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2021 Fiscal Year Final Research Report

Genetical and pathological study of neuronal intranuclear inclusion disease

Research Project

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Project/Area Number 19H03577
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 52020:Neurology-related
Research InstitutionAichi Medical University (2021)
National Hospital Organization Suzuka National Hospital (2019-2020)

Principal Investigator

Sone Jun  愛知医科大学, 付置研究所, 講師 (40513750)

Co-Investigator(Kenkyū-buntansha) 田中 章景  横浜市立大学, 医学研究科, 教授 (30378012)
吉田 眞理  愛知医科大学, 付置研究所, 特命研究教授 (60288545)
松本 直通  横浜市立大学, 医学研究科, 教授 (80325638)
Project Period (FY) 2019-04-01 – 2022-03-31
KeywordsNOTCH2NLC / GGCリピート / NIID
Outline of Final Research Achievements

As a result of analysis with a long-read next-generation sequencer, the GGC repeat sequence of the NOTCH2NLC gene on chromosome 1 was expanded only in NIID patients, and within the area that the result of linkage analysis showed a high LOD score. From this, we concluded and announced that the expamsion of the GGC repeat sequence of the NOTCH2NLC gene is the cause of NIID.
Furthermore, in collaboration with the IGBMC Institute in France, we created a model mouse that highly expresses polyglycine protein, which is synthesized by extending the GGC repeat sequence of the NOTCH2NLC gene, and these mice present pathological change and symptoms such as motor dysfunction. It was clarified that pathological change of NIID occurred by polyglycine protain, and a paper was published.

Free Research Field

臨床神経学、神経遺伝学、神経病理学

Academic Significance and Societal Importance of the Research Achievements

NIIDの原因が、NOTCH2NLC遺伝子のGGCリピート配列の延長があると解明されたことにより、遺伝子検査によってもNIIDが診断可能となった。これに伴って、NIIDの診断基準作成に大きく貢献できることとなった。現在、厚生労働省の研究班では、実際にNOTCH2NLC遺伝子のGGCリピート配列の延長を検討することが組み込まれた形での診断基準作成が進んでいる。
また、NOTCH2NLC遺伝子のGGCリピート配列の延長が、NIIDの原因であることが判明したため、その分子病態を解明を進めることができる様になり、現在、分子生物学的および病理学的な解析を進めている。

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Published: 2023-01-30   Modified: 2025-01-30  

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