, Janice M Fullerton, Micha Gawlik, Elliot S Gershon, Fernando S Goes, Melissa J Green, Maria Grigoroiu-Serbanescu, Joanna Hauser, Frans A Henskens, Jens Hjerling-Leffler, David M Hougaard, Kristian Hveem, Nakao Iwata, Ian Jones, Lisa A Jones, René S Kahn, John R Kelsoe, Tilo Kircher, George Kirov, Po-Hsiu Kuo, Mikael Landén, Marion Leboyer, Qingqin S Li, Jolanta Lissowska, Christine Lochner, Carmel Loughland, Jurjen J Luykx, Nicholas G Martin, Carol A Mathews, Fermin Mayoral, Susan L McElroy, Andrew M McIntosh, Francis J McMahon, Sarah E Medland, Ingrid Melle, Lili Milani, Philip B Mitchell, Gunnar Morken, Ole Mors, Preben Bo Mortensen, Bertram Müller-Myhsok, Richard M Myers, Woojae Myung, Benjamin M Neale, Caroline M Nievergelt, Merete Nordentoft, Markus M Nöthen, John I Nurnberger, Michael C O'Donovan, Ketil J Oedegaard, Tomas Olsson, Michael J Owen, Sara A Paciga, Christos Pantelis, Carlos N Pato, Michele T Pato, George P Patrinos, Joanna M Pawlak, Josep Antoni Ramos-Quiroga, Andreas Reif, Eva Z Reininghaus, Marta Ribasés, Marcella Rietschel, Stephan Ripke, Guy A Rouleau, Panos Roussos, Takeo Saito, Ulrich Schall, Martin Schalling, Peter R Schofield, Thomas G Schulze, Laura J Scott, Rodney J Scott, Alessandro Serretti, Jordan W Smoller, Alessio Squassina, Eli A Stahl, Hreinn Stefansson, Kari Stefansson, Eystein Stordal, Fabian Streit, Patrick F Sullivan, Gustavo Turecki, Arne E Vaaler, Eduard Vieta, John B Vincent, Irwin D Waldman, Cynthia S Weickert, Thomas W Weickert, Thomas Werge, David C Whiteman, John-Anker Zwart, Howard J Edenberg, Andrew McQuillin, Andreas J Forstner, Niamh Mullins, Arianna Di Florio, Roel A Ophoff, Ole A Andreassen
    Nature 2025年1月22日  
    Bipolar disorder is a leading contributor to the global burden of disease1. Despite high heritability (60-80%), the majority of the underlying genetic determinants remain unknown2. We analysed data from participants of European, East Asian, African American and Latino ancestries (n = 158,036 cases with bipolar disorder, 2.8 million controls), combining clinical, community and self-reported samples. We identified 298 genome-wide significant loci in the multi-ancestry meta-analysis, a fourfold increase over previous findings3, and identified an ancestry-specific association in the East Asian cohort. Integrating results from fine-mapping and other variant-to-gene mapping approaches identified 36 credible genes in the aetiology of bipolar disorder. Genes prioritized through fine-mapping were enriched for ultra-rare damaging missense and protein-truncating variations in cases with bipolar disorder4, highlighting convergence of common and rare variant signals. We report differences in the genetic architecture of bipolar disorder depending on the source of patient ascertainment and on bipolar disorder subtype (type I or type II). Several analyses implicate specific cell types in the pathophysiology of bipolar disorder, including GABAergic interneurons and medium spiny neurons. Together, these analyses provide additional insights into the genetic architecture and biological underpinnings of bipolar disorder.
  • Taro Kishi, Kenji Sakuma, Masakazu Hatano, Nakao Iwata
    Brain stimulation 2025年1月15日  
  • Taro Kishi, Yuki Matsuda, Masakazu Hatano, Kenji Sakuma, Nakao Iwata
    Journal of affective disorders 2025年1月15日  
    Dummy.
  • Masahiro Nakatochi, Itaru Kushima, Branko Aleksic, Hiroki Kimura, Hidekazu Kato, Toshiya Inada, Youta Torii, Nagahide Takahashi, Maeri Yamamoto, Kunihiro Iwamoto, Yoshihiro Nawa, Shuji Iritani, Nakao Iwata, Takeo Saito, Kohei Ninomiya, Tomo Okochi, Ryota Hashimoto, Hidenaga Yamamori, Yuka Yasuda, Michiko Fujimoto, Kenichiro Miura, Kazutaka Ohi, Toshiki Shioiri, Kiyoyuki Kitaichi, Masanari Itokawa, Makoto Arai, Mitsuhiro Miyashita, Kazuya Toriumi, Tsutomu Takahashi, Michio Suzuki, Takahiro A Kato, Shigenobu Kanba, Hideki Horikawa, Kiyoto Kasai, Tempei Ikegame, Seiichiro Jinde, Tadafumi Kato, Chihiro Kakiuchi, Bun Yamagata, Shintaro Nio, Yasuto Kunii, Hirooki Yabe, Yasunobu Okamura, Shu Tadaka, Ueno Fumihiko, Taku Obara, Yasuyuki Yamamoto, Yuko Arioka, Daisuke Mori, Masashi Ikeda, Norio Ozaki
    Psychiatry and clinical neurosciences 2024年10月15日  
    AIM: Bipolar disorder (BD) is a common psychiatric disorder characterized by alterations between manic/hypomanic and depressive states. Rare pathogenic copy number variations (CNVs) that overlap with exons of synaptic genes have been associated with BD. However, no study has comprehensively explored CNVs in synaptic genes associated with BD. Here, we evaluated the relationship between BD and rare CNVs that overlap with synaptic genes, not limited to exons, in the Japanese population. METHODS: Using array comparative genome hybridization, we detected CNVs in 1839 patients with BD and 2760 controls. We used the Synaptic Gene Ontology database to identify rare CNVs that overlap with synaptic genes. Using gene-based analysis, we compared their frequencies between the BD and control groups. We also searched for synaptic gene sets related to BD. The significance level was set to a false discovery rate of 10%. RESULTS: The RNF216 gene was significantly associated with BD (odds ratio, 4.51 [95% confidence interval, 1.66-14.89], false discovery rate < 10%). The BD-associated CNV that corresponded with RNF216 also partially overlapped with the minimal critical region of the 7p22.1 microduplication syndrome. The integral component of the postsynaptic membrane (Gene Ontology:0099055) was significantly associated with BD. The CNV overlapping with the intron region of GRM5 in this gene set showed a nominal significant association between cases and controls (P < 0.05). CONCLUSION: We provide evidence that CNVs in RNF216 and postsynaptic membrane-related genes confer a risk of BD, contributing to a better understanding of the pathogenesis of BD.
  • Takuma Ashizawa, Takeo Saito, Tomo Okochi, Kohei Ninomiya, Kenta Ito, Rei Aoki, Masashi Ikeda, Nakao Iwata
    Translational Psychiatry 14(1) 2024年10月14日  
    Abstract Recent genome-wide association studies (GWASs) have identified fatty acid desaturase (FADS) genes, which code key enzymes involved in polyunsaturated fatty acid (PUFA) desaturation as susceptibility genes for bipolar disorder (BD). Several quantitative changes in PUFAs suggest their involvement in BD pathogenesis. Therefore, this study aimed to clarify the relationship between BD and PUFAs by conducting lipidomics covariating with the FADS gene variant (rs174550), which is associated with PUFA levels and BD susceptibility. The concentrations of 23 fatty acids were measured using plasma samples from the BD group (n = 535) and the control group (n = 107). Differences in each PUFA concentration ratio were compared between the two groups. Also, differences in each PUFA concentration ratio were compared for each genotype in rs174550. Our results showed that the BD group had significantly lower concentrations of linoleic acid (LA) (β = −0.36, p = 0.023) and arachidonic acid (AA) (β = −0.18, p = 0.013) than the control group. Concerning the effect of FADS on the PUFA concentration ratio, carriers of C-allele at rs174550 had significantly decreased γ-linolenic acid and AA concentration ratios. A previous GWAS reported that the presence of a C-allele at rs174550 increased the BD risk. This direction is consistent with the lipidomic results of the present study. In conclusion, both the FADS and BD were considered to regulate the AA concentration. Thus, as the FADS gene variant is crucial for conducting lipidomics of BD we believe that the allele frequency of FADS must be analyzed.
