TAS-116 (C007B-299757)

InformationTAS-116 TAS-116 is a novel, small-molecule HSP90 inhibitor which inhibits geldanamycin-FITC binding to HSP90 proteins with Ki values of 34.7 nmol/L, 21.3 nmol/L, >50,000 nmol/L, and >50,000 nmol/L for HSP90α, HSP90β, GRP94, and TRAP1, respectively. Furthermore, TAS-116 does not inhibit other ATPases such as HSP70 (IC50 >200 μmol/L).TargetsHSP90β (Cell-free assay); HSP90α (Cell-free assay ) 21.3 nM(Ki); 34.7 nM(Ki)In vitroTAS-116 is a selective inhibitor of cytosolic HSP90α and β that does not inhibit HSP90 paralogs such as endoplasmic reticulum GRP94 or mitochondrial TRAP1. Treatment of HCT116 cells with 0.3 μmol/L TAS-116 for 8 hours results in reduced levels of DDR1, which interacts with HSP90α and induction of HSP70, which is a surrogate marker of cytosolic HSP90 inhibition.In vivoOral administration of TAS-116 leads to tumor shrinkage in human tumor xenograft mouse models accompanied by depletion of multiple HSP90 clients. In a rat model, the antitumor activity of TAS-116 is accompanied by a higher distribution of the compound in subcutaneously xenografted NCI-H1975 non-small cell lung carcinoma tumors than in retina. TAS-116 shows activity against orthotopically transplanted NCI-H1975 lung tumors. Pharmacokinetic profiling of TAS-116 in rodent and nonrodent species shows that TAS-116 is orally absorbed and had a bioavailability of almost 100% in mice, 69.0% in rats, and 73.9% in dogs without special formulation. In a HER2-expressing NCI-N87 human gastric cancer xenograft mouse model, chronic administration of TAS-116 is tolerable, with the average weight loss in mice not exceeding 10% during the treatment period.Cell Research(from reference)Cell lines：HCT116 cells Concentrations：0.3, 1 and 3 μM Incubation Time：8 hours. Specification: 10mM in DMSO Molecular Formula: C25H26N8O Molecular Weight: 454.53 PubChem CID: 67501411 Isomeric SMILES: CCC1=C(C=CC(=C1)C(=O)N)N2C3=NC=CC(=C3C(=N2)C(C)C)N4C=C(N=C4)C5=CN(N=C5)C