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2022 Fiscal Year Final Research Report

Elucidating the involvement of the immune checkpoint molecule PD-1/PD-L1 pathway in Sjogren's syndrome using salivary gland organoids

Research Project

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Project/Area Number 20K18464
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 57010:Oral biological science-related
Research InstitutionShowa University

Principal Investigator

Kujiraoka Satoko  昭和大学, 歯学部, 助教 (90824673)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywordsオルガノイド / 唾液腺オルガノイド / 自己免疫疾患 / シェーグレン症候群 / PD-1/PD-L1 / iPS細胞 / 唾液腺組織障害
Outline of Final Research Achievements

The aim of this study is to elucidate the pathogenesis of Sjogren’s syndrome using salivary gland organoids (mini-organs with morphology and function similar to salivary glands) generated by introducing PD-1/PD-L1 gene into iPS cells deriver from model mice (NOD mice; show Sjogren’s syndrome like pathological condition) .
In the first year of this research, I established iPS cells deriver from wildtype mice. In the second to third year, I attempted to induce salivary gland organoids under conditions without feeder cells. At this time, I have not been able to determine the probability of efficient salivary gland organoid induction conditions with feeder cells removed, however I am still investigating the method of inducing differentiation of the organoids with feeder cells removed.

Free Research Field

口腔病理

Academic Significance and Societal Importance of the Research Achievements

シェーグレン症候群(以下、SS)は唾液腺や涙腺などの外分泌腺に慢性炎症を伴う自己免疫疾患であり、本邦では約7万人の患者がいると考えられている。SSではドライマウスやドライアイを生じることで、患者のQOL低下は避けられない。現在のSSの治療法は人工唾液や唾液分泌促進薬などの対処療法が主体であり、根治療法の開発が急務である。本研究では唾液腺オルガノイド(唾液腺同様の形態・機能を有するミニ臓器。以下、SGO)作製技術を応用し、SSの病態解明を行うことを目的とした。現時点ではSGO作製のより良い条件を検討している段階だが、本研究の結果は、SS病態解明の一助となると考えられ、今後も研究を継続する。

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Published: 2024-01-30  

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