  • Taro Kishi, Toshikazu Ikuta, Kenji Sakuma, Shun Hamanaka, Yasufumi Nishii, Masakazu Hatano, Shinsuke Kito, Nakao Iwata
    JAMA network open 7(10) e2441159 2024年10月1日  
    IMPORTANCE: To date, several theta burst stimulation (TBS) protocols, such as intermittent TBS (iTBS), have been proposed; however, previous systematic reviews have revealed inconsistent efficacy findings in individual TBS studies for schizophrenia. OBJECTIVE: To examine which TBS protocols are associated with the most favorable and acceptable outcomes in adults with schizophrenia. DATA SOURCES: The Cochrane Library, PubMed, and Embase databases were searched for studies published before May 22, 2024. STUDY SELECTION: The inclusion criteria were as follows: (1) published and unpublished randomized clinical trials (RCTs) of any TBS treatment and (2) RCTs including individuals with schizophrenia spectrum disorders, other psychotic disorders, or both. DATA EXTRACTION AND SYNTHESIS: This study followed the Cochrane standards for data extraction and data quality assessment and used the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guideline for reporting. The risk of bias of individual studies was assessed using the second version of the Cochrane risk of bias tool, and the Confidence in Network Meta-Analysis application was used to rate the certainty of evidence for meta-analysis results. At least 2 authors double-checked the literature search, data transfer accuracy, and calculations. MAIN OUTCOMES AND MEASURES: The primary outcome of this study was improvement in scores related to negative symptoms. Our frequentist network meta-analysis used a random-effects model. The standardized mean difference (SMD) or odds ratio for continuous or dichotomous variables, respectively, was calculated with 95% CIs. RESULTS: A total of 30 RCTs of 9 TBS protocols, with 1424 participants, were included. Only iTBS over the left dorsolateral prefrontal cortex (L-DLPFC) was associated with reduced negative symptom scores (SMD, -0.89; 95% CI, -1.24 to -0.55), overall symptom scores (SMD, -0.81; 95% CI, -1.15 to -0.48), Positive and Negative Syndrome Scale general subscale scores (SMD, -0.57; 95% CI, -0.89 to -0.25), depressive symptom scores (SMD, -0.70; 95% CI, -1.04 to -0.37), and anxiety symptom scores (SMD, -0.58; 95% CI, -0.92 to -0.24) and improved overall cognitive impairment scores (SMD, -0.52; 95% CI, -0.89 to -0.15) compared with a sham. However, positive symptom score changes, all-cause discontinuation rate, discontinuation rate due to adverse events, headache incidence, and dizziness incidence did not significantly differ between any TBS protocols and sham. CONCLUSIONS AND RELEVANCE: In this network meta-analysis, iTBS over the L-DLPFC was associated with improved scores for negative, depressive, anxiety, and cognitive symptoms in individuals with schizophrenia and was well tolerated by the participants. Other forms of TBS were not associated with benefit. Further research is needed to assess the potential role of TBS in the treatment of schizophrenia.
  • Maria Koromina, Ashvin Ravi, Georgia Panagiotaropoulou, Brian M Schilder, Jack Humphrey, Alice Braun, Tim Bidgeli, Chris Chatzinakos, Brandon Coombes, Jaeyoung Kim, Xiaoxi Liu, Chikashi Terao, Kevin S O 'Connell, Mark Adams, Adolfsson Rolf, Martin Alda, Lars Alfredsson, Till F M Andlauer, Ole A Andreassen, Anastasia Antoniou, Bernhard T Baune, Susanne Bengesser, Joanna Biernacka, Michael Boehnke, Rosa Bosch, Murray J Cairns, Vaughan J Carr, Miquel Casas, Stanley Catts, Sven Cichon, Aiden Corvin, Nicholas Craddock, Konstantinos Dafnas, Nina Dalkner, Udo Dannlowski, Franziska Degenhardt, Arianna Di Florio, Dimitris Dikeos, Frederike Tabea Fellendorf, Panagiotis Ferentinos, Andreas J Forstner, Liz Forty, Mark Frye, Janice M Fullerton, Micha Gawlik, Ian R Gizer, Katherine Gordon-Smith, Melissa J Green, Maria Grigoroiu-Serbanescu, José Guzman-Parra, Tim Hahn, Frans Henskens, Jan Hillert, Assen V Jablensky, Lisa Jones, Ian Jones, Lina Jonsson, John R Kelsoe, Tilo Kircher, George Kirov, Sarah Kittel-Schneider, Manolis Kogevinas, Mikael Landén, Marion Leboyer, Melanie Lenger, Jolanta Lissowska, Christine Lochner, Carmel Loughland, Donald MacIntyre, Nicholas G Martin, Eirini Maratou, Carol A Mathews, Fermin Mayoral, Susan L McElroy, Nathaniel W McGregor, Andrew McIntosh, Andrew McQuillin, Patricia Michie, Philip B Mitchell, Paraskevi Moutsatsou, Bryan Mowry, Bertram Müller-Myhsok, Richard M Myers, Igor Nenadić, Caroline Nievergelt, Markus M Nöthen, John Nurnberger, Michael O 'Donovan, Claire O'Donovan, Roel A Ophoff, Michael J Owen, Christos Pantelis, Carlos Pato, Michele T Pato, George P Patrinos, Joanna M Pawlak, Roy H Perlis, Evgenia Porichi, Danielle Posthuma, Josep Antoni Ramos-Quiroga, Andreas Reif, Eva Z Reininghaus, Marta Ribasés, Marcella Rietschel, Ulrich Schall, Peter R Schofield, Thomas G Schulze, Laura Scott, Rodney J Scott, Alessandro Serretti, Cynthia Shannon Weickert, Jordan W Smoller, Maria Soler Artigas, Dan J Stein, Fabian Streit, Claudio Toma, Paul Tooney, Marquis P Vawter, Eduard Vieta, John B Vincent, Irwin D Waldman, Thomas Weickert, Stephanie H Witt, Kyung Sue Hong, Masashi Ikeda, Nakao Iwata, Beata Świątkowska, Hong-Hee Won, Howard J Edenberg, Stephan Ripke, Towfique Raj, Jonathan R I Coleman, Niamh Mullins
    medRxiv : the preprint server for health sciences 2024年9月17日  
    Bipolar disorder (BD) is a heritable mental illness with complex etiology. While the largest published genome-wide association study identified 64 BD risk loci, the causal SNPs and genes within these loci remain unknown. We applied a suite of statistical and functional fine-mapping methods to these loci, and prioritized 17 likely causal SNPs for BD. We mapped these SNPs to genes, and investigated their likely functional consequences by integrating variant annotations, brain cell-type epigenomic annotations, brain quantitative trait loci, and results from rare variant exome sequencing in BD. Convergent lines of evidence supported the roles of genes involved in neurotransmission and neurodevelopment including SCN2A, TRANK1, DCLK3, INSYN2B, SYNE1, THSD7A, CACNA1B, TUBBP5, PLCB3, PRDX5, KCNK4, CRTC3, AP001453.3, TRPT1, FKBP2, DNAJC4, RASGRP1, FURIN, FES, DPH1, GSDMB, MED24 and THRA in BD. These represent promising candidates for functional experiments to understand biological mechanisms and therapeutic potential. Additionally, we demonstrated that fine-mapping effect sizes can improve performance of BD polygenic risk scores across diverse populations, and present a high-throughput fine-mapping pipeline (https://github.com/mkoromina/SAFFARI).
  • Pichsinee Choomung, Yupeng He, Masaaki Matsunaga, Kenji Sakuma, Taro Kishi, Yuanying Li, Shinichi Tanihara, Nakao Iwata, Atsuhiko Ota
    JMIR Formative Research 2024年9月10日  
  • Pichsinee Choomung, Yupeng He, Masaaki Matsunaga, Kenji Sakuma, Taro Kishi, Yuanying Li, Shinichi Tanihara, Nakao Iwata, Atsuhiko Ota
    JMIR Formative Research 2024年9月10日  
  • Jun Ishigooka, Kazuyuki Nakagome, Tetsuro Ohmori, Nakao Iwata, Ken Inada, Jun-Ichi Iga, Taro Kishi, Kiyoshi Fujita, Yuka Kikuchi, Toshiaki Shichijo, Hideaki Tabuse, Shotatsu Koretsune, Hiroshi Terada, Haruko Terada, Toshifumi Kishimoto, Yuichiro Tsutsumi, Kazutaka Ohi
    BMC psychiatry 24(1) 600-600 2024年9月5日  
    BACKGROUND: We report the final results of treatment with aripiprazole, blonanserin, and paliperidone from the Japan Useful Medication Program for Schizophrenia (JUMPs), a 104-week naturalistic study. METHODS: JUMPs was an open-label, three-arm, randomized, parallel-group, 104-week study. Patients aged ≥ 20 years with schizophrenia requiring antipsychotic treatment or a switch from previous therapy were enrolled. The primary endpoint was treatment discontinuation rate over 104 weeks. Secondary endpoints included remission rate, Personal and Social Performance (PSP), safety, Positive and Negative Syndrome Scale (PANSS), and quality of life (QOL; EuroQol-5 dimension). RESULTS: In total, 251 patients received aripiprazole (n = 82), blonanserin (n = 85), or paliperidone (n = 84). Treatment discontinuation rates (aripiprazole, 80.5%; blonanserin, 81.2%; paliperidone, 71.4%) were not significantly different (p = 0.2385) among the treatment groups at 104 weeks; comparable outcomes were observed for endpoints, including remission (42.9%, 46.7%, and 45.8%), PANSS, and safety. In the overall cohort, while the improvement in the PSP total score at Week 104 was not significantly different from baseline, a significant improvement (p < 0.05) in QOL and total PANSS scores (including all subscales) was observed at Week 104 compared with baseline. Multivariable analysis identified a shorter disease duration and a higher chlorpromazine-equivalent antipsychotic dosage level (≥ 1000 mg) before switching to monotherapy as predictors of treatment discontinuation. CONCLUSIONS: The 104-week treatment outcomes were comparable between groups; the overall trend of improvement in remission rate, safety, and QOL suggests the importance of continued treatment. CLINICAL TRIAL REGISTRATION: UMIN-Clinical Trials Registry UMIN000007942 (public release date: 14/05/2012).
