For research use only. Not for therapeutic Use.
RG-12525 is a a specific, competitive and orally effective antagonist of the peptidoleukotrienes, LTC4, LTD4 and LTE4, inhibiting LTC4-, LTD4- and LTE4-inducd guinea pig parenchymal strips contractions, with IC50s of 2.6 nM, 2.5 nM and 7 nM, respectively; RG-12525 is also a peroxisome proliferator-activated receptor gamma (PPAR-gamma) agonist with IC50 of appr 60 nM and a potent inhibitor of CYP3A4, with a Ki value of 0.5 µM.
RG 12525 competitively inhibits 3H-LTD4 binding to lung membranes (Ki = 3.0 +/- 0.3 nM) and competitively antagonizes the spasmogenic activity of LTC4, LTD4 and LTE4 on lung strips (KB values = 3 nM) with greater than 8000 fold selectivity[1]. RG 12525 (2.5 µM or 25 µM) inhibits the microsomal activity of CYP2C9 and -3A4, but does not significantly inhibit CYP1A2,-2A6, -2C19, or -2D6. RG 12525 (25 µM) also causes a substantial amount of inhibition at the 5 and 10 µM midazolam concentrations[2].
RG 12525 orally inhibits LTD4 induced wheal formation (ED50 = 5 mg/kg with a t1/2 = 10 hrs at 9 mg/kg), LTD4 induces bronchoconstriction (ED50 = 0.6 mg/kg), and anaphylactic death (ED50 = 2.2 mg/kg with a t1/2 = 7 hrs at 10 mg/kg) and antigen induces bronchoconstriction (ED50 = 0.6 mg/kg)[1]. RG 12525 inhibits antigen-induced mortality in the systemic anaphylaxis model with an ED50 (95% confidence interval) = 2.2 (0.8-6.4) mg/kg. RG 12525 also protects against LTD4-induced bronchoconstriction in a model measuring changes in pulmonary function with an ED50 = 0.6 (0.4-1.0) mg/kg[3].
| Catalog Number | I013594 |
| CAS Number | 120128-20-3 |
| Synonyms | 2-[[4-[[2-(2H-tetrazol-5-ylmethyl)phenyl]methoxy]phenoxy]methyl]quinoline |
| Molecular Formula | C25H21N5O2 |
| Purity | ≥95% |
| InChI | InChI=1S/C25H21N5O2/c1-2-7-20(19(6-1)15-25-27-29-30-28-25)16-31-22-11-13-23(14-12-22)32-17-21-10-9-18-5-3-4-8-24(18)26-21/h1-14H,15-17H2,(H,27,28,29,30) |
| InChIKey | JELDFLOBXROBFH-UHFFFAOYSA-N |
| SMILES | C1=CC=C2C(=C1)C=CC(=N2)COC3=CC=C(C=C3)OCC4=CC=CC=C4CC5=NNN=N5 |
| Reference | [1]. Van Inwegen RG, et al. Antagonism of peptidoleukotrienes and inhibition of systemic anaphylaxis by RG 12525 in guinea pigs. Life Sci. 1989;44(12):799-807. [2]. Fayer JL, et al. Lack of correlation between in vitro inhibition of CYP3A-mediated metabolism by a PPAR-gamma agonist and its effect on the clinical pharmacokinetics of midazolam, an in vivo probe of CYP3A activity. J Clin Pharmacol. 2001 Mar;41(3):305-16 [3]. Carnathan GW, et al. The effect of RG 12525 on leukotriene D4-mediated pulmonary responses in guinea pigs. Agents Actions. 1989 Jun;27(3-4):316-8. |
