{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T16:52:04Z","timestamp":1790268724839,"version":"4.1.0"},"reference-count":38,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2024,1,22]],"date-time":"2024-01-22T00:00:00Z","timestamp":1705881600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Molecular Carcinogenesis"],"published-print":{"date-parts":[[2024,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The histone variant, macroH2A (mH2A) influences gene expression through epigenetic regulation. Tumor suppressive function of mH2A isoforms has been reported in various cancer types, but few studies have investigated the functional role of mH2A2 in breast cancer pathophysiology. This study aimed to determine the significance of mH2A2 in breast cancer development and progression by exploring its downstream regulatory mechanisms. Knockdown of mH2A2 facilitated the migration and invasion of breast cancer cells, whereas its overexpression exhibited the opposite effect. In vivo experiments revealed that augmenting mH2A2 expression reduced tumor growth and lung metastasis. Microarray analysis showed that TM4SF1 emerged as a likely target linked to mH2A2 owing to its significant suppression in breast cancer cell lines where mH2A2 was overexpressed among the genes that exhibited over twofold upregulation upon mH2A2 knockdown. Suppressing TM4SF1 reduced the migration, invasion, tumor growth, and metastasis of breast cancer cells in vitro and in vivo. TM4SF1 depletion reversed the increased aggressiveness triggered by mH2A2 knockdown, suggesting a close interplay between mH2A2 and TM4SF1. Our findings also highlight the role of the mH2A2\/TM4SF1 axis in activating the AKT\/NF\u2010\u03baB pathway. Consequently, activated NF\u2010\u03baB signaling leads to increased expression and secretion of MMP13, a potent promoter of metastasis. In summary, we propose that the orchestrated regulation of the mH2A2\/TM4SF1 axis in conjunction with the AKT\/NF\u2010\u03baB pathway and the subsequent elevation in MMP13 expression constitute pivotal factors governing the malignancy of breast cancer.<\/jats:p>","DOI":"10.1002\/mc.23683","type":"journal-article","created":{"date-parts":[[2024,1,22]],"date-time":"2024-01-22T13:36:15Z","timestamp":1705930575000},"page":"714-727","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Breast cancer malignancy is governed by regulation of the macroH2A2\/TM4SF1 axis, the AKT\/NF\u2010\u03baB pathway, and elevated MMP13 expression"],"prefix":"10.1002","volume":"63","author":[{"given":"Yunho","family":"Jin","sequence":"first","affiliation":[{"name":"Research Center Dongnam Institute of Radiological &amp; Medical Sciences (DIRAMS) Busan Republic of 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