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Abstract
Idiopathic pulmonary fibrosis (IPF) causes remodeling of the distal lung. Pulmonary remodeling is histologically characterized by fibrosis, as well as appearance of basal cells; however, the involvement of basal cells in IPF remains unclear. Here, we focus on the long noncoding RNA MIR205HG, which is highly expressed in basal cells, using RNA sequencing. Through RNA sequencing of genetic manipulations using primary cells and organoids, we discovered that MIR205HG regulates IL-33 expression. Mechanistically, the AluJb element of MIR205HG plays a key role in IL-33 expression. Additionally, we identified a small molecule that targets the AluJb element, leading to decreased IL-33 expression. IL-33 is known to induce type 2 innate lymphoid cells (ILC2s), and we observed that MIR205HG expression was positively correlated with the number of ILC2s in patients with IPF. Collectively, these findings provide insights into the mechanisms by which basal cells contribute to IPF and suggest potential therapeutic targets.
Authors
Tsuyoshi Takashima, Chao Zeng, Eitaro Murakami, Naoko Fujiwara, Masaharu Kohara, Hideki Nagata, Zhaozu Feng, Ayako Sugai, Yasue Harada, Rika Ichijo, Daisuke Okuzaki, Satoshi Nojima, Takahiro Matsui, Yasushi Shintani, Gota Kawai, Michiaki Hamada, Tetsuro Hirose, Kazuhiko Nakatani, Eiichi Morii
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