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Recent research has spotlighted the significance of Musashi2 (MSI2) in cancer biology. In this study, we first demonstrated that MSI2 plays a key function in regulating the radiosensitivity of lung cancer. The expression of MSI2 is negatively correlated with overall survival in cancer patients, and the knockdown of MSI2 inhibits tumorigenesis and increases radiosensitivity of lung cancer cells. Cellular radiosensitivity, which is closely linked to DNA damage, is influenced by MSI2 interaction with ataxia telangiectasia mutated and Rad3\u2010related kinase (ATR) and checkpoint kinase 1 (CHK1) post\u2010irradiation; moreover, knockdown of MSI2 inhibits the ATR\u2010mediated DNA damage response pathway. RNA\u2010binding motif protein 17 (RBM17), which is implicated in DNA damage repair, exhibits increased interaction with MSI2 post\u2010irradiation. We found that knockdown of RBM17 disrupted the interaction between MSI2 and ATR post\u2010irradiation and increased the radiosensitivity of lung cancer cells. Furthermore, we revealed the potential mechanism of MSI2 recruitment into the nucleus with the assistance of RBM17 to activate ATR to promote radioresistance. This study provides novel insights into the potential application of MSI2 as a new target in lung cancer radiotherapy.<\/jats:p>","DOI":"10.1002\/mco2.548","type":"journal-article","created":{"date-parts":[[2024,4,21]],"date-time":"2024-04-21T18:08:15Z","timestamp":1713722895000},"source":"Crossref","is-referenced-by-count":4,"title":["Mechanism of Musashi2 affecting radiosensitivity of lung cancer by modulating DNA damage repair"],"prefix":"10.1002","volume":"5","author":[{"given":"Hongjin","family":"Qu","sequence":"first","affiliation":[{"name":"Department of Radiation Medicine Faculty of Naval Medicine Naval Medical University  Shanghai China"},{"name":"Key Laboratory of Systems Biomedicine (Ministry of Education) Shanghai Center for Systems Biomedicine Shanghai Jiao Tong University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiong","family":"Shi","sequence":"additional","affiliation":[{"name":"Shanghai Engineering Research Center of Tooth 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