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2023 Fiscal Year Final Research Report

Molecular mechanisms to avert motor neurons vulnerability in ALS

Research Project

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Project/Area Number 20H00485
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 46:Neuroscience and related fields
Research InstitutionKeio University

Principal Investigator

Okano Hideyuki  慶應義塾大学, 医学部(信濃町), 教授 (60160694)

Co-Investigator(Kenkyū-buntansha) 矢野 真人  新潟大学, 医歯学系, 准教授 (20445414)
Project Period (FY) 2020-04-01 – 2024-03-31
KeywordsALS / 運動ニューロン / ベイジアンネットワーク解析 / iPS細胞 / RNA結合蛋白質
Outline of Final Research Achievements

We established a novel platform technology, iBRN, “Non- biased” Bayesian gene regulatory network analysis based on induced pluripotent stem cell (iPSC)-derived cell model, to elucidate the molecular etiology using transcriptome of iPSC-derived MNs harboring FUS mutation. iBRN revealed “hub molecules”, which strongly influenced transcriptome network, such as miR-125b-5p-TIMELESS axis and PRKDC for the molecular etiology. And we also obtained 23 small molecule compounds that regulates the abnormal localization of FUS induced by DNA damage/PRKDC inhibition. Furthermore, we succeeded in establishing a cellular model of sporadic ALS in addition to the familial ALS, and revealed that the expression of a group of genes involved in cholesterol biosynthesis in motor neurons is a risk and therapeutic target for ALS.

Free Research Field

神経科学

Academic Significance and Societal Importance of the Research Achievements

RNA結合蛋白質をコードするALSの原因遺伝子FUSやTARDBPに変異を持つiPS細胞株、さらに孤発性ALS患者由来のiPS細胞を樹立し、多くのALS細胞モデルを構築し、細胞ベースの病態解析を行い治療標的となる分子群と分子経路、診断マーカー等を複数見出す事ができた。これらのALS細胞モデルは、今後さらに神経科学領域の基礎研究および治療法の確立に大きく貢献が期待されるものである。また、その分子システムの解明のための方法論として、新たにトランスクリプトーム情報の影響度で疾患の原因を再分類するベイジアンネットワーク解析(iBRNと命名)という有用な方法論を確立できたものと考える。

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Published: 2025-01-30  

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