C-terminal BRE inhibits cellular proliferation and increases sensitivity to chemotherapeutic drugs of MLL-AF9 acute myeloid leukemia cells
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AbstractBRE (Brain and Reproductive Organ-Expressed) is an anti-apoptotic protein and a core component of DNA-repair BRCA1-A complex. Microarray-detected high BRE gene expression has been found to be associated with better patient survival in AML (acute myeloid leukemia) with MLL-AF9 translocation, and radiotherapy-treated non-familial breast cancer. A recent finding suggests that the high BRE gene expression in MLL-AF9 AML could be attributed to the additional expression of a transcript variant encoding a novel C-terminal BRE isoform. Using THP-1 as the MLL-AF9 AML cell model, we found that ectopic expression of the C-terminal BRE, which could not form an intact BRCA1-A complex, indeed increased cellular sensitivity to chemotherapeutic drugs and inhibited cell proliferation, while the complete opposite was achieved by the ectopic expression of full-length BRE. Our findings suggest that the C-terminal BRE-encoding transcript could be responsible for better patient survival and may have therapeutic potential for cancer.
Acceptance Date27/04/2019
All Author(s) ListPun CC, Lee KK, Chui YL
Journal nameLeukemia & Lymphoma
Year2019
ISSN1042-8194
LanguagesEnglish-United States
KeywordsAcute myeloid leukemia,BRE,BRCA1-A complex,C-terminal BRE,MLL-AF9 AML

Last updated on 2020-30-05 at 02:41