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2023 Fiscal Year Final Research Report

Basic research on Kampo formula focusing on inhibition of neuroinflammation for preventive effects on depression

Research Project

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Project/Area Number 21K07376
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52010:General internal medicine-related
Research InstitutionKitasato University

Principal Investigator

Ito Naoki  北里大学, 薬学部, 講師 (00370164)

Project Period (FY) 2021-04-01 – 2024-03-31
Keywords漢方薬 / 香蘇散 / 脳内炎症 / うつ / ミクログリア
Outline of Final Research Achievements

In the recent years, in addition to stress and aging, the occurrence of infection has become a clinical issue due to its involvement in the onset and exacerbation of mental disorders. Using the isolation stress-loaded senescence-accelerated model mice and LPS-induced pseudo-infection model mice, this study demonstrated that repeated pretreatment with nobiletin-rich kososan, a Kampo formula, prevents the onset of depression and neuroinflammation, presumably mediated by the increase in the population of anti-inflammatory microglia in the hippocampus. These findings suggest that the enhanced population of anti-inflammatory microglia may be effective in preventing depression associated with stress, aging, and infection. It is also expected that this will contribute to future research aimed at elucidating the molecular mechanisms involved in the prevention of depression.

Free Research Field

漢方薬理学、精神医学

Academic Significance and Societal Importance of the Research Achievements

うつ病などの精神疾患の罹患率は年々増加の一途を辿っており、その克服は急務の課題となっている。最近ではコロナ後遺症の一つにうつも含まれるなど、感染症もストレスや老化と同様にうつ病のリスクファクター認識されつつある。本研究では、ストレスや老化、感染症に伴ううつに対して、漢方薬の事前投与がその発症を防ぐ可能性を複数のモデルマウスで示し、そのメカニズムの一つに抗炎症型ミクログリアの増強による脳内炎症の抑制が関与することを明らかにした。この成果は、漢方薬を利用することによってうつの予防が可能であることを示唆しているのみならず、うつ予防戦略における新たなターゲット分子の解明に繋がることが期待される。

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Published: 2025-01-30  

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