Nonsteroidal selective glucocorticoid modulators: the effect of C-10 substitution on receptor selectivity and functional potency of 5-allyl-2,5-dihydro-2,2,4-trimethyl-1H-[1]benzopyrano[3,4-f]quinolines.
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Kym PR, Kort ME, Coghlan MJ, Moore JL, Tang R, Ratajczyk JD, Larson DP, Elmore SW, Pratt JK, Stashko MA, Falls HD, Lin CW, Nakane M, Miller L, Tyree CM, Miner JN, Jacobson PB, Wilcox DM, Nguyen P, Lane BC
Nonsteroidal selective glucocorticoid modulators: the effect of C-10 substitution on receptor selectivity and functional potency of 5-allyl-2,5-dihydro-2,2,4-trimethyl-1H-[1]benzopyrano[3,4-f]quinolines.
J Med Chem. 2003 Mar 13;46(6):1016-30.
- PubMed ID
- 12620078 [ View in PubMed]
- Abstract
The preparation and characterization of a series of C-10 substituted 5-allyl-2,5-dihydro-2,2,4-trimethyl-1H-[1]benzopyrano[3,4-f]quinolines as a novel class of selective ligands for the glucocorticoid receptor is described. Substitution at the C-10 position of the tetracyclic core with linear, two-atom appendages (OCH(3), OCF(2)H, NHMe, SMe, CH=CH(2), Ctbd1;CH, CH(2)OH) provided molecules of high affinity (K(i) = 2-8 nM) for the human glucocorticoid receptor (hGR) with limited cross-reactivity with other steroid receptors (PR, MR, AR, ER). Optimal analogues showed slightly less potent but highly efficacious E-selectin repression with reduced levels of GRE activation efficacy in reporter gene assays relative to prednisolone. Preliminary SAR of analogues containing substitution at the C-9 and C-10 positions identified the 9-OH, 10-OMe analogue 50 and the 9-OH, 10-Cl analogue 58 as compounds that demonstrated potent, GR-mediated inhibition in a conconavalin A stimulated T-cell proliferation assay in both rodent and human whole blood monocytes. When evaluated for their in vivo effects in carrageenan-induced paw edema in rats, 50, 58, and 10-OCF(2)H analogue 35 showed dose-dependent anti-inflammatory effects (50, ED(50) = 16 mg/kg; 58, ED(50) = 15 mg/kg; 35, ED(50) = 21 mg/kg vs ED(50) = 15 mg/kg for 18 and ED(50) = 4 mg/kg for prednisolone).
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- Binding Properties
Drug Target Property Measurement pH Temperature (°C) Prednisolone Glucocorticoid receptor Ki (nM) 2.4 N/A N/A Details Prednisolone Glucocorticoid receptor EC 50 (nM) 2.1 N/A N/A Details Prednisolone Glucocorticoid receptor EC 50 (nM) 25 N/A N/A Details Prednisolone Glucocorticoid receptor EC 50 (nM) 8 N/A N/A Details