GSK 525762C

Molibresib besylate (GSK 525762C; I-BET 762 besylate) is an orally active pan-BET inhibitor that targets and binds to BRD2, BRD3, BRD4 and BRDT. By competitively occupying acetylated lysine binding sites, Molibresib besylate disrupts the interaction between BET proteins and chromatin, thereby effectively inhibiting MYC expression and target gene transcription. Molibresib besylate exhibits broad antiproliferative activity, which not only inhibits cancer cell growth and induces growth arrest, but also downregulates mitosis-related genes and upregulates the level of p-ERK1/2. When combined with MEK inhibitors, Molibresib besylate shows a significant synergistic effect, reduces tumor burden in mouse models of leukemia, modulates the immune microenvironment and prolongs survival. Molibresib besylate is widely applicable to research related to acute myeloid leukemia, multiple myeloma, triple-negative breast cancer, small-cell lung cancer and various advanced refractory solid tumors .