defoslimod   Click here for help

GtoPdb Ligand ID: 9024

Synonyms: OM 174 | OM-174
Immunopharmacology Ligand
Comment: Defoslimod is an analogue of lipopolysaccharide endotoxin-derived lipid A obtained from E. coli [1]. It was developed as an immunotherapeutic agent for the treatment of cancer. Defoslimod acts as an agonist of Toll-like receptors 2 and 4 (TLR2 and TLR4) [2].
We show the structure with chemical formula provided in the INN record for the compound (C52H100N2O20P2). PubChem CID 56841121, which claims to represent defoslimod has an extra carbon atom and two associated hydrogens (C53H102N2O20P2). But note also that the structure reported in [1] only has 51 carbon atoms.
2D Structure
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Physico-chemical Properties
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Hydrogen bond acceptors 22
Hydrogen bond donors 11
Rotatable bonds 48
Topological polar surface area 366.48
Molecular weight 1134.63
XLogP 10.1
No. Lipinski's rules broken 4
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InChI InChI=1S/C52H100N2O20P2/c1-4-7-10-13-16-19-22-25-28-31-38(56)34-42(57)53-45-48(61)47(60)41(72-52(45)74-76(66,67)68)37-69-51-46(49(62)50(40(36-55)71-51)73-75(63,64)65)54-43(58)35-39(32-29-26-23-20-17-14-11-8-5-2)70-44(59)33-30-27-24-21-18-15-12-9-6-3/h38-41,45-52,55-56,60-62H,4-37H2,1-3H3,(H,53,57)(H,54,58)(H2,63,64,65)(H2,66,67,68)/t38-,39+,40-,41-,45-,46-,47-,48-,49-,50-,51-,52-/m1/s1
Bioactivity Comments
OM-174 has been tested in a rat model of metastatic colon cancer, where it was found to activate the immune system (via antigen presentation) and induce tumour cell apoptosis, thus eliminating tumour nodules [5]. This treatment appeared to immunise the rats against the injected tumour-forming cells (PROb cancer cells), as post-treatment re-injection did not result in new tumour formation [5].
OM-174 has also been sucessfully tested as an adjuvant in immunization of mice against the malarial parasite Plasmodium berghei [4].
Selectivity at catalytic receptors
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Target Sp. Type Action Value Parameter Concentration range (M) Reference
TLR2 Mm Agonist Agonist - - - 2
TLR4 Mm Agonist Agonist - - - 2