片山 奈理子 (カタヤマ ナリコ)

Katayama, Nariko

写真a

所属(所属キャンパス)

医学部 精神・神経科学教室 (信濃町)

職名

助教(有期)

 

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  • Neural and clinical changes of cognitive behavioural therapy versus talking control in patients with major depression: A study protocol for a randomised clinical trial

    Katayama N., Nakagawa A., Abe T., Kurata C., Sasaki Y., Mitsuda D., Nakao S., Mizuno S., Ozawa M., Nakagawa Y., Ishikawa N., Umeda S., Terasawa Y., Tabuchi H., Kikuchi T., Mimura M.

    BMJ Open (BMJ Open)  10 ( 2 )  2020年02月

     概要を見る

    While major depression causes substantial distress and impairment for affected individuals and society, the effectiveness of cognitive behavioural therapy (CBT) in treating the condition has been established. However, the therapeutic mechanism underlying the efficacy of CBT remains unknown. This study aimed to describe a protocol for a randomised controlled trial that will measure the CBT-induced clinical and neural changes in patients with non-psychotic major depression. Methods and analysis The current study is a 16-week assessor-blinded, randomised, parallel-group trial with a 12-month follow-up as part of usual depression care at an outpatient clinic. Patients aged 20-69 years with major depressive disorder will be randomly assigned to receive either CBT in addition to their usual treatment or talking control in addition to their usual treatment for 16 weeks. The primary outcome is the functional changes in the brain areas that have been associated with future-oriented thinking at 16 weeks; secondary outcomes include changes in functional brain connectivity, severity and changes in the scores of objective and subjective clinical depression symptoms, proportion of responders and remitters and quality of life. The intention-to-treat analysis will be used. Ethics and dissemination All protocols and the informed consent form are compliant with the Ethics Guideline for Clinical Research (Japanese Ministry of Health, Labour and Welfare). Ethical Review Committees at the Keio University School of Medicine have approved the study protocol (version 3, 11 September 2017). We will disseminate research findings to scientific and general audiences through national and international conference presentations as well as lay summaries to the general public, including mental health consumer and publications in international peer-reviewed psychiatry and brain imaging journals. Trial registration number UMIN Clinical Trials Registry (UMIN000018155); Pre-results.

  • Glutamatergic neurometabolite levels in major depressive disorder: a systematic review and meta-analysis of proton magnetic resonance spectroscopy studies

    Moriguchi S., Takamiya A., Noda Y., Horita N., Wada M., Tsugawa S., Plitman E., Sano Y., Tarumi R., ElSalhy M., Katayama N., Ogyu K., Miyazaki T., Kishimoto T., Graff-Guerrero A., Meyer J.H., Blumberger D.M., Daskalakis Z.J., Mimura M., Nakajima S.

    Molecular Psychiatry (Molecular Psychiatry)  24 ( 7 ) 952 - 964 2019年07月

    ISSN  13594184

     概要を見る

    Alterations in glutamatergic neurotransmission are implicated in the pathophysiology of depression, and the glutamatergic system represents a treatment target for depression. To summarize the nature of glutamatergic alterations in patients with depression, we conducted a meta-analysis of proton magnetic resonance ( H-MRS) spectroscopy studies examining levels of glutamate. We used the search terms: depress* AND (MRS OR “magnetic resonance spectroscopy”). The search was performed with MEDLINE, Embase, and PsycINFO. The inclusion criteria were H-MRS studies comparing levels of glutamate + glutamine (Glx), glutamate, or glutamine between patients with depression and healthy controls. Standardized mean differences (SMD) were calculated to assess group differences in the levels of glutamatergic neurometabolites. Forty-nine studies met the eligibility criteria, which included 1180 patients and 1066 healthy controls. There were significant decreases in Glx within the medial frontal cortex (SMD = −0.38; 95% CI, −0.69 to −0.07) in patients with depression compared with controls. Subanalyses revealed that there was a significant decrease in Glx in the medial frontal cortex in medicated patients with depression (SMD = −0.50; 95% CI, −0.80 to −0.20), but not in unmedicated patients (SMD = −0.27; 95% CI, −0.76 to 0.21) compared with controls. Overall, decreased levels of glutamatergic metabolites in the medial frontal cortex are linked with the pathophysiology of depression. These findings are in line with the hypothesis that depression may be associated with abnormal glutamatergic neurotransmission. 1 1

  • Frontopolar cortex activation associated with pessimistic future-thinking in adults with major depressive disorder

    Katayama N., Nakagawa A., Umeda S., Terasawa Y., Kurata C., Tabuchi H., Kikuchi T., Mimura M.

    NeuroImage: Clinical (NeuroImage: Clinical)  23 2019年

     概要を見る

    Background: Pessimistic thinking about the future is one of the cardinal symptoms of major depressive disorder (MDD) and is an important domain of cognitive functioning associated with hopelessness. Neuroimaging studies have shown that the frontopolar cortex (Brodmann area [BA] 10) is involved in thinking about the future and demonstrated that patients with MDD have dysfunctions in BA10. However, the relationship between pessimistic thinking about the future and brain activity is unclear. Hence, we aimed to compare brain activity during future-thinking between patients with MDD and healthy individuals. Methods: We assessed 23 patients with current MDD and 23 healthy individuals. Participants were instructed to imagine the future or to recall the past using the future-thinking paradigm with four distinct temporal conditions (distant future, near future, distant past, and near past) during functional MRI. Resting-state functional MRI was also performed to explore the functional connectivity of BA10. Results: Compared with healthy individuals, patients with MDD had greater negative thinking about the distant future and exhibited increased activation in the medial BA10 when imagining the distant future, following small-volume correction focusing on the frontopolar a priori region of interest (family-wise error correction p < 0.05). Increased positive functional correlation between the right BA10 seed region and the posterior cingulate cortex was also observed. Conclusion: Patients with MDD who show greater pessimistic thinking about the distant future demonstrate increased activation in the frontopolar cortex. These findings are consistent with the hypothesis that frontopolar cortical dysfunction plays a key role in the hopelessness that manifests in patients with MDD.

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  • fMRIを用いたうつ病のネガティブな考え込み(反芻思考)の神経基盤の解明

    2021年04月
    -
    2024年03月

    文部科学省・日本学術振興会, 科学研究費助成事業, 片山 奈理子, 若手研究, 補助金,  研究代表者

 

担当授業科目 【 表示 / 非表示

  • 現代社会と医学Ⅰ

    2022年度

  • 現代社会と医学Ⅰ

    2021年度

  • 現代社会と医学Ⅰ

    2020年度