Abstract:
:A significant improvement in agonist activity of the previously described 2-aryloctahydrophenanthrene-2,3,7-triol series of dissociated glucocorticoid receptor agonists (DAGRs) was achieved by modifying the substitution at C3 from (S)-3-hydroxy to (R)-3-hydroxy-3-methyl. The IC50 of the prototype 13 in the efficacy assay measuring repression of IL-1 induced MMP-13 expression was 3.5 nM, exhibiting 87% of the maximal effect of dexamethasone (DEX). It displayed a dissociated profile by exhibiting 42% of the maximal effect of DEX in a mouse mammary tumor virus (MMTV) luciferase reporter transactivation assay. Compound 13 and analogues containing heterocyclic replacements for the C2 phenyl and modified B rings showed high repression of TNFα production in human whole blood, with IC50 values (43-167 nM) approaching the level of DEX (21 nM). On the basis of X-ray structures and force field calculations, the overall potency of this series was attributed to a favorable conformation of the C2α phenyl, induced by the neighboring C3α methyl.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Chantigny YA,Murray JC,Kleinman EF,Robinson RP,Plotkin MA,Reese MR,Buckbinder L,McNiff PA,Millham ML,Schaefer JF,Abramov YA,Bordner Jdoi
10.1021/jm501601bsubject
Has Abstractpub_date
2015-03-26 00:00:00pages
2658-77issue
6eissn
0022-2623issn
1520-4804journal_volume
58pub_type
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