MRT-83

• CAT Number: I019693
• CAS Number: 1263131-92-5
• Molecular Formula: C31H30N4O5
• Molecular Weight: 538.59
• Purity: ≥95%
• Synonyms: 3,4,5-trimethoxy-N-[N’-[4-methyl-3-[(4-phenylbenzoyl)amino]phenyl]carbamimidoyl]benzamide
• InChI: InChI=1S/C31H30N4O5/c1-19-10-15-24(33-31(32)35-30(37)23-16-26(38-2)28(40-4)27(17-23)39-3)18-25(19)34-29(36)22-13-11-21(12-14-22)20-8-6-5-7-9-20/h5-18H,1-4H3,(H,34,36)(H3,32,33,35,37)
• InChIKey: BKTMNLKJWHVZRN-UHFFFAOYSA-N
• SMILES: CC1=C(C=C(C=C1)N=C(N)NC(=O)C2=CC(=C(C(=C2)OC)OC)OC)NC(=O)C3=CC=C(C=C3)C4=CC=CC=C4

MRT-83 is a potent antagonist of Smo, with an IC50 in the nanomolar range. MRT-83 also blocks Hedgehog (Hh) signaling.
MRT-83 displays full antagonist properties with an IC50 (~3 nM) for inhibiting ShhN (3 nM)-induced proliferation of rat GCPs. MRT-83 also blocks SAG (0.01 μM)-induced proliferation of GCPs (IC50 ~6 nM). MRT-83 blocks BC binding to HEK-hSmo cells in a dose-dependent manner with an IC50 of 4.6 nM. MRT-83 abrogates BC binding to cells expressing mouse Smo with an IC50 of 14 nM, which is in good correlation with its IC50 in the Shh-light2 and alkaline phosphatase assays[1].
Animals treated with ShhN in the presence of MRT-83 are as healthy as those of the other groups but up-regulation of Ptc transcription in the SVZ of these animals is no longer observed in agreement with a complete inhibition of ShhN-mediated effects (8.7±2.4 Ptc+ cells/section, n=9) and is not different from vehicle-mediated effects. MRT-83 but not MRT-36 antagonizes the up-regulation of Ptc transcription induced by ShhN in vivo in the SVZ of the LV[1].

Reference

[1]. Roudaut H, et al. Identification and mechanism of action of the acylguanidine MRT-83, a novel potent Smoothened antagonist. Mol Pharmacol. 2011 Mar;79(3):453-60.
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