  • 清水 侑真, 三浦 直緒, 竹内 一平, 波多野 正和, 半谷 眞七子, 藤田 潔, 岩田 仲生, 亀井 浩行
    日本精神薬学会総会・学術集会プログラム・抄録集 8回 82-82 2024年9月  
  • 三浦 直緒, 清水 侑真, 竹内 一平, 波多野 正和, 半谷 眞七子, 藤田 潔, 岩田 仲生, 亀井 浩行
    日本精神薬学会総会・学術集会プログラム・抄録集 8回 92-92 2024年9月  
  • Kazuki Okumura, Tsutomu Takeda, Takashi Komori, Michihiro Toritsuka, Kazuhiko Yamamuro, Ryohei Takada, Minobu Ikehara, Kohei Kamikawa, Yuki Noriyama, Yuki Nishi, Rio Ishida, Yoshinori Kayashima, Takahira Yamauchi, Nakao Iwata, Manabu Makinodan
    Psychiatry and clinical neurosciences 2024年7月22日  
    AIM: Adverse childhood experiences are potentially traumatic events with long-lasting effects on the health and well-being of patients with autism spectrum disorder (ASD). It is important to clarify which types of long-lasting autism-related symptoms are influenced by childhood experiences to design future intervention studies. However, few studies have examined the association between childhood experiences and autistic symptoms in large samples of adults with ASD and individuals with typical development (TD). In this study, we evaluate the effects of adverse childhood experiences on multiple ASD phenotypes among both individuals with ASD and those with TD. METHOD: We combined questionnaire evaluations; Childhood Abuse and Trauma Scale, the Japanese version of the Autism-Spectrum Quotient, Conners' Adult ADHD Rating Scale, the Japanese version of the Impact of Event Scale-Revised, and the Japanese version of the Adolescent/Adult Sensory Profile. RESULTS: Individuals with ASD and those with TD (n = 205 and 104, respectively) were included. There were significant correlations between the extent of adverse childhood experiences and severity of attention-deficit/hyperactivity disorder symptoms, posttraumatic stress disorder symptoms, and hypersensitivity in both participants with ASD and those with TD. By contrast, ASD core symptoms showed no significant correlation with adverse childhood experiences in either group. These results remained consistent after adjusting for age, sex, and the estimated intelligence quotient. CONCLUSION: These findings suggest the need for a detailed disentanglement of ASD-related core and peripheral symptoms of adverse childhood experiences, which may help to appropriately set outcomes for future early interventions for the childhood experiences of individuals with ASD.
  • Taro Kishi, Toshikazu Ikuta, Kenji Sakuma, Masakazu Hatano, Yuki Matsuda, Jonas Wilkening, Roberto Goya-Maldonado, Martin Tik, Nolan R Williams, Shinsuke Kito, Nakao Iwata
    Molecular psychiatry 2024年6月6日  
    In clinical practice, theta burst stimulation (TBS) presents as a more efficient and potentially more effective therapeutic modality than conventional repetitive transcranial magnetic stimulation (rTMS), as it allows for the delivery of more stimuli in less time and at similar intensities. To date, accelerated treatment plans according to various continuous (cTBS) and intermittent TBS (iTBS) protocols for depression have been proposed. To investigate which of the TBS protocols provided a favorable risk-benefit balance for individuals with depression, this systematic review and random-effects model network meta-analysis was conducted. The study outcomes included response rate (primary), depression symptom improvement, remission rate, all-cause discontinuation rate, incidence of switch to mania, and incidence of headache/discomfort at treatment site. In this meta-analysis, a total of 23 randomized controlled trials (n = 960, mean age = 41.88 years, with 60.78% females) were included. Approximately 69.57% of the trials included individuals with an exclusive diagnosis of major depressive disorder. The following six TBS protocols (target) were evaluated: cTBS (right-dorsolateral prefrontal cortex [R-DLPFC]), cTBS (R-DLPFC) + iTBS (left-DLPFC [L-DLPFC]), iTBS (L-DLPFC), iTBS (L-DLPFC) + iTBS (R-DLPFC), iTBS (left-dorsomedial prefrontal cortex) + iTBS (right-dorsomedial prefrontal cortex), and iTBS (occipital lobe). Compared to sham, cTBS (R-DLPFC) + iTBS (L-DLPFC), iTBS (L-DLPFC), and iTBS (occipital lobe) had a higher response rate (k = 23); cTBS (R-DLPFC) + iTBS (L-DLPFC) and iTBS (L-DLPFC) dominated in the depression symptom improvement (k = 23); and iTBS (L-DLPFC) had a higher remission rate (k = 15). No significant differences were found for all-cause discontinuation rate (k = 17), incidence of switch to mania (k = 7), and incidence of headache/discomfort at treatment site (k = 10) between any TBS protocols and sham. Thus, cTBS (R-DLPFC) + iTBS (L-DLPFC) and iTBS (L-DLPFC) demonstrate favorable risk-benefit balance for the treatment of depression.
  • Yupeng He, Kenji Sakuma, Taro Kishi, Yuanying Li, Masaaki Matsunaga, Shinichi Tanihara, Nakao Iwata, Atsuhiko Ota
    Journal of Clinical Medicine 13(10) 2970-2970 2024年5月17日  
    Background and Objective: Excellent generalizability is the precondition for the widespread practical implementation of machine learning models. In our previous study, we developed the schizophrenia classification model (SZ classifier) to identify potential schizophrenia patients in the Japanese population. The SZ classifier has exhibited impressive performance during internal validation. However, ensuring the robustness and generalizability of the SZ classifier requires external validation across independent sample sets. In this study, we aimed to present an external validation of the SZ classifier using outpatient data. Methods: The SZ classifier was trained by using online survey data, which incorporate demographic, health-related, and social comorbidity features. External validation was conducted using an outpatient sample set which is independent from the sample set during the model development phase. The model performance was assessed based on the sensitivity and misclassification rates for schizophrenia, bipolar disorder, and major depression patients. Results: The SZ classifier demonstrated a sensitivity of 0.75 when applied to schizophrenia patients. The misclassification rates were 59% and 55% for bipolar disorder and major depression patients, respectively. Conclusions: The SZ classifier currently encounters challenges in accurately determining the presence or absence of schizophrenia at the individual level. Prior to widespread practical implementation, enhancements are necessary to bolster the accuracy and diminish the misclassification rates. Despite the current limitations of the model, such as poor specificity for certain psychiatric disorders, there is potential for improvement if including multiple types of psychiatric disorders during model development.
  • Taro Kishi, Kenji Sakuma, Takeo Saito, Atsuo Nakagawa, Masaki Kato, Nakao Iwata
    Neuropsychopharmacology Reports 44(1) 165-175 2024年3月  
    Aim: This systematic review and frequentist network meta-analysis used random-effects models is conducted to determine whether there are differences in the efficacy, acceptability, tolerability, and safety profiles of brexpiprazole (BRE) and aripiprazole (ARI) for Japanese with major depressive disorder (MDD) who were inadequately responsive to antidepressants. Methods: Outcome measures were scores on the Montgomery Åsberg Depression Rating Scale (primary), the Clinical Global Impression severity scale, and social functioning scale; the non-response rate; the non-remission rate; all-cause discontinuation; discontinuation due to adverse events (DAE); at least one adverse event (1AE); serious adverse event, akathisia; tremor; weight gain. Results: A literature search identified three double-blind, randomized, placebo-controlled trials. These comprised one BRE study (with a 1 mg/day [BRE1] and a 2 mg/day [BRE2]) and two ARI studies (with a 3 mg/day arm and a flexible-dose arm[within the dosage range approved in Japan]) (n = 1736). Both BRE and ARI demonstrated better efficacy than the placebo. BRE but not ARI had a higher DAE than the placebo. ARI but not BRE had a higher 1AE than the placebo. BRE and ARI had a higher risk of akathisia and weight gain than the placebo. There were no significant differences between BRE and ARI for any of the outcomes. Although BRE1 had good efficacy, it carried risk of weight gain. Although BRE2 also had efficacy, it carried risks of DAE, akathisia, and weight gain. However, the risk of akathisia in BRE2 was reduced by an initial dose of 0.5 mg/day rather than 1.0 mg/day. Conclusions: Overall BRE showed similar utility to ARI and a good risk–benefit balance.
