[CAS NO. 1792999-26-8]  NCB-0846

NCB-0846 blocks Wnt signalling and shows marked anti-tumour and anti-CSC activities. NCB-0846 binds to TNIK in an inactive conformation, and this binding mode seems to be essential for Wnt inhibition. NCB-0846 shows inhibitory activity against TNIK with an half-maximal inhibitory concentration (IC50) value of 21 nM. It also inhibits FLT3, JAK3, PDGFRα, TRKA, CDK2/CycA2, and HGK (>80% at 0.1 μM). NCB-0846 induces faster migration of TCF4 phosphorylated by TNIK within a concentration range of 0.1-0.3 μM and completely inhibits the phosphorylation of TCF4 at a concentration of 3 μM. Furthermore, NCB-0846 blocks the auto-phosphorylation of TNIK. NCB-0846 inhibits the TCF/LEF transcriptional activity of Wnt3a-treated HEK293 and HCT116 (carrying CTNNB1 mutation) and DLD-1 (carrying APC mutation) colorectal cancer cells. NCB-0846 reduces the expression of the Wnt target genes AXIN2 and MYC as well as that of TNIK, but the expression of CCND1 is not affected. NCB-0846 also reduces the expression of TNIK, AXIN2 and cMYC at the protein level. LRP6 and LRP5 are also downregulated by NCB-0846. NCB-0846 can inhibit cancer cell growth in vitro. NCB-0846 induces an increase in the sub-G1 cell population. NCB-0846 can downregulate the expression of putative colorectal CSC markers: CD44, CD133, and aldehyde dehydrogenase-1 (ALDH1), and reduce the proportion of cells showing high expression of CSC surface markers (CD44, CD133, CD166, CD29 and EpCAM). NCB-0846 also reduces the expression of mesenchymal markers (Slug, Snail, Twist, Smad2 and Vimentin). However, embryonal stem cell markers (Oct4, Nanog and Sox2) are not affected.