protac brd4 degrader 15

PROTAC BRD4 Degrader-15 is a chemical compound consisting of a PROteolysis TArgeting Chimera (PROTAC) linked to ligands specific to von Hippel-Lindau and BRD4. It exhibits an IC50 of 7.2 nM for BRD4 BD1 and 8.1 nM for BRD4 BD2 and demonstrates potent degradation activity against the BRD4 protein in PC3 prostate cancer cells.

PROTAC BRD2/BRD4 degrader-1 (compound 15) is a potent, selective degrader of BET proteins BRD4 and BRD2, achieving rapid, reversible, and unexpectedly selective elimination compared to BRD3. It effectively suppresses solid tumors with minimal cytotoxic effects and comprises a BET inhibitor, a connecting linker, and thalidomide as the ligand for cereblon (CRBN)/cullin 4A[1].

AB3067 is a PROTAC degrader targeting BET protein, efficiently recruiting two distinct E3 ligases, Cereblon and VHL, with strong affinity (demonstrated by IC50 values of 559 nM for VHL and 190 nM for CRBN in vivo HEK293). It degrades BRD2, BRD3, BRD4, and CRBN with DC50 values of 2.1~2.3, 1.6, 15, and 75 nM, respectively. Additionally, AB3067 inhibits the proliferation of RKO cells, with an EC50 of 111 nM. (Pink: ligand for target protein; Black: linker; Blue: ligand for E3 ligase VHL and CRBN)

PROTAC BET Degrader-15 is a BET PROTAC degrader, with DC50 values of less than 0.10 nM, less than 0.01 nM, and less than 0.01 nM for BRD2, BRD3, and BRD4 respectively. It induces significant G2/M phase cell cycle arrest and triggers apoptosis. Additionally, PROTAC BET Degrader-15 leads to notable downregulation of c-Myc, while upregulating cell cycle inhibitor p21, downregulating CDK6, and increasing the apoptosis marker cleaved PARP. This compound is applicable to the study of hematologic malignancies and lung cancer.