LY2940680

Taladegib (LY2940680) is an antagonist of the smoothened receptor.

Signaling Pathways >> Stem Cell/Wnt >> Smo

Research Areas >> Cancer

Smo[1]

Taladegib, a small-molecule antagonist of the smoothened receptor, shows a slight inhibitory effect on cell proliferation without differences between mucin- (IC50: Taladegib=49.8±4.5 μM) and mixed- Cholangiocarcinoma (CCA) (IC50: Taladegib=61.2±21.1 μM)[1]. The IC50 for Taladegib inhibition of [3H]MRT-92 binding is right shifted (3- to 100-fold) for the S387AECL2, L325F3.36f, and D473H6.54f mutants but did not differ from that of WT receptor for the other mutants. The ability of SANT-1 to inhibit [3H]MRT-92 binding to V329F3.40f and T466F6.47f mutants is abolished, and it is severely impaired for L325F3.40f, I408F5.51f, and M525G7.45f mutants (4- to 140-fold drop of the IC50), but is not modified for the S387AECL2 mutant. Taken together, these data confirm our docking hypothesis that MRT-92-binding mode differs from that of either Taladegib or SANT-1 by simultaneously occupying binding sites 1 and 2[2].

[1]. Fraveto A, et al, Sensitivity of Human Intrahepatic Cholangiocarcinoma Subtypes to Chemotherapeutics and Molecular Targeted Agents: A Study on Primary Cell Cultures. PLoS One. 2015 Nov 16;10(11):e0142124.

[2]. Hoch L, et al. MRT-92 inhibits Hedgehog signaling by blocking overlapping binding sites in the transmembrane domain of the Smoothened receptor. FASEB J. 2015 May;29(5):1817-29.

[3]. Ma W, et al. Reduced Smoothened level rescued Aβ-induced memory deficits and neuronal inflammation in animal models of Alzheimer's disease. J Genet Genomics. 2018 May 20;45(5):237-246.

SAG.HCI | Purmorphamine | LDE225 (NVP-LDE225,Erismodegib) | PF-04449913 | Jervine | BMS-833923 | LEQ506 | MK-4101 | MRT-83 | PF-5274857 | Saridegib