BI-882370

• CAT Number: I011846
• CAS Number: 1392429-79-6
• Molecular Formula: C28H33F2N7O2S
• Molecular Weight: 569.67
• Purity: ≥95%
• Synonyms: N-[3-[5-[(1-ethylpiperidin-4-yl)-methylamino]-3-pyrimidin-5-ylpyrrolo[3,2-b]pyridin-1-yl]-2,4-difluorophenyl]propane-1-sulfonamide
• InChI: InChI=1S/C28H33F2N7O2S/c1-4-14-40(38,39)34-23-7-6-22(29)28(26(23)30)37-17-21(19-15-31-18-32-16-19)27-24(37)8-9-25(33-27)35(3)20-10-12-36(5-2)13-11-20/h6-9,15-18,20,34H,4-5,10-14H2,1-3H3
• InChIKey: AEJACXAFHXBVHF-UHFFFAOYSA-N
• SMILES: CCCS(=O)(=O)NC1=C(C(=C(C=C1)F)N2C=C(C3=C2C=CC(=N3)N(C)C4CCN(CC4)CC)C5=CN=CN=C5)F

BI-882370 is a potent and selective RAF kinase inhibitor that binds to the ATP binding site of the kinase positioned in the DFG-out (inactive) conformation of the BRAF kinase. BI-882370 (BI 882370) inhibits the oncogenic BRAFV600E-mutant, the WT BRAF and CRAF kinases with IC50s of 0.4, 0.8, and 0.6 nM, respectively. BI-882370 also inhibits SRC family kinases[1].
BI-882370 (0.9-6000 nM; 3 days) inhibits the BRAF-mutant human melanoma and colorectal cancer cells proliferation with a EC50 range of 1-10 nM[1].
BI 882370 (0.1-100 nM, 0.1-3000 nM; 2 hours) results in a reduction of p-MEK1/2, p-ERK1/2 and cyclin D1/D2 expression in BRAFV600E-mutant A375 cells; induces phosphorylation of MEK1/2 and enhanced phosphorylation of ERK1/2 in WT BRO cells (3-300 nM)[1].
BI 882370 (0.1-100 nM, 0.1-3000 nM; 24 hours) suppresses cyclin D1/D2 expression, induces Kip1/p27 expression at concentrations of 1 nM or higher in BRAFV600E-mutant A375 cells, expression of cyclins D1/D2 or Kip1/p27 is not affected in WT BRO cells[1].
BI-882370 (deliver orally; 25 mg/kg, 50 mg/kg; twice daily; 2 weeks) is efficacious in multiple mouse models of BRAF-mutant melanomas and colorectal carcinomas, shows superior efficacy compared with Vemurafenib, Dabrafenib, or Trametinib[1].
BI-882370 (deliver orally; 25 mg/kg; twice daily; 40 days) developes resistance within 3 weeks, but resistance is not observed during 5 weeks of second-line therapy in combination with trametinib[1].
BI-882370 (deliver orally; 60 mg/kg; once daily; 2 weeks) indicates lack of toxicity in terms of clinical chemistry, hematology, pathology, and toxicogenomics in rats[1].

Reference

[1]. Waizenegger IC, et al. A Novel RAF Kinase Inhibitor with DFG-Out-Binding Mode: High Efficacy in BRAF-Mutant Tumor Xenograft Models in the Absence of Normal Tissue Hyperproliferation. Mol Cancer Ther. 2016 Mar;15(3):354-65.
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