ARV-771 is an effective BET degrader based on PROTAC technology. The Kd for BRD2(1), BRD2(2), BRD3(1), BRD3(2), BRD4(1) and BRD4(2) are 34 and 4.7 respectively. , 8.3, 7.6, 9.6 and 7.6 nM.

BRD3(1):8.3 nM (Kd), BRD2(1):34 nM (Kd), BRD4(2):7.6 nM (Kd), BRD4(1):9.6 nM (Kd), BRD2(2):4.7 nM (Kd), BRD3(2):7.6 nM (Kd)

METHODS: ARV-771 (0.01/0.025/0.05/0.1/0.25/0.5/1/2μM) was used to culture Hep3B, HepG and HCCLM3 cells to observe whether ARV-771 inhibits the growth of these cancer cells.
RESULTS ARV-771 had a dose-dependent inhibition on cancer cell viability when the concentration reached 0.25 μM in Hep3B and HepG2 cells and 0.5 μM in HCCLM3 cells. [1]

METHODS: Nude mice successfully bearing transplanted HepG2 cell tumors were randomly divided into two groups and treated with ARV-771 (20 mg/kg/day, subcutaneous injection) every other day for 25 days. Tumor volume and body weight of mice were measured every 5 days. Immediately after extraction of xenografts from mice, tumor weight was measured by an electronic balance.
RESULTS After ARV-771 treatment, tumor volume and tumor weight were significantly reduced. Immunochemical detection results showed that ARV-771 reduced the expression of Ki67 and increased the expression of cleaved Caspase 3 in xenograft tissues. [1]