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MIG‐6 Is Essential for Promoting Glucose Metabolic Reprogramming and Tumor Growth in Triple‐Negative Breast Cancer
Author(s) -
He Jiabei,
Li ChienFeng,
Lee HongJen,
Shin DongHui,
Chern YiJye,
Pereira De Carvalho Bruno,
Chan ChiaHsin
Publication year - 2021
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.2021.35.s1.02251
Subject(s) - triple negative breast cancer , downregulation and upregulation , glut1 , cancer research , reprogramming , biology , breast cancer , glucose uptake , glycolysis , carbohydrate metabolism , cancer , metabolism , endocrinology , biochemistry , gene , genetics , insulin
Treatment of triple‐negative breast cancer (TNBC) remains challenging due to a lack of effective targeted therapies. Dysregulated glucose uptake and metabolism are essential for TNBC growth. Identifying the molecular drivers and mechanisms underlying the metabolic vulnerability of TNBC is key to exploiting dysregulated cancer metabolism for therapeutic applications. Mitogen‐inducible gene‐6 (MIG‐6) has long been thought of as a feedback inhibitor that targets activated EGFR and suppresses the growth of tumors driven by constitutive activated mutant EGFR. Here, our bioinformatics and histological analyses uncovered that MIG‐6 is upregulated in TNBC and that MIG‐6 upregulation is positively correlated with poorer clinical outcomes in TNBC. Metabolic arrays and functional assays revealed that MIG‐6 drives glucose metabolism reprogramming toward glycolysis. Mechanistically, MIG‐6 recruits HAUSP deubiquitinase for stabilizing HIF1α protein expression and the subsequent upregulation of GLUT1 and other HIF1α‐regulated glycolytic genes, substantiating the comprehensive regulation of MIG‐6 in glucose metabolism. Moreover, our animal studies demonstrated that MIG‐6 regulates GLUT1 expression in tumors and subsequent tumor growth in vivo . Collectively, this work reveals that MIG‐6 is a novel prognosis biomarker, metabolism regulator, and molecular driver of TNBC.