  • Taro Kishi, Kenji Sakuma, Masakazu Hatano, Takenori Okumura, Masaki Kato, Hajime Baba, Nakao Iwata
    Neuropsychopharmacology reports 2024年2月6日  
    AIM: To update the major depressive disorder (MDD) treatment guidelines of the Japanese Society of Mood Disorders, we conducted a systematic review and pairwise meta-analysis of double-blind, randomized, placebo-controlled trials of available antidepressants in Japan for older adults with MDD. METHODS: Outcome measures included response rate (primary), improvement in depressive symptom scale score, remission rate, all-cause discontinuation, discontinuation due to adverse events, and at least one adverse event. A random-effects model was used to calculate the risk ratio (RR) and standardized mean difference (SMD) with a 95% confidence interval (95% CI). RESULTS: Nine double-blind, randomized, placebo-controlled trials (n = 2145) were identified. No study has been conducted in Japan. Our meta-analysis included the following antidepressants: duloxetine, escitalopram, imipramine, sertraline, venlafaxine, and vortioxetine. Antidepressants have significantly higher response rates than placebo (RR [95% CI] = 1.38 [1.04, 1.83], p = 0.02). Antidepressants outperformed placebo in terms of improving depressive symptom scale score (SMD [95% CI] = -0.62 [-0.92, -0.33], p < 0.0001). However, antidepressants were associated with a higher discontinuation rate due to adverse events (RR [95% CI] = 1.94 [1.30, 2.88], p = 0.001) and a higher incidence of at least one adverse event (RR [95% CI] = 1.11 [1.02, 1.21], p = 0.02) compared to placebo. The groups did not differ significantly in terms of remission rate or all-cause discontinuation. CONCLUSIONS: Our meta-analysis concluded that treatment with antidepressants available in Japan is only weakly recommended for moderate to severe MDD in older adults.
  • Taro Kishi, Toshikazu Ikuta, Kenji Sakuma, Masakazu Hatano, Yuki Matsuda, Satoru Esumi, Nobumi Miyake, Itaru Miura, Masaki Kato, Nakao Iwata
    Psychiatry and clinical neurosciences 2023年11月20日  
  • Yupeng He, Masaaki Matsunaga, Yuanying Li, Taro Kishi, Shinichi Tanihara, Nakao Iwata, Takahiro Tabuchi, Atsuhiko Ota
    JMIR Formative Research 7 e50193-e50193 2023年11月15日  
    Background In Japan, challenges were reported in accurately estimating the prevalence of schizophrenia among the general population. Retrieving previous studies, we investigated that patients with schizophrenia were more likely to experience poor subjective well-being and various physical, psychiatric, and social comorbidities. These factors might have great potential for precisely classifying schizophrenia cases in order to estimate the prevalence. Machine learning has shown a positive impact on many fields, including epidemiology, due to its high-precision modeling capability. It has been applied in research on mental disorders. However, few studies have applied machine learning technology to the precise classification of schizophrenia cases by variables of demographic and health-related backgrounds, especially using large-scale web-based surveys. Objective The aim of the study is to construct an artificial neural network (ANN) model that can accurately classify schizophrenia cases from large-scale Japanese web-based survey data and to verify the generalizability of the model. Methods Data were obtained from a large Japanese internet research pooled panel (Rakuten Insight, Inc) in 2021. A total of 223 individuals, aged 20-75 years, having schizophrenia, and 1776 healthy controls were included. Answers to the questions in a web-based survey were formatted as 1 response variable (self-report diagnosed with schizophrenia) and multiple feature variables (demographic, health-related backgrounds, physical comorbidities, psychiatric comorbidities, and social comorbidities). An ANN was applied to construct a model for classifying schizophrenia cases. Logistic regression (LR) was used as a reference. The performances of the models and algorithms were then compared. Results The model trained by the ANN performed better than LR in terms of area under the receiver operating characteristic curve (0.86 vs 0.78), accuracy (0.93 vs 0.91), and specificity (0.96 vs 0.94), while the model trained by LR showed better sensitivity (0.63 vs 0.56). Comparing the performances of the ANN and LR, the ANN was better in terms of area under the receiver operating characteristic curve (bootstrapping: 0.847 vs 0.773 and cross-validation: 0.81 vs 0.72), while LR performed better in terms of accuracy (0.894 vs 0.856). Sleep medication use, age, household income, and employment type were the top 4 variables in terms of importance. Conclusions This study constructed an ANN model to classify schizophrenia cases using web-based survey data. Our model showed a high internal validity. The findings are expected to provide evidence for estimating the prevalence of schizophrenia in the Japanese population and informing future epidemiological studies.
  • Tzuyao Lo, Itaru Kushima, Hiroki Kimura, Branko Aleksic, Takashi Okada, Hidekazu Kato, Toshiya Inada, Yoshihiro Nawa, Youta Torii, Maeri Yamamoto, Ryo Kimura, Yasuko Funabiki, Hirotaka Kosaka, Shusuke Numata, Kiyoto Kasai, Tsukasa Sasaki, Shigeru Yokoyama, Toshio Munesue, Ryota Hashimoto, Yuka Yasuda, Michiko Fujimoto, Masahide Usami, Masanari Itokawa, Makoto Arai, Kazutaka Ohi, Toshiyuki Someya, Yuichiro Watanabe, Jun Egawa, Tsutomu Takahashi, Michio Suzuki, Hidenori Yamasue, Nakao Iwata, Masashi Ikeda, Norio Ozaki
    Neuropsychopharmacology reports 2023年11月1日  
    AIM: The present study aimed to examine the association between copy number variations (CNVs) in parkin (PRKN) and schizophrenia (SCZ) and autism spectrum disorder (ASD) in a large case-control sample. METHOD: Array comparative genomic hybridization was performed on 3111 cases with SCZ, 1236 cases with ASD, and 2713 controls. We systematically prioritized likely pathogenic CNVs (LP-CNVs) in PRKN and examined their association with SCZ and ASD. RESULTS: In total, 3014 SCZ cases (96.9%), 1205 ASD cases (97.5%), and 2671 controls (98.5%) passed quality control. We found that monoallelic carriers of LP-CNVs in PRKN were common (70/6890, 1.02%) and were not at higher risk of SCZ (p = 0.29) or ASD (p = 0.72). We observed that the distribution pattern of LP-CNVs in the Japanese population was consistent with those in other populations. We also identified a patient diagnosed with SCZ and early-onset Parkinson's disease carrying biallelic pathogenic CNVs in PRKN. The absence of Parkinson's symptoms in 10 other monoallelic carriers of the same pathogenic CNV further reflects the lack of effect of monoallelic pathogenic variants in PRKN in the absence of a second hit. CONCLUSION: The present findings suggest that monoallelic CNVs in PRKN do not confer a significant risk for SCZ or ASD. However, further studies to investigate the association between biallelic CNVs in PRKN and SCZ and ASD are warranted.
  • Shun Hamanaka, Taro Kishi, Kenji Sakuma, Yasufumi Nishii, Masakazu Hatano, Nakao Iwata
    Journal of psychiatric research 167 132-138 2023年10月16日  
    The benefits of serotonin 3 receptor antagonists (5-HT3R-As) in obsessive-compulsive disorder (OCD) treatment remain unclear. Thus, this study aimed to perform a systematic review and a random-effects meta-analysis, including double-blind, randomized, placebo-controlled trials (DBRPCTs). The outcomes include the Yale-Brown Obsessive Compulsive Scale (Y-BOCS) total score (primary), Y-BOCS obsession subscale score, Y-BOCS compulsive subscale score, treatment response, remission rate, all-cause discontinuation, and incidence of individual adverse events (nervousness/restlessness/anxiety, insomnia, headache, dizziness/lightheadedness, decreased appetite, constipation, nausea/vomiting, diarrhea, dry mouth, sweating/increased perspiration, itching/pruritus, tremor, and sexual dysfunction/decreased libido). The mean differences (MD) for continuous outcomes and risk ratios for dichotomous outcomes with 95% confidence intervals (CIs) were calculated. Our study included 10 DBRPCTs (n = 628). Pooled 5-HT3R-As outperformed placebo regarding Y-BOCS total score (MD = -5.08, 95% CI = -7.04, -3.12, N = 9, n = 560), Y-BOCS obsession subscale score, Y-BOCS compulsive subscale score, treatment response, and remission rate. Individually, all 5-HT3R-As outperformed placebo regarding Y-BOCS total score (granisetron: MD = -5.59, 95% CI = -8.79, -2.39, N = 3, n = 178, ondansetron: MD = -5.72, 95% CI = -8.06, -3.37, N = 6, n = 331, tropisetron: MD = -2.87, 95% CI = -5.19, -0.550, N = 1, n = 96). However, all-cause discontinuation and incidence of individual adverse events between pooled 5-HT3R-As and placebo were not significantly different. In conclusion, our meta-analysis suggested 5-HT3R-As as efficacious for symptom improvement in individuals with OCD. However, the number of individuals included in each study was small; thus, a replication randomized trial of 5-HT3R-As should be conducted using a larger sample size.
