Abstract:
:Tripartite motif 24 protein (TRIM24) is a plant homeodomain/bromodomain histone reader, recently associated with poor overall survival of breast-cancer patients. At a molecular level, TRIM24 is a negative regulator of p53 levels and a co-activator of estrogen receptor. However, the role of TRIM24 in breast tumorigenesis remains largely unknown. We used an isogenic human mammary epithelial cell (HMEC) culture model, derived from reduction mammoplasty tissue, and found that ectopic expression of TRIM24 in immortalized HMECs (TRIM24 iHMECs) greatly increased cellular proliferation and induced malignant transformation. Subcutaneous injection of TRIM24 iHMECs in nude mice led to growth of intermediate to high-grade tumors in 60-70% of mice. Molecular analysis of TRIM24 iHMECs revealed a glycolytic and tricarboxylic acid cycle gene signature, alongside increased glucose uptake and activated aerobic glycolysis. Collectively, these results identify a role for TRIM24 in breast tumorigenesis through reprogramming of glucose metabolism in HMECs, further supporting TRIM24 as a viable therapeutic target in breast cancer.
journal_name
Oncogenejournal_title
Oncogeneauthors
Pathiraja TN,Thakkar KN,Jiang S,Stratton S,Liu Z,Gagea M,Shi X,Shah PK,Phan L,Lee MH,Andersen J,Stampfer M,Barton MCdoi
10.1038/onc.2014.220subject
Has Abstractpub_date
2015-05-28 00:00:00pages
2836-45issue
22eissn
0950-9232issn
1476-5594pii
onc2014220journal_volume
34pub_type
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