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2022 Fiscal Year Final Research Report

Elucidation of the role of selenoproteinP in disturbance of selenium homeostasis in Parkinson's disease.

Research Project

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Project/Area Number 21K20707
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0801:Pharmaceutical sciences and related fields
Research InstitutionTohoku University

Principal Investigator

Kaneko Takayuki  東北大学, 薬学研究科, 助手 (20907993)

Project Period (FY) 2021-08-30 – 2023-03-31
Keywordsパーキンソン病 / セレノプロテインP / セレン / 神経変性疾患
Outline of Final Research Achievements

In this study, we investigated the role of Selenoprotein P in the pathogenesis of Parkinson's disease. In an in vitro experimental system without cells, we found that Selenoprotein P inhibits the formation of αSynuclein fibrils induced by αSynuclein. On the other hand, in cultured cells, we established a tetracycline-inducible αSynuclein-expressing cell line and constructed an evaluation system for αSynuclein aggregation formation in the cell culture system by protein transfection of αSynuclein fibrils. Supplying selenium through SeP or selenite in this experimental system resulted in the suppression of accelerated αSynuclein fibril formation within the cells, suggesting that selenium supplementation may have some inhibitory effect on αSynuclein aggregation formation.

Free Research Field

神経科学

Academic Significance and Societal Importance of the Research Achievements

振戦や認知機能の低下などを主症状とするパーキンソン病(PD)患者脳では、αSyncleinを中心とするタンパク質凝集体であるレビー小体が形成される。本研究では、セレン運搬タンパク質であるセレノプロテインP (SeP) によるPD病態形成への寄与を明らかにすることを目的とした。試験管内および培養細胞をもちいた実験系において、セレノプロテインPは、セレン供給作用およびαSynucleinとの直接的な相互作用を介してαSynucleinの凝集形成を抑制する可能性を見出した。本成果で得られた、パーキンソン病態におけるセレン恒常性を理解することで、魅力的な治療ターゲットへとつながることが期待される。

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Published: 2024-01-30  

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