Back to Search
Start Over
Characterization of the Novel P-Selectin Inhibitor PSI-697 [2-(4-Chlorobenzyl)-3-hydroxy-7,8,9,10-tetrahydrobenzo[h] Quinoline-4-carboxylic acid] in Vitro and in Rodent Models of Vascular Inflammation and Thrombosis
- Source :
- The Journal of Pharmacology and Experimental Therapeutics; February 2008, Vol. 324 Issue: 2 p497-506, 10p
- Publication Year :
- 2008
-
Abstract
- P-selectin plays a significant and well documented role in vascular disease by mediating leukocyte and platelet rolling and adhesion. This study characterizes the in vitro activity, pharmacokinetic properties, and the anti-inflammatory and antithrombotic efficacy of the orally active P-selectin small-molecule antagonist PSI-697 [2-(4-chlorobenzyl)-3-hydroxy-7,8,9,10-tetrahydrobenzo[h] quinoline-4-carboxylic acid; molecular mass, 367.83]. Biacore and cell-based assays were used to demonstrate the ability of PSI-697 to dose dependently inhibit the binding of human P-selectin to human P-selectin glycoprotein ligand-1, inhibiting 50% of binding at 50 to 125 μM. The pharmacokinetics of PSI-697 in rats were characterized by low clearance, short half-life, low volume of distribution, and moderate apparent oral bioavailability. A surgical inflammation model, using exteriorized rat cremaster venules, demonstrated that PSI-697 (50 mg/kg p.o.) significantly reduced the number of rolling leukocytes by 39% (P< 0.05) versus vehicle control. In a rat venous thrombosis model, PSI-697 (100 mg/kg p.o.) reduced thrombus weight by 18% (P< 0.05) relative to vehicle, without prolonging bleeding time. Finally, in a rat carotid injury model, PSI-697 (30 or 15 mg/kg p.o.) administered 1 h before arterial injury and once daily thereafter for 13 days resulted in dose-dependent decreases in intima/media ratios of 40.2% (P= 0.025) and 25.7% (P= 0.002) compared with vehicle controls. These data demonstrate the activity of PSI-697 in vitro and after oral administration in animal models of both arterial and venous injury and support the clinical evaluation of this novel antagonist of P-selectin in atherothrombotic and venous thrombotic indications.
Details
- Language :
- English
- ISSN :
- 00223565 and 15210103
- Volume :
- 324
- Issue :
- 2
- Database :
- Supplemental Index
- Journal :
- The Journal of Pharmacology and Experimental Therapeutics
- Publication Type :
- Periodical
- Accession number :
- ejs68441745
- Full Text :
- https://doi.org/10.1124/jpet.107.128124