cancers Article Epigenetic Upregulation of MAGE-A Isoforms Promotes Breast Cancer Cell Aggressiveness Chaeun Oh 1,† , Hwa-Ryeon Kim 2,†, Sumin Oh 1,3, Je Yeong Ko 4, Yesol Kim 4, Keunsoo Kang 5 , Young Yang 4 , Jongmin Kim 4 , Jong Hoon Park 4, Jae-Seok Roe 2,* and Kyung Hyun Yoo 1,3,* 1 Laboratory of Biomedical Genomics, Department of Biological Sciences, Sookmyung Women’s University, Seoul 04310, Korea;
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[email protected] (J.H.P.) 5 Department of Microbiology, College of Science & Technology, Dankook University, Cheonan 31116, Korea;
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[email protected] (K.H.Y.); Tel.: +82-2-2123-2700 (J.-S.R.); +82-2-2077-7836 (K.H.Y.) † These authors contributed equally to the work. Simple Summary: Breast cancer is a heterogeneous disease that has complex causes and mechanisms of development. Currently, patient treatment options depend on the breast cancer molecular subtype, which is classified based on the presence or absence of hormone receptors and HER2. However, this Citation: Oh, C.; Kim, H.-R.; Oh, S.; classification system has limitations in terms of predicting responsiveness to anticancer drugs and Ko, J.Y.; Kim, Y.; Kang, K.; Yang, Y.; patient outcomes.