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2021 Fiscal Year Final Research Report

Reserach of depression focusing on D-amino acids

Research Project

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Project/Area Number 19K08075
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52030:Psychiatry-related
Research InstitutionThe University of Tokushima

Principal Investigator

NUMATA Shusuke  徳島大学, 大学院医歯薬学研究部(医学域), 教授 (10403726)

Co-Investigator(Kenkyū-buntansha) 戸田 裕之  防衛医科大学校(医学教育部医学科進学課程及び専門課程、動物実験施設、共同利用研究施設、病院並びに防衛, 精神科学, 准教授 (00610677)
朴 秀賢  熊本大学, 大学院生命科学研究部(医), 准教授 (60455665)
古賀 農人  防衛医科大学校(医学教育部医学科進学課程及び専門課程、動物実験施設、共同利用研究施設、病院並びに防衛, 精神科学, 助教 (70744936)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywordsうつ病 / D体アミノ酸 / モデル動物 / 血液
Outline of Final Research Achievements

To reveal the molecular biological mechanisms of mood disorders, amino acid concentrations were measured in human blood and mouse brain, distinguishing between D- and L- amino acids. The D- amino acids that could be measured in human plasma were Asn, Ser, Ala, and Pro. The D- amino acids measurable in the model animal brain were Ser, Asp, and Ala. The D- amino acids measurable in both human plasma and animal brain models of depression were Ser and Ala. Serum total D- amino acid concentrations were measured and compared in depressed patients, bipolar patients, and healthy controls, and no significant differences were found between the three groups.

Free Research Field

分子精神医学分野

Academic Significance and Societal Importance of the Research Achievements

D-アミノ酸は生体内含量が低いものが多いとされているが、詳細な情報が十分に存在していなかった。本研究では、広範囲のD-アミノ酸を同時に測定し、ヒト血液で複数の測定可能なD-アミノ酸を同定し、さらには、そのうちのいくつかは動物脳でも測定可能であることを示した。今後は、これらの測定可能な特定のD-アミノ酸に注目した精神疾患の病態解明が進展すると思われる。

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Published: 2023-01-30  

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