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2022 Fiscal Year Final Research Report

Development of conservative therapy in osteoclast mediated cholesteatoma bone destruction.

Research Project

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Project/Area Number 19K09844
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56050:Otorhinolaryngology-related
Research InstitutionOsaka University

Principal Investigator

Oshima Kazuo  大阪大学, 大学院医学系研究科, 招へい教員 (80832930)

Co-Investigator(Kenkyū-buntansha) 太田 有美  大阪大学, 大学院医学系研究科, 講師 (00598401)
佐藤 崇  大阪大学, 大学院医学系研究科, 助教 (30756002)
今井 貴夫  奈良県立医科大学, 医学部, 非常勤講師 (80570663)
Project Period (FY) 2019-04-01 – 2023-03-31
Keywords中耳真珠腫 / 骨破壊 / 破骨細胞
Outline of Final Research Achievements

We performed single cell RNA-seq in human cholesteatoma and identified a subset of cholesteatoma fibroblasts that highly expressing inhibin βA (INHBA). Next, we confirmed that activin A, a dimer of INHBA, promotes osteoclast differentiation in vitro, and the deletion of INHBA in fibroblasts reduced osteoclast differentiation in cholesteatoma murine model. These findings suggest that activin A-producing fibroblasts cause bone destruction by inducing local osteoclast differentiation and may be a potential therapeutic target.

Free Research Field

耳科学

Academic Significance and Societal Importance of the Research Achievements

中耳真珠腫は近接する側頭骨やその内部構造物を溶解しながら進展しする炎症性の疾患だが、骨破壊の機序は明らかになっていない。唯一の治療は外科的な切除だが、未だに有効な保存的治療手段はない。今回、我々は真珠腫線維芽細胞によって局所的な破骨細胞分化が誘導されることを明らかにし、線維芽細胞が保存的治療のターゲットになり得ることを示した。

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Published: 2024-01-30  

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