  • 竹内 正樹, 廣瀬 真里奈, 岩田 仲生, 北島 剛司
    日本睡眠学会定期学術集会・日本時間生物学会学術大会合同大会プログラム・抄録集 45回・30回 276-276 2023年9月  
  • Taro Kishi, Kenji Sakuma, Masakazu Hatano, Yuki Matsuda, Satoru Esumi, Nobumi Miyake, Itaru Miura, Hikaru Hori, Masaki Kato, Nakao Iwata
    Neuropsychopharmacology reports 2023年8月30日  
    INTRODUCTION: The question remains to be elucidated: "Is treatment with antidepressants at doses approved in Japan effective for Japanese patients with MDD?" It is crucial to confirm this in order to provide appropriate treatments for Japanese patients with major depressive disorder (MDD). Therefore, we conducted a systematic review and random-effects pairwise meta-analysis including these nine double-blind, randomized, placebo-controlled trials. METHODS: We calculated the standardized mean difference (SMD) and risk ratio (RR) with a 95% confidence interval (95% CI). RESULTS: Pooled newer antidepressants outperformed placebo regarding improvement of depressive symptom scale scores [SMD (95% CI) = -0.20 (-0.27, -0.12), p < 0.00001], response to treatment [RR (95% CI) = 1.23 (1.13, 1.32), p < 0.00001], and remission rate [RR (95% CI) = 1.30 (1.16, 1.45), p < 0.00001]. Although all-cause discontinuation was not significantly different between the treatment groups, the pooled antidepressant group showed a higher discontinuation rate due to adverse event [RR (95% CI) = 1.60 (1.13, 2.26), p = 0.007] and a higher incidence of at least one adverse event than the placebo group [RR (95% CI) = 1.13 (1.08, 1.18), p < 0.00001]. DISCUSSION: We concluded that newer antidepressants are effective for Japanese adults with MDD although the clinicians must monitor the health conditions of these individuals.
  • Taro Kishi, Kenji Sakuma, Yuki Matsuda, Shinsuke Kito, Nakao Iwata
    Psychiatry research 328 115452-115452 2023年8月28日  
    Our meta-analysis demonstrated that intermittent theta burst stimulation (iTBS)/bilateral-TBS (Bi-TBS) and high-frequency repetitive transcranial magnetic stimulation (HF-rTMS)/bilateral-rTMS (Bi-rTMS) had similar efficacy, acceptability, and safety profiles for antidepressant treatment-resistant major depressive disorder (AD-TRD). In our sensitivity analysis that excluded a study that compared Bi-TBS with Bi-rTMS for older adults, all efficacy outcomes were also comparable between iTBS and HF-rTMS. Because iTBS does not require higher stimulation intensity and a longer stimulus time than conventional HF-rTMS protocols, we speculated that for those with AD-TRD, iTBS/Bi-TBS is a more helpful therapeutic modality in clinical practice than HF-rTMS/Bi-rTMS.
  • Kota Funahashi, Marina Hirose, Suguru Kondo, Yoshimi Sano, Shiho Fujita, Nakao Iwata, Tsuyoshi Kitajima
    Fujita medical journal 9(3) 218-224 2023年8月  
    OBJECTIVES: We evaluated the continuity and effectiveness of oral appliances (OAs) for treating obstructive sleep apnea (OSA) in a psychiatric sleep clinic, specifically focusing on mild cases and those with psychiatric comorbidity. METHODS: We retrospectively examined the medical records of 106 OSA patients treated with OA. Survival analysis was performed to assess the discontinuation of OA use. Clinical Global Impression-Improvement (CGI-I) scale were obtained from medical records. The apnea-hypopnea index (AHI), measured by polysomnography (PSG), and Epworth Sleepiness Scale (ESS) were compared between diagnosis and after post-OA treatment if a second PSG for efficacy assessment was conducted. RESULTS: Among all 106 patients, Kaplan-Meier analysis estimated a discontinuation rate of 16.8% at 1 year. This tended to be higher for OSA patients with psychiatric comorbidity (22.7%) than those without (11.6%), though it was not statistically significant (P=0.08). The overall rate of improvement in CGI-I scale was 37.7% and was significantly lower in OSA patients with psychiatric comorbidity (25.0%) than those without (48.3%). Among the 74 patients who underwent a second PSG, AHI and ESS were significantly lower after OA treatment for the entire group and subgroups of OSA severity at diagnosis and psychiatric comorbidity, except for ESS in the moderate OSA severity subgroup. CONCLUSION: OA continuation was relatively good, and sleepiness was relieved by OA use, even in mild OSA patients and those with psychiatric comorbidity. However, the continuation and subjective improvement of symptoms were slightly lower in OSA patients with psychiatric comorbidity.
  • Rina Yokoi, Masakazu Hatano, Hiroyuki Kamei, Aoi Morita, Manako Hanya, Nakao Iwata, Shigeki Yamada
    Fujita medical journal 9(3) 231-235 2023年8月  
    OBJECTIVES: To investigate the subjective assessments of an antipsychotic treatment with brexpiprazole. METHODS: This was a 14-week prospective observational study. Nineteen patients participated in the study between February 2019 and January 2020. RESULTS: Patients had a mean age of 40.6±14.2 years and a Clinical Global Impressions-Severity of Illness scale (CGI-S) score of 4.6±1.2 at the initiation of brexpiprazole treatment. The Subjective Well-being under Neuroleptic drug treatment Short form, Japanese version (SWNS-J) total score significantly improved from 68.1±22.3 in week 2 to 79.5±21.0 in week 14 (p=0.0084). The SWNS-J subscales of self-control and social integration status also significantly improved from 14.0±4.7 and 13.9±6.0 in week 2 to 17.0±4.7 and 16.0±5.1 in week 14, respectively (p=0.0053 and 0.012, respectively). No significant improvements were observed in any other SWNS-J subscales or the Drug Attitude Inventory-10 (DAI-10) in the 14-week observation period. Moreover, the SWNS-J total score did not correlate with the DAI-10 (r=0.31, p=0.19), or CGI-S (r=-0.18, p=0.47) scores. CONCLUSIONS: The present results suggest that brexpiprazole might improve subjective well-being, although this may not necessarily reflect psychopathological improvements. To enhance medication adherence, it is important to perform subjective assessments on patients over time.
