The heat shock protein 90 (Hsp90) is a molecular chaperone that activates and maintains the biological functioning of several client proteins, many of which are associated with oncogenic signaling pathways. Its activity is driven by ATP and regulated by co-chaperones such as Hsp72. CCT018159 is a 3,4-diaryl pyrazoloresorcinol compound that inhibits the ATPase activity of Hsp90 with IC values of 3.2 and 6.6 µM for human Hsp90β and yeast Hsp90, respectively. At concentrations up to 100 µM, CCT018159 does not inhibit human Hsp72 ATPase or topoisomerase II, yet at 50 µM CCT018159 inhibits 13 out of a panel of 20 commonly studied kinases. In human tumor xenografts, such as SKMEL 28 melanoma cells, CCT018159 induces Hsp72 expression and dc-Raf, ERBB2, and Cdk4.
CCT018159 is an ATP-competitive HSP90β inhibitor, with an IC50 of 3.2 μM against human HSP90β ATPase and 6.6 μM against yeast HSP90β ATPase. CCT018159 induces cell cycle arrest and apoptosis in tumor cells, and inhibits invasion and angiogenesis. CCT018159 is applicable to cancer-related research.
IC50&Target
human Hsp90β yeast Hsp90
3.2 μM (IC50) 6.6 μM (IC50)
体外研究
CCT018159 can inhibit the growth of human cancer cell lines, with an average GI50 of 5.3 μM. Its activity against HUVECs (GI50: 0.87 μM) is stronger than most cancer cell lines .
CCT018159 (24 h) can induce characteristic molecular markers of HSP90 inhibition, including upregulation of HSP72 in human cancer cells, depletion of substrate proteins (C-RAF, CDK4, ERBB2, mutant B-RAF), and decreased phosphorylation levels of ERK1/2. It can also regulate angiogenesis related substrate proteins in HUVECs.
CCT018159 (41 μM; 16-72 h) can induce cell cycle arrest and apoptosis in SKMEL 5 melanoma cells.
CCT018159 (0-4.4 μM; 24-48 h) can inhibit key functions of endothelial cells and invasion related functions of tumor cells.
CCT018159 (0.1-50 μM) can dose dependently reduce the viability of NCI-H295R cells, with an EC50 of 11.5 μM.
Cell Cycle Analysis
Cell Line:
SKMEL 5
Concentration:
41 μmol/L
Incubation Time:
16, 24, 48, 72 hours
Result:
Caused marked accumulation of SKMEL 5 melanoma cells in the G1 phase by 16 h, with cells arrested in the initial G1 or subsequent G1 phase through 72 h.
分子式
C20H20N2O4
分子量
352.38
CAS号
171009-07-7
运输条件
Room temperature in continental US; may vary elsewhere.