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2021 Fiscal Year Final Research Report

Identification and analysis of novel mTOR-interacting protein

Research Project

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Project/Area Number 18K06478
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 46010:Neuroscience-general-related
Research InstitutionThe University of Tokyo

Principal Investigator

Kassai Hidetoshi  東京大学, 大学院医学系研究科(医学部), 准教授 (40403232)

Project Period (FY) 2018-04-01 – 2022-03-31
KeywordsmTOR / Flightless-I / knockout mice
Outline of Final Research Achievements

In this study, I analyzed mTOR protein complex extracted from the mouse cerebral cortex by mass spectrometry, and identified the novel mTOR-interacting protein, Flightless-I (Flii). Flii is known as the cytoskeleton-regulating protein, but little is known about its function in the central nervous system.
We generated dorsal telencephalon-specific Flii conditional knockout mice (Flii cKO) by CRISPR/Cas9 system. The histological analysis revealed the atrophy of the cerebral cortex in Flii cKO mice, probably due to the apoptotic cell death of cortical progenitor cells during embryonic period. These phenotypes were also observed in the transgenic mice expressing active mTOR in the dorsal telencephalon. Therefore, Flii involved in the brain development, and may have relationship with the mTOR signaling.

Free Research Field

分子生物学

Academic Significance and Societal Importance of the Research Achievements

mTORシグナルは、がんや結節性硬化症、自閉症、神経編疾患など、ヒトの多様な疾患に深く関与していることが知られており、その発症メカニズムや治療法が深く研究されている分野である。本研究では大脳皮質における新規のmTOR 相互作用因子として同定されたFliiの機機能解析を遺伝子改変マウスを用いて行った。Fliiノックアウトマウスの表現型は、mTORシグナルが過剰に活性化したマウスと類似している。このことから、学術的にはこれまで十分明らかではなかった神経系におけるmTORシグナルの機能に迫ることができ、社会的にはヒトの疾患のメカニズムの解明や治療戦略に寄与できると考えられる。

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Published: 2023-01-30  

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