  • Hiroyuki Kamei, Tsuyoshi Kitajima, Masakazu Hatano, Ippei Takeuchi, Manako Hanya, Kiyoshi Fujita, Nakao Iwata
    Research in Clinical Pharmacy 1(1) 10-21 2023年6月30日  
  • Yu-Han H. Hsu, Greta Pintacuda, Ruize Liu, Eugeniu Nacu, April Kim, Kalliopi Tsafou, Natalie Petrossian, William Crotty, Jung Min Suh, Jackson Riseman, Jacqueline M. Martin, Julia C. Biagini, Daya Mena, Joshua K.T. Ching, Edyta Malolepsza, Taibo Li, Tarjinder Singh, Tian Ge, Shawn B. Egri, Benjamin Tanenbaum, Caroline R. Stanclift, Annie M. Apffel, Steven A. Carr, Monica Schenone, Jake Jaffe, Nadine Fornelos, Hailiang Huang, Kevin C. Eggan, Kasper Lage, Stephan Ripke, Benjamin M. Neale, Aiden Corvin, James T.R. Walters, Kai-How Farh, Peter A. Holmans, Phil Lee, Brendan Bulik-Sullivan, David A. Collier, Hailiang Huang, Tune H. Pers, Ingrid Agartz, Esben Agerbo, Margot Albus, Madeline Alexander, Farooq Amin, Silviu A. Bacanu, Martin Begemann, Richard A. Belliveau, Judit Bene, Sarah E. Bergen, Elizabeth Bevilacqua, Tim B. Bigdeli, Donald W. Black, Richard Bruggeman, Nancy G. Buccola, Randy L. Buckner, William Byerley, Wiepke Cahn, Guiqing Cai, Dominique Campion, Rita M. Cantor, Vaughan J. Carr, Noa Carrera, Stanley V. Catts, Kimberley D. Chambert, Raymond C.K. Chan, Ronald Y.L. Chan, Eric Y.H. Chen, Wei Cheng, Eric FC. Cheung, Siow Ann Chong, C. Robert Cloninger, David Cohen, Nadine Cohen, Paul Cormican, Nick Craddock, James J. Crowley, David Curtis, Michael Davidson, Kenneth L. Davis, Franziska Degenhardt, Jurgen Del Favero, Ditte Demontis, Dimitris Dikeos, Timothy Dinan, Srdjan Djurovic, Gary Donohoe, Elodie Drapeau, Jubao Duan, Frank Dudbridge, Naser Durmishi, Peter Eichhammer, Johan Eriksson, Valentina Escott-Price, Laurent Essioux, Ayman H. Fanous, Martilias S. Farrell, Josef Frank, Lude Franke, Robert Freedman, Nelson B. Freimer, Marion Friedl, Joseph I. Friedman, Menachem Fromer, Giulio Genovese, Lyudmila Georgieva, Ina Giegling, Paola Giusti-Rodríguez, Stephanie Godard, Jacqueline I. Goldstein, Vera Golimbet, Srihari Gopal, Jacob Gratten, Lieuwe de Haan, Christian Hammer, Marian L. Hamshere, Mark Hansen, Thomas Hansen, Vahram Haroutunian, Annette M. Hartmann, Frans A. Henskens, Stefan Herms, Joel N. Hirschhorn, Per Hoffmann, Andrea Hofman, Mads V. Hollegaard, David M. Hougaard, Masashi Ikeda, Inge Joa, Antonio Julià, René S. Kahn, Luba Kalaydjieva, Sena Karachanak-Yankova, Juha Karjalainen, David Kavanagh, Matthew C. Keller, James L. Kennedy, Andrey Khrunin, Yunjung Kim, Janis Klovins, James A. Knowles, Bettina Konte, Vaidutis Kucinskas, Zita Ausrele Kucinskiene, Hana Kuzelova-Ptackova, Anna K. Kähler, Claudine Laurent, Jimmy Lee, S. Hong Lee, Sophie E. Legge, Bernard Lerer, Miaoxin Li, Tao Li, Kung-Yee Liang, Jeffrey Lieberman, Svetlana Limborska, Carmel M. Loughland, Jan Lubinski, Jouko Lönnqvist, Milan Macek, Patrik K.E. Magnusson, Brion S. Maher, Wolfgang Maier, Jacques Mallet, Sara Marsal, Manuel Mattheisen, Morten Mattingsdal, Robert W. McCarley, Colm McDonald, Andrew M. McIntosh, Sandra Meier, Carin J. Meijer, Bela Melegh, Ingrid Melle, Raquelle I. Mesholam-Gately, Andres Metspalu, Patricia T. Michie, Lili Milani, Vihra Milanova, Younes Mokrab, Derek W. Morris, Ole Mors, Kieran C. Murphy, Robin M. Murray, Inez Myin-Germeys, Bertram Müller-Myhsok, Mari Nelis, Igor Nenadic, Deborah A. Nertney, Gerald Nestadt, Kristin K. Nicodemus, Liene Nikitina-Zake, Laura Nisenbaum, Annelie Nordin, Eadbhard O'Callaghan, Colm O'Dushlaine, F. Anthony O'Neill, Sang-Yun Oh, Ann Olincy, Line Olsen, Jim Van Os, Christos Pantelis, George N. Papadimitriou, Sergi Papiol, Elena Parkhomenko, Michele T. Pato, Tiina Paunio, Milica Pejovic-Milovancevic, Diana O. Perkins, Olli Pietiläinen, Jonathan Pimm, Andrew J. Pocklington, John Powell, Alkes Price, Ann E. Pulver, Shaun M. Purcell, Digby Quested, Henrik B. Rasmussen, Abraham Reichenberg, Mark A. Reimers, Alexander L. Richards, Joshua L. Roffman, Panos Roussos, Douglas M. Ruderfer, Veikko Salomaa, Alan R. Sanders, Ulrich Schall, Christian R. Schubert, Thomas G. Schulze, Sibylle G. Schwab, Edward M. Scolnick, Rodney J. Scott, Larry J. Seidman, Jianxin Shi, Engilbert Sigurdsson, Teimuraz Silagadze, Jeremy M. Silverman, Kang Sim, Petr Slominsky, Jordan W. Smoller, Hon-Cheong So, Chris C.A. Spencer, Eli A. Stahl, Hreinn Stefansson, Stacy Steinberg, Elisabeth Stogmann, Richard E. Straub, Eric Strengman, Jana Strohmaier, T Scott Stroup, Mythily Subramaniam, Jaana Suvisaari, Dragan M. Svrakic, Jin P. Szatkiewicz, Erik Söderman, Srinivas Thirumalai, Draga Toncheva, Sarah Tosato, Juha Veijola, John Waddington, Dermot Walsh, Dai Wang, Qiang Wang, Bradley T. Webb, Mark Weiser, Dieter B. Wildenauer, Nigel M. Williams, Stephanie Williams, Stephanie H. Witt, Aaron R. Wolen, Emily H.M. Wong, Brandon K. Wormley, Hualin Simon Xi, Clement C. Zai, Xuebin Zheng, Fritz Zimprich, Naomi R. Wray, Kari Stefansson, Peter M. Visscher, Rolf Adolfsson, Ole A. Andreassen, Douglas H.R. Blackwood, Elvira Bramon, Joseph D. Buxbaum, Anders D. Børglum, Sven Cichon, Ariel Darvasi, Enrico Domenici, Hannelore Ehrenreich, Tõnu Esko, Pablo V. Gejman, Michael Gill, Hugh Gurling, Christina M. Hultman, Nakao Iwata, Assen V. Jablensky, Erik G. Jönsson, Kenneth S. Kendler, George Kirov, Jo Knight, Todd Lencz, Douglas F. Levinson, Qingqin S. Li, Jianjun Liu, Anil K. Malhotra, Steven A. McCarroll, Andrew McQuillin, Jennifer L. Moran, Preben B. Mortensen, Bryan J. Mowry, Markus M. Nöthen, Roel A. Ophoff, Michael J. Owen, Aarno Palotie, Carlos N. Pato, Tracey L. Petryshen, Danielle Posthuma, Marcella Rietschel, Brien P. Riley, Dan Rujescu, Pak C. Sham, Pamela Sklar, David St Clair, Daniel R. Weinberger, Jens R. Wendland, Thomas Werge, Mark J. Daly, Patrick F. Sullivan, Michael C. O'Donovan, Hailiang Huang, Shengying Qin, Akira Sawa, Sibylle G. Schwab, Rene Kahn, Kyung Sue Hong, Wenzhao Shi, Ming Tsuang, Masanari Itokawa, Gang Feng, Jianjun Liu, Stephen J. Glatt, Nakao Iwata, Masashi Ikeda, Xiancang Ma, Jimmy Lee, Jinsong Tang, Yunfeng Ruan, Ruize Liu, Feng Zhu, Yasue Horiuchi, Byung Dae Lee, Eun-Jeong Joo, Woojae Myung, Kyooseob Ha, Hong-Hee Won, Ji Hyung Baek, Young Chul Chung, Sung-Wan Kim, Dieter B. Wildenauer, Agung Kusumawardhani, Wei J. Chen, Hai-Gwo Hwu, Kang Sim, Akitoyo Hishimoto, Ikuo Otsuka, Ichiro Sora, Tomoko Toyota, Takeo Yoshikawa, Hiroshi Kunugi, Kotaro Hattori, Sayuri Ishiwata, Shusuke Numata, Tetsuro Ohmori, Makoto Arai, Yuji Ozeki, Kumiko Fujii, Se Joo Kim, Heon-Jeong Lee, Yong Min Ahn, Se Hyun Kim, Kazufumi Akiyama, Kazutaka Shimoda, Makoto Kinoshita
    iScience 26(5) 106701-106701 2023年5月  
  • Yuichi Esaki, Kenji Obayashi, Keigo Saeki, Kiyoshi Fujita, Nakao Iwata, Tsuyoshi Kitajima
    Psychiatry and clinical neurosciences 2023年4月24日  
    AIM: Sleep disturbance, a core feature of bipolar disorder, is closely associated with mood symptoms. We examined the association between actigraphy sleep parameters and mood episode relapses in patients with bipolar disorder. METHODS: This prospective cohort study analyzed 193 outpatients with bipolar disorder who participated in the Association between the Pathology of Bipolar Disorder and Light Exposure in Daily Life (APPLE) cohort study. The participants' sleep was objectively evaluated via actigraphy over 7 consecutive days for the baseline assessment and then at the 2-year follow-up appointment for mood episode relapses. The actigraphy sleep parameters were presented using the mean and variability (standard deviation) of each sleep parameter for 7 days. RESULTS: Of the 193 participants, 110 (57%) experienced mood episodes during follow-up. The participants with higher variability in total sleep time had a significantly shorter mean estimated time to mood episode relapses than those with lower variability (12.5 vs. 16.8 months; P < 0.001). The Cox proportional hazards model, when adjusted for potential confounders, demonstrated that variability in total sleep time was significantly associated with an increase in the mood episode relapses (per hour; hazard ratio [HR], 1.407; 95% confidence interval (CI), 1.057-1.873), mainly in the depressive episodes (per hour; HR, 1.477; 95% CI, 1.088-2.006). CONCLUSIONS: Our findings suggest that consistency in sleep time might be useful, as an adjunct therapy, in preventing the recurrence or relapse of mood episodes in bipolar disorder. This article is protected by copyright. All rights reserved.
