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As a highly malignant tumour, malignant rhabdoid tumours of the kidney (MRTK) are prone to metastasis and invasion, while tumour metastasis and invasion are inseparable from matrix metalloproteinases (MMPs) and epithelial\u2010mesenchymal transformation (EMT). Moreover, the key to EMT is remodelling of the cytoskeleton. Therefore, our study is aimed at investigating whether doxycycline hydrochloride (DCH), an inhibitor of MMPs, could reverse EMT in MRTK to exert an antitumour effect by regulating MMPs and the cytoskeleton. <jats:italic>Methods<\/jats:italic>. The existence of EMT in MRTK cells was verified by bioinformatics analysis, immunofluorescence, and western blotting (WB). <jats:italic>In vitro<\/jats:italic>, the proliferation, migration, and invasion abilities of G401 cells were examined by Cell Counting Kit\u20108 (CCK\u20108), scratch, and Transwell assays, respectively. The effect of DCH on tumour growth in tumour\u2010bearing mice was explored in <jats:italic>in vivo<\/jats:italic> experiments, and the expression of MMP2 and MMP9 and EMT correlation indexes was measured by immunofluorescence and WB, and the changes in cytoskeletal F\u2010actin and <jats:italic>\u03b2<\/jats:italic>\u2010tubulin were measured by fluorescence. <jats:italic>Results<\/jats:italic>. The altered extracellular matrix (ECM) composition, EMT, and high expression of MMP2 and MMP9 existed in MRTK. DCH inhibited the proliferation, migration, and invasion of G401 cells <jats:italic>in vitro. In vivo<\/jats:italic>, DCH inhibited tumour growth in mice, downregulated the expression of MMP2 and MMP9, and partially reversed EMT. Alternatively, DCH resulted in cytoskeletal rearrangements of G401 cells. <jats:italic>Conclusions<\/jats:italic>. DCH, as an MMP inhibitor, is used for the first time in MRTK research, showing good antitumour effects by reversing EMT and potentially providing new therapeutic measures for MRTK treatment.<\/jats:p>","DOI":"10.1155\/2022\/2760744","type":"journal-article","created":{"date-parts":[[2022,11,13]],"date-time":"2022-11-13T08:15:38Z","timestamp":1668327338000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Doxycycline Hydrochloride Regulates Cytoskeletal Rearrangement and Epithelial\u2010To\u2010Mesenchymal Transition in Malignant Rhabdoid Tumour of the Kidney"],"prefix":"10.1155","volume":"2022","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6421-767X","authenticated-orcid":false,"given":"Chenghao","family":"Zhanghuang","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhaoxia","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tao","family":"Mi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jinkui","family":"Wang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Liming","family":"Jin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiayan","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maoxian","family":"Li","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mujie","family":"Li","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xin","family":"Wu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhang","family":"Wang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1695-5886","authenticated-orcid":false,"given":"Dawei","family":"He","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2022,11,9]]},"reference":[{"key":"e_1_2_13_1_2","doi-asserted-by":"publisher","DOI":"10.1002\/1097-0142(197805)41:5<1937::AID-CNCR2820410538>3.0.CO;2-U"},{"key":"e_1_2_13_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-3468(86)80502-4"},{"key":"e_1_2_13_3_2","first-page":"766","article-title":"Treatment of Wilms' tumour. 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