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  1. Article

    Open Access

    Epigenetic signals associated with delirium replicated across four independent cohorts

    Delirium is risky and indicates poor outcomes for patients. Therefore, it is crucial to create an effective delirium detection method. However, the epigenetic pathophysiology of delirium remains largely unknow...

    Yoshitaka Nishizawa, Kaitlyn C. Thompson, Takehiko Yamanashi in Translational Psychiatry (2024)

  2. Article

    Open Access

    DNA methylation in the inflammatory genes after neurosurgery and diagnostic ability of post-operative delirium

    The pathophysiological mechanisms of postoperative delirium (POD) are still not clear, and no reliable biomarker is available to differentiate those with and without POD. Pre- and post-surgery blood from epile...

    Takehiko Yamanashi, Takaaki Nagao, Nadia E. Wahba in Translational Psychiatry (2021)

  3. Article

    Open Access

    Mortality among patients with sepsis associated with a bispectral electroencephalography (BSEEG) score

    We have previously developed a bispectral electroencephalography (BSEEG) device, which was shown to be effective in detecting delirium and predicting patient outcomes. In this study we aimed to apply the BSEEG...

    Takehiko Yamanashi, Pedro S. Marra, Kaitlyn J. Crutchley in Scientific Reports (2021)

  4. Article

    Open Access

    Topological data analysis (TDA) enhances bispectral EEG (BSEEG) algorithm for detection of delirium

    Current methods for screening and detecting delirium are not practical in clinical settings. We previously showed that a simplified EEG with bispectral electroencephalography (BSEEG) algorithm can detect delir...

    Takehiko Yamanashi, Mari Kajitani, Masaaki Iwata in Scientific Reports (2021)

  5. Article

    Open Access

    Discontinuation of antidepressants after remission with antidepressant medication in major depressive disorder: a systematic review and meta-analysis

    A significant clinical issue encountered after a successful acute major depressive disorder (MDD) treatment is the relapse of depressive symptoms. Although continuing maintenance therapy with antidepressants i...

    Masaki Kato, Hikaru Hori, Takeshi Inoue, Junichi Iga, Masaaki Iwata in Molecular Psychiatry (2021)

  6. Article

    Open Access

    Beta-hydroxybutyrate, an endogenous NLRP3 inflammasome inhibitor, attenuates anxiety-related behavior in a rodent post-traumatic stress disorder model

    Accumulating evidence suggests that elevated inflammation contributes to the pathophysiology of post-traumatic stress disorder (PTSD) and that anti-inflammatory drugs might be a new treatment strategy for PTSD...

    Takehiko Yamanashi, Masaaki Iwata, Midori Shibushita in Scientific Reports (2020)

  7. Article

    Open Access

    Beta-hydroxybutyrate, an endogenic NLRP3 inflammasome inhibitor, attenuates stress-induced behavioral and inflammatory responses

    Neuro-inflammation has been shown to play a critical role in the development of depression. Beta-hydroxybutyrate (BHB) is a ketone body and has recently been reported to exert anti-inflammatory effects via inh...

    Takehiko Yamanashi, Masaaki Iwata, Naho Kamiya, Kyohei Tsunetomi in Scientific Reports (2017)

  8. Article

    Open Access

    Association of fronto-temporal function with cognitive ability in schizophrenia

    Deficits in neuropsychological performance are common in schizophrenia, but their relationship with the fronto-temporal functional abnormalities associated with this condition remains unclear. We explored the ...

    Shenghong Pu, Kazuyuki Nakagome, Masashi Itakura, Masaaki Iwata in Scientific Reports (2017)

  9. No Access

    Article

    Integrating neuroimmune systems in the neurobiology of depression

  10. The neurobiology of depression features dichotomous alterations in corticolimbic brain regions. For example, the prefrontal cortex and hippocampus exhibit neur...

  11. Eric S. Wohleb, Tina Franklin, Masaaki Iwata in Nature Reviews Neuroscience (2016)

  12. Article

    Open Access

    Associations between depressive symptoms and fronto-temporal activities during a verbal fluency task in patients with schizophrenia

    Though depressive symptoms are common in patients with schizophrenia, they are often left untreated and are associated with a high relapse rate, suicidal ideation, increased mortality, reduced social adjustmen...

    Shenghong Pu, Kazuyuki Nakagome, Akihiko Miura, Masaaki Iwata in Scientific Reports (2016)

  13. Article

    Open Access

    Social cognition and prefrontal hemodynamic responses during a working memory task in schizophrenia

    Social cognition is an important determinant of functional impairment in schizophrenia, but its relationship with the prefrontal functional abnormalities associated with the condition is still unclear. The pre...

    Shenghong Pu, Kazuyuki Nakagome, Takeshi Yamada, Masashi Itakura in Scientific Reports (2016)

  14. No Access

    Article

    REDD1 is essential for stress-induced synaptic loss and depressive behavior

    Chronic stress can lead to depression. Ronald Duman and his colleagues show that REDD1 expression is increased in the brain of patients with major depressive disorder and is upregulated in the brains of stress...

    Kristie T Ota, Rong-Jian Liu, Bhavya Voleti, Jaime G Maldonado-Aviles in Nature Medicine (2014)

  15. No Access

    Article

    Crystal Structures of N2,N,N8-Tri-/;-toluenesulfonyl-2,5,8-triaza[9]-paracyclophane and N2,N5,N8-Tri-p-toluenesulfonyl-14-hydroxy-15-hydroxymethyl-O14,O15’-isopropylidene-ll-methyl-2,5,8-triaza [9] (2,5)pyridinophane

    Masaaki Iwata, Kimiko Kobayashi, Sei Tsuboyama in Analytical Sciences (1998)

  16. No Access

    Article

    Crystal Structure of N,N′-Ditosyl-O,O′-dimesyl-3,6-diazaoctane-1,8-diol

    Masaaki Iwata, Kimiko Kobayashi, Sei Tsuboyama in Analytical Sciences (1997)

  17. No Access

    Article

    Crystal Structure of N1, N14-Dibenzyl-N5, N10, N18, N23-tetra(toluene-p-sulfonyl)-1, 5, 10, 14, 18, 23-hexaazacyclohexacosane: New 26-Membered Hexaaza-Coronand

    Masaaki Iwata, Kimiko Kobayashi, Sei Tsuboyama in Analytical Sciences (1996)