BLZ-945

Cas No.:	953769-46-5
Chemical Name:	BLZ945
Synonyms:	BLZ945;4-((2-(((1R,2R)-2-Hydroxycyclohexyl)amino)benzo-[d]thiazol-6-yl)oxy)-N-methylpicolinamide;4-((2-(((1R,2R)-2-hydroxycyclohexyl)aMino)benzo[d]thiazol-6-yl)oxy)-N-MethylpicolinaMide;4-[[2-[[(1R,2R)-2-hydroxycyclohexyl]amino]-1,3-benzothiazol-6-yl]oxy]-N-methylpyridine-2-carboxamide;BLZ-945;4-[[2-[[(1R,2R)-2-Hydroxycyclohexyl]amino]-6-benzothiazolyl]oxy]-N-methyl-2-pyridinecarboxamide;7W3V82OQ0P;C20H22N4O3S;BLZ 945;GTPL8250;SYN1197;ADZBMFGQQWPHMJ-RHSMWYFYSA-N;4-[[2-[[(1R,2R)-2-hydroxycyclohexyl]amino]-1,3-benzothiaz
SMILES:	O=C(NC)C1=NC=CC(OC2=CC3=C(N=C(N[C@@H]4CCCC[C@H]4O)S3)C=C2)=C1
Formula:	C20H22N4O3S
M.Wt:	398.48
Purity:	>98%
Sotrage:	2 years -20°C Powder, 2 weeks 4°C in DMSO, 6 months -80°C in DMSO

Description:	BLZ945 is a potent, selective and brain-penetrant CSF-1R inhibitor with an IC50 of 1 nM, showing more than 1,000-fold selectivity against its closest receptor tyrosine kinase homologs.
In Vivo:	Mice are treated with BLZ945 or vehicle, and evaluated for symptom-free survival. Median survival in the vehicle-treated cohort is 5.7 weeks. In striking contrast, BLZ945 significantly improves long-term survival with 64.3% surviving to the 26-week trial endpoint. This endpoint is chosen because Ink4a/Arf−/− mice develop spontaneous tumors, including lymphomas and sarcomas, beginning at ~30 weeks. BLZ945 is well-tolerated over long-term treatment, with no visible side-effects, consistent with histopathological studies. Histological grading revealed high-grade, invasive gliomas in all vehicle-treated mice. By contrast, BLZ945-treated animals have significantly less-malignant tumors, and no detectable lesions in 55.6% of asymptomatic mice at the endpoint[1]. Mice receiving BLZ945 shows reduced CSF1R staining in both cervical tumors and the associated stroma, with a significant decrease in CSF1R+ stromal macrophages relative to vehicle-treated mice (P<0.05)[2].
In Vitro:	Treatment of bone marrow-derived macrophages (BMDMs) with BLZ945 inhibits CSF-1-dependent proliferation (EC50=67 nM), and decreases CSF-1R phosphorylation, similar to CSF-1R antibody blockade. BLZ945 also reduces viability of CRL-2467 microglia, Ink4a/Arf−/− BMDMs (PDG genetic background), and NOD/SCID BMDMs. Importantly, BLZ945 treatment in culture does not affect proliferation of any PDG-derived tumor cell lines (all Csf-1r-negative), or U-87 MG human glioma cells, and PDG cell tumor sphere formation is unaffected. Thus, BLZ945 has no direct effects on glioma cells, and perturbs macrophage survival through CSF-1R inhibition[1].