| Structural highlights
Disease
[BRD4_HUMAN] Note=A chromosomal aberration involving BRD4 is found in a rare, aggressive, and lethal carcinoma arising in midline organs of young people. Translocation t(15;19)(q14;p13) with NUT which produces a BRD4-NUT fusion protein.[1] [2]
Function
[BRD4_HUMAN] Plays a role in a process governing chromosomal dynamics during mitosis (By similarity).
Publication Abstract from PubMed
BRD4 assembles transcriptional machinery at gene super-enhancer regions and governs the expression of genes that are critical for cancer progression. However, it remains unclear whether BRD4-mediated gene transcription is required for tumor cells to develop drug resistance. Our data show that prolonged treatment of luminal breast cancer cells with AKT inhibitors induces FOXO3a dephosphorylation, nuclear translocation, and disrupts its association with SirT6, eventually leading to FOXO3a acetylation as well as BRD4 recognition. Acetylated FOXO3a recognizes the BD2 domain of BRD4, recruits the BRD4/RNAPII complex to the CDK6 gene promoter, and induces its transcription. Pharmacological inhibition of either BRD4/FOXO3a association or CDK6 significantly overcomes the resistance of luminal breast cancer cells to AKT inhibitors in vitro and in vivo. Our study reports the involvement of BRD4/FOXO3a/CDK6 axis in AKTi resistance and provides potential therapeutic strategies for treating resistant breast cancer.
Targeting the BRD4/FOXO3a/CDK6 axis sensitizes AKT inhibition in luminal breast cancer.,Liu J, Duan Z, Guo W, Zeng L, Wu Y, Chen Y, Tai F, Wang Y, Lin Y, Zhang Q, He Y, Deng J, Stewart RL, Wang C, Lin PC, Ghaffari S, Evers BM, Liu S, Zhou MM, Zhou BP, Shi J Nat Commun. 2018 Dec 5;9(1):5200. doi: 10.1038/s41467-018-07258-y. PMID:30518851[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ French CA, Miyoshi I, Kubonishi I, Grier HE, Perez-Atayde AR, Fletcher JA. BRD4-NUT fusion oncogene: a novel mechanism in aggressive carcinoma. Cancer Res. 2003 Jan 15;63(2):304-7. PMID:12543779
- ↑ French CA, Miyoshi I, Aster JC, Kubonishi I, Kroll TG, Dal Cin P, Vargas SO, Perez-Atayde AR, Fletcher JA. BRD4 bromodomain gene rearrangement in aggressive carcinoma with translocation t(15;19). Am J Pathol. 2001 Dec;159(6):1987-92. PMID:11733348 doi:10.1016/S0002-9440(10)63049-0
- ↑ Liu J, Duan Z, Guo W, Zeng L, Wu Y, Chen Y, Tai F, Wang Y, Lin Y, Zhang Q, He Y, Deng J, Stewart RL, Wang C, Lin PC, Ghaffari S, Evers BM, Liu S, Zhou MM, Zhou BP, Shi J. Targeting the BRD4/FOXO3a/CDK6 axis sensitizes AKT inhibition in luminal breast cancer. Nat Commun. 2018 Dec 5;9(1):5200. doi: 10.1038/s41467-018-07258-y. PMID:30518851 doi:http://dx.doi.org/10.1038/s41467-018-07258-y
|
