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2023 Fiscal Year Final Research Report

Investigation of the brain structural abnormalities in Hoarding Disorder by using diffusionte

Research Project

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Project/Area Number 21K07547
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52030:Psychiatry-related
Research InstitutionKyushu University

Principal Investigator

Nakao Tomohiro  九州大学, 医学研究院, 教授 (50423554)

Co-Investigator(Kenkyū-buntansha) 村山 桂太郎  九州大学, 大学病院, 助教 (20645981)
樋渡 昭雄  名古屋市立大学, 医薬学総合研究院, 教授 (30444855)
豊見山 泰史  九州大学, 医学研究院, 助教 (80893817)
Project Period (FY) 2021-04-01 – 2024-03-31
Keywordsためこみ症 / Hoarding disorder / 安静時機能的脳画像 / rfMRI / 拡張テンソル画像 / diffusion tensor image / TBSS / gyrification
Outline of Final Research Achievements

Tract-based spatial statistics (TBSS) analysis was performed on diffusion tensor image of 25 hoarding patients and 36 healthy controls. Compared to healthy controls, the patients with hoarding showed a decrease in Fractional anisotropy ratio and an increase in Radial diffusivity, and extensive changes in frontal white matter tracts, including frontal corticothalamic circuits, frontoparietal networks, and frontolimbic pathways. The results showed extensive changes in frontal white matter tracts, including frontal cortical thalamic circuits, frontoparietal networks, and frontal limbic pathways. The results of this study may provide useful information for elucidating the biological basis of hoarding syndrome, since cognitive functions of cortical areas connected to frontal white matter tracts have been reported to be dysfunctional in hoarding syndrome.

Free Research Field

精神神経科学

Academic Significance and Societal Importance of the Research Achievements

ためこみ症(HD)は、若年発症後は自然回復せずに慢性化するとされるが、一方で病識の乏しさから受診にはつながりにくい。それにより本邦ではHDに関する疫学調査や生物学的な研究は極めて少ないが、「ごみ屋敷」と呼ばれる社会問題とも深く関係していると考えられ、早期診断と介入、治療のためにも病態の解明が重要である、
今回の研究ではためこみ症の重症度と関連した、健常対照群と有意な差を示す前頭白質路に関する所見が得られ、これはHDで機能障害を認めるとされる領域と構造的にも関連しており、病態解明にむけて新たな知見が得られたと考えている。

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Published: 2025-01-30  

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