  • Taro Kishi, Toshikazu Ikuta, Kenji Sakuma, Masakazu Hatano, Yuki Matsuda, Shinsuke Kito, Nakao Iwata
    Molecular psychiatry 2023年4月5日  
  • Masaaki Matsunaga, Yuanying Li, Yupeng He, Taro Kishi, Shinichi Tanihara, Nakao Iwata, Takahiro Tabuchi, Atsuhiko Ota
    International Journal of Environmental Research and Public Health 20(5) 4336-4336 2023年2月28日  
    The physical, psychiatric, and social comorbidities interfere with the everyday activities of community-dwelling individuals with schizophrenia and increase the risk of their readmission. However, these comorbidities have not been investigated comprehensively in Japan. We conducted a self-reported internet survey in February 2022 to identify individuals aged 20–75 years with and without schizophrenia using a prevalence case-control study. The survey compared physical comorbidities such as being overweight, hypertension, and diabetes; psychiatric comorbidities such as depressive symptoms and sleep disturbances; social comorbidities such as employment status, household income, and social support between participants with and without schizophrenia. A total of 223 participants with schizophrenia and 1776 participants without schizophrenia were identified. Participants with schizophrenia were more likely to be overweight and had a higher prevalence of hypertension, diabetes, and dyslipidemia than participants without schizophrenia. Additionally, depressive symptoms, unemployment, and non-regular employment were more prevalent in participants with schizophrenia than those without schizophrenia. These results highlight the necessity of comprehensive support and interventions addressing physical, psychiatric, and social comorbidities in individuals with schizophrenia in the community. In conclusion, effective interventions for managing comorbidities in individuals with schizophrenia are necessary to enable them to continue to live in the community.
  • Kenji Sakuma, Taro Kishi, Shohei Sanji, Ikuo Nomura, Masakazu Hatano, Makoto Okuya, Nakao Iwata
    Psychiatry and clinical neurosciences 77(5) 297-299 2023年2月21日  
  • Hirona Yamamoto, Hyeon-Cheol Lee-Okada, Masashi Ikeda, Takumi Nakamura, Takeo Saito, Atsushi Takata, Takehiko Yokomizo, Nakao Iwata, Tadafumi Kato, Takaoki Kasahara
    Molecular Psychiatry 28(7) 2848-2856 2023年2月21日  
    Abstract Large-scale genome-wide association studies (GWASs) on bipolar disorder (BD) have implicated the involvement of the fatty acid desaturase (FADS) locus. These enzymes (FADS1 and FADS2) are involved in the metabolism of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which are thought to potentially benefit patients with mood disorders. To model reductions in the activity of FADS1/2 affected by the susceptibility alleles, we generated mutant mice heterozygously lacking both Fads1/2 genes. We measured wheel-running activity over six months and observed bipolar swings in activity, including hyperactivity and hypoactivity. The hyperactivity episodes, in which activity was far above the norm, usually lasted half a day; mice manifested significantly shorter immobility times on the behavioral despair test performed during these episodes. The hypoactivity episodes, which lasted for several weeks, were accompanied by abnormal circadian rhythms and a marked decrease in wheel running, a spontaneous behavior associated with motivation and reward systems. We comprehensively examined lipid composition in the brain and found that levels of certain lipids were significantly altered between wild-type and the heterozygous mutant mice, but no changes were consistent with both sexes and either DHA or EPA was not altered. However, supplementation with DHA or a mixture of DHA and EPA prevented these episodic behavioral changes. Here we propose that heterozygous Fads1/2 knockout mice are a model of BD with robust constitutive, face, and predictive validity, as administration of the mood stabilizer lithium was also effective. This GWAS-based model helps to clarify how lipids and their metabolisms are involved in the pathogenesis and treatment of BD.
  • Taro Kishi, Kenji Sakuma, Masakazu Hatano, Makoto Okuya, Nakao Iwata
    Asian journal of psychiatry 82 103502-103502 2023年2月3日  
  • Yuki Matsuda, Kenji Sakuma, Taro Kishi, Kosei Esaki, Shinsuke Kito, Masahiro Shigeta, Nakao Iwata
    Brain stimulation 2023年2月1日  
  • Taro Kishi, Kenji Sakuma, Yuki Matsuda, Shinsuke Kito, Nakao Iwata
    Bipolar disorders 2023年1月20日  
  • Taro Kishi, Kenji Sakuma, Masakazu Hatano, Makoto Okuya, Yuki Matsuda, Masaki Kato, Nakao Iwata
    Molecular psychiatry 28(3) 974-976 2022年12月23日  
  • Yuichi Esaki, Kenji Obayashi, Keigo Saeki, Kiyoshi Fujita, Nakao Iwata, Tsuyoshi Kitajima
    Journal of affective disorders 323 762-769 2022年12月17日  
    BACKGROUND: Circadian activity rhythm disruption is a core feature in bipolar disorder. We investigated whether light exposure in daily life is associated with circadian activity rhythms in patients with bipolar disorder. METHODS: In a cross-sectional study, we enrolled 194 outpatients with bipolar disorder who were participants of the Association between Pathology of Bipolar Disorder and Light Exposure in Daily Life (APPLE) cohort study. The participants' physical activity and daytime illuminance were measured using an actigraph over 7 consecutive days. Nighttime illuminance in the bedroom was measured using a portable photometer. Circadian activity rhythm parameters were calculated using cosinor analysis and a nonparametric circadian rhythm analysis. RESULTS: The median daytime illuminance and nighttime illuminance were 224.5 lx (interquartile range, 154.5-307.5 lx) and 2.3 lx (0.3-9.4 lx), respectively. Multivariable linear regression analysis, adjusted for potential confounding factors, showed that higher daytime illuminance was significantly associated with higher amplitude and most active continuous 10-hour period, advanced acrophase, higher interdaily stability, and lower intradaily variability. Higher nighttime illuminance was significantly associated with lower relative amplitude, delayed onset of the least active continuous 5-hour period, and higher intradaily variability. LIMITATIONS: As this was a cross-sectional study, the results do not necessarily imply that light exposure alters circadian activity rhythms. CONCLUSIONS: Daytime light exposure was associated with a positive effect and nighttime light exposure with a negative effect on circadian activity rhythms in bipolar disorder.
  • 岸 太郎, 佐久間 健二, 波多野 正和, 横井 里奈, 岩田 仲生
    臨床精神薬理 25(12) 1319-1322 2022年12月  
    双極性障害は躁病エピソードやうつ病エピソードに代表される急性期と急性期症状が改善し臨床的に安定した維持期に大別される。最新のメタ解析研究では,各病期に対して様々な薬物治療の使用が提案されているが,薬物の種類に加え,それら薬物の用量にも着目した診療が重要である。本稿では,2017年に発表されたThe International College of Neuro-Psychopharmacology(CINP)Treatment Guidelines for Bipolar Disorder in Adults(CINP-BD-2017)で推奨されている各薬剤の推奨用量を各病期別にまとめる。(著者抄録)
  • Taro Kishi, Kenji Sakuma, Masakazu Hatano, Nakao Iwata
    Psychiatry and clinical neurosciences 77(2) 119-121 2022年11月4日  
  • Motoi Terabe, Tsuyoshi Kitajima, Atsuhiko Ota, Hiroshi Yatsuya, Nakao Iwata
    Fujita medical journal 8(4) 103-107 2022年11月  
    OBJECTIVES: The influence of habitual alcohol consumption on insomnia symptoms in healthy workers remains unclear. In this study, we evaluated the association between habitual alcohol consumption among civil servants and insomnia symptoms such as difficulty falling asleep, difficulty staying asleep, and tiredness after sleep, using longitudinal data. METHODS: We enrolled civil servants in a prospective cohort study who completed questionnaires at baseline. Of those, 2861 participants were revaluated in a 5-year follow-up survey. Insomnia symptoms during the past month were assessed using self-reporting. Alcohol drinking habits were assessed by querying the frequency of drinking alcohol as well as the amount of alcohol usually consumed per one occasion. RESULTS: Drinking alcohol every day was less likely to have difficulty falling asleep (odds ratio, 0.42 95% confidence interval, 0.20-0.89), and drinking alcohol 3 or more days a week was associated with difficulty staying asleep (odds ratio, 1.48; 95% confidence interval, 1.16-1.90). CONCLUSIONS: Drinking alcohol every day may produce subjective improvement in sleep onset. However, drinking alcohol 3 or more days a week may increase arousal during sleep, which contributes to reduced sleep quality. These results suggest the possibility that long-term daily habitual drinking may reinforce a sense of improvement in subjective sleep onset but may possibly induce sleep disturbance.
