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Shimizu, Kotaro; Kikuta, Junichi; Ohta, Yumi; Uchida, Yutaka; Miyamoto, Yu; Morimoto, Akito; Yari, Shinya; Sato, Takashi; Kamakura, Takefumi; Oshima, Kazuo; Imai, Ryusuke; Liu, Yu-Chen; Okuzaki, Daisuke; Hara, Tetsuya; Motooka, Daisuke; Emoto, Noriaki; Inohara, Hidenori; Ishii, Masaru
Nature communications, 08/2023, Letnik: 14, Številka: 1Journal Article
Cholesteatoma, which potentially results from tympanic membrane retraction, is characterized by intractable local bone erosion and subsequent hearing loss and brain abscess formation. However, the pathophysiological mechanisms underlying bone destruction remain elusive. Here, we performed a single-cell RNA sequencing analysis on human cholesteatoma samples and identify a pathogenic fibroblast subset characterized by abundant expression of inhibin βA. We demonstrate that activin A, a homodimer of inhibin βA, promotes osteoclast differentiation. Furthermore, the deletion of inhibin βA /activin A in these fibroblasts results in decreased osteoclast differentiation in a murine model of cholesteatoma. Moreover, follistatin, an antagonist of activin A, reduces osteoclastogenesis and resultant bone erosion in cholesteatoma. Collectively, these findings indicate that unique activin A-producing fibroblasts present in human cholesteatoma tissues are accountable for bone destruction via the induction of local osteoclastogenesis, suggesting a potential therapeutic target.
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in: SICRIS
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