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2023 Fiscal Year Final Research Report

MR analysis of brain parenchymal CSF flow disturbance in neurodegenerative diseases accompanying with normal pressure hydrocephalus

Research Project

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Project/Area Number 20K08068
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionNational Center of Neurology and Psychiatry

Principal Investigator

Sato Noriko  国立研究開発法人国立精神・神経医療研究センター, 病院 放射線診療部, 部長 (10322017)

Project Period (FY) 2020-04-01 – 2024-03-31
KeywordsMRI / 神経変性疾患 / glymphatic system
Outline of Final Research Achievements

In patients with corticobasal degeneration and Parkinson's disease, antemortem brain MRIs showed normal-pressure hydrocephalus, but postmortem brain MRI showed that the findings disappeared. Premortem MRI studies have shown that, in patients with Alzheimer's disease, a negative correlation was observed between amyloid/tau deposition and the ALPS index, which is an index of cerebral interstitial fluid flow, in the temporal and parietal lobes. And a positive correlation was observed between the choroid plexus volume and amyloid/tau deposition. In patients with progressive supranuclear palsy, a positive correlation was observed between the ALPS index and brainstem white matter volume. Therefore, it has been speculated that amyloid/tau, etc. deposition in the brain causing choroid plexus swelling and impeding the flow of brain interstitial fluid, leading to enlargement of the ventricles.

Free Research Field

神経放射線

Academic Significance and Societal Importance of the Research Achievements

神経変性疾患におけるPET分子イメージングは、直接脳内沈着物を描出できるため、現在最も診断に有効な検査とされている。しかし一部の患者に対してしか保険適応にもなっておらず、研究ベースで高額な費用がかかり、一般の患者は享受できない現状である。一方MRIはより安価で多くの施設で試行可能である。かつMR撮像法と解析手法の進歩は目覚ましく、分子レベルの異常を指摘出るようになっている。今回の我々の研究はMRIを用いた神経変性疾患の病態解明に貢献したのと同時に、MRIとPETデータとの相関を示し、MRIの有効性をも示した。この研究を発展させれば、将来医療費の削減や早期診断、発症予防への貢献が期待される。

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Published: 2025-01-30  

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