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BRD = BROMODOMAIN PROTEINS

 
 
 

The BET (Bromodomain and Extra-Terminal) family of transcription factors includes the bromodomain-containing proteins BRD2, BRD3, BRD4, and BRDT.

BRD proteins associate with acelylated lysine residues on histones in gene promoters and enhancers to recruit transcriptional complexes that regulate the expression of target genes.

BRD targets include genes involved in lineage determination, cellular growth, and survival and inflammation that play important roles in the development and progression of cancer. These genes include C-MYC, MLL, BCL2, cyclin D, IL6, and GLI1.

BRD4 is required for expression of the C-MYC oncogene that is deregulated in many cancers and drives cellular growth and proliferation.

BRDs regulate the activity of other cancer-associated DNA-binding transcription factors including the androgen receptor and NF-κB.

In tumor cells, the inhibition of BRDs may offer a potential avenue to curbing the overexpression and activity of C-MUC and other transcription factors, thereby altering transcriptional networks that are deregulated in cancer.

Incyte is developing inhibitors of BET BRD proteins.

The Bromodomain and extraterminal domain or BET proteins are epigenetic readers that associate with acetylated histones to regulate gene transcription. BRD4 is required for expression of the c-MYC oncogene that is deregulated in many cancers.

This unique mechanism of action has been shown to be highly complementary with other agents including JAK inhibitors in preclinical studies, as c-MYC and BCL-2 are critical for tumor cell proliferation and survival.

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