  • Masashi Ikeda, Takeo Saito, Tetsufumi Kanazawa, Taro Kishi, Nakao Iwata
    Psychiatry and clinical neurosciences 76(11) 596-598 2022年11月  
  • Takeo Saito, Masashi Ikeda, Chikashi Terao, Takuma Ashizawa, Masami Miyata, Satoshi Tanaka, Tetsufumi Kanazawa, Tadafumi Kato, Taro Kishi, Nakao Iwata
    Psychiatry and clinical neurosciences 77(2) 118-119 2022年10月25日  
  • Taro Kishi, Toshikazu Ikuta, Kenji Sakuma, Makoto Okuya, Masakazu Hatano, Yuki Matsuda, Nakao Iwata
    Molecular psychiatry 28(1) 402-409 2022年10月17日  
    A systematic review and random-effects model network meta-analysis were conducted to compare the efficacy, acceptability, tolerability, and safety of antidepressants to treat adults with major depressive disorder (MDD) in the maintenance phase. This study searched the PubMed, Cochrane Library, and Embase databases and included only double-blind, randomized, placebo-controlled trials with an enrichment design: patients were stabilized on the antidepressant of interest during the open-label study and then randomized to receive the same antidepressant or placebo. The outcomes were the 6-month relapse rate (primary outcome, efficacy), all-cause discontinuation (acceptability), discontinuation due to adverse events (tolerability), and the incidence of individual adverse events. The risk ratio with a 95% credible interval was calculated. The meta-analysis comprised 34 studies (n = 9384, mean age = 43.80 years, and %females = 68.10%) on 20 antidepressants (agomelatine, amitriptyline, bupropion, citalopram, desvenlafaxine, duloxetine, escitalopram, fluoxetine, fluvoxamine, levomilnacipran, milnacipran, mirtazapine, nefazodone, paroxetine, reboxetine, sertraline, tianeptine, venlafaxine, vilazodone, and vortioxetine) and a placebo. In terms of the 6-month relapse rate, amitriptyline, citalopram, desvenlafaxine, duloxetine, fluoxetine, fluvoxamine, mirtazapine, nefazodone, paroxetine, reboxetine, sertraline, tianeptine, venlafaxine, and vortioxetine outperformed placebo. Compared to placebo, desvenlafaxine, paroxetine, sertraline, venlafaxine, and vortioxetine had lower all-cause discontinuation; however, sertraline had a higher discontinuation rate due to adverse events. Compared to placebo, venlafaxine was associated with a lower incidence of dizziness, while desvenlafaxine, sertraline, and vortioxetine were associated with a higher incidence of nausea/vomiting. In conclusion, desvenlafaxine, paroxetine, venlafaxine, and vortioxetine had reasonable efficacy, acceptability, and tolerability in the treatment of adults with stable MDD.
  • Itaru Kushima, Masahiro Nakatochi, Branko Aleksic, Takashi Okada, Hiroki Kimura, Hidekazu Kato, Mako Morikawa, Toshiya Inada, Kanako Ishizuka, Youta Torii, Yukako Nakamura, Satoshi Tanaka, Miho Imaeda, Nagahide Takahashi, Maeri Yamamoto, Kunihiro Iwamoto, Yoshihiro Nawa, Nanayo Ogawa, Shuji Iritani, Yu Hayashi, Tzuyao Lo, Gantsooj Otgonbayar, Sho Furuta, Nakao Iwata, Masashi Ikeda, Takeo Saito, Kohei Ninomiya, Tomo Okochi, Ryota Hashimoto, Hidenaga Yamamori, Yuka Yasuda, Michiko Fujimoto, Kenichiro Miura, Masanari Itokawa, Makoto Arai, Mitsuhiro Miyashita, Kazuya Toriumi, Kazutaka Ohi, Toshiki Shioiri, Kiyoyuki Kitaichi, Toshiyuki Someya, Yuichiro Watanabe, Jun Egawa, Tsutomu Takahashi, Michio Suzuki, Tsukasa Sasaki, Mamoru Tochigi, Fumichika Nishimura, Hidenori Yamasue, Hitoshi Kuwabara, Tomoyasu Wakuda, Takahiro A Kato, Shigenobu Kanba, Hideki Horikawa, Masahide Usami, Masaki Kodaira, Kyota Watanabe, Takeo Yoshikawa, Tomoko Toyota, Shigeru Yokoyama, Toshio Munesue, Ryo Kimura, Yasuko Funabiki, Hirotaka Kosaka, Minyoung Jung, Kiyoto Kasai, Tempei Ikegame, Seiichiro Jinde, Shusuke Numata, Makoto Kinoshita, Tadafumi Kato, Chihiro Kakiuchi, Kazuhiro Yamakawa, Toshimitsu Suzuki, Naoki Hashimoto, Shuhei Ishikawa, Bun Yamagata, Shintaro Nio, Toshiya Murai, Shuraku Son, Yasuto Kunii, Hirooki Yabe, Masumi Inagaki, Yu-Ichi Goto, Yuto Okumura, Tomoya Ito, Yuko Arioka, Daisuke Mori, Norio Ozaki
    Biological psychiatry 92(5) 362-374 2022年9月1日  
    BACKGROUND: We aimed to determine the similarities and differences in the roles of genic and regulatory copy number variations (CNVs) in bipolar disorder (BD), schizophrenia (SCZ), and autism spectrum disorder (ASD). METHODS: Based on high-resolution CNV data from 8708 Japanese samples, we performed to our knowledge the largest cross-disorder analysis of genic and regulatory CNVs in BD, SCZ, and ASD. RESULTS: In genic CNVs, we found an increased burden of smaller (<100 kb) exonic deletions in BD, which contrasted with the highest burden of larger (>500 kb) exonic CNVs in SCZ/ASD. Pathogenic CNVs linked to neurodevelopmental disorders were significantly associated with the risk for each disorder, but BD and SCZ/ASD differed in terms of the effect size (smaller in BD) and subtype distribution of CNVs linked to neurodevelopmental disorders. We identified 3 synaptic genes (DLG2, PCDH15, and ASTN2) as risk factors for BD. Whereas gene set analysis showed that BD-associated pathways were restricted to chromatin biology, SCZ and ASD involved more extensive and similar pathways. Nevertheless, a correlation analysis of gene set results indicated weak but significant pathway similarities between BD and SCZ or ASD (r = 0.25-0.31). In SCZ and ASD, but not BD, CNVs were significantly enriched in enhancers and promoters in brain tissue. CONCLUSIONS: BD and SCZ/ASD differ in terms of CNV burden, characteristics of CNVs linked to neurodevelopmental disorders, and regulatory CNVs. On the other hand, they have shared molecular mechanisms, including chromatin biology. The BD risk genes identified here could provide insight into the pathogenesis of BD.
  • 亀井 浩行, 竹内 一平, 波多野 正和, 清水 侑真, 飯田 優美, 當真 菜央, 横井 里奈, 半谷 眞七子, 宇野 準二, 山田 成樹, 藤田 潔, 岩田 仲生
    日本精神薬学会誌 6(1) 32-40 2022年9月  
    2019年9月から2021年8月までに、藤田医科大学病院、桶狭間病院藤田こころケアセンターで統合失調症と診断され、ブロナンセリン(BNS)貼付剤4週間以上の使用経験がある20歳以上の患者32名(入院患者22名、外来患者10名)に効果の実感度、副作用等が患者の満足度や薬剤の継続意思に及ぼす影響について検討した。23名(男性10名、女性13名、平均年齢52.6±12.6歳)から質問紙への調査協力を得た。罹病期間は平均26.0±16.0年であり、DAI-10の合計スコアは平均5.7±3.9であった。BNS貼付剤の投与量は40mgが7名、80mgが16名であった。BNS貼付剤の投与は前薬からの切り替えが15名、前薬への上乗せ処方が8名であった。BNS貼付剤の効果については「大変効果がある」6名、「大体効果がある」12名との回答で、78.3%の対象者が効果を感じていた。皮膚症状や使用方法の負担を強く感じている場合でも、薬剤の効果を実感している患者は使用満足度が高いことが示唆された。

MISC

 634

書籍等出版物

 6

共同研究・競争的資金等の研究課題

 15