Effect of leflunomide on constitutive and inducible pathways of cellular eicosanoid generation

Autor: Weithmann, K. U., Jeske, S., Schlotte, V.
Zdroj: Inflammation Research; May 1994, Vol. 41 Issue: 3-4 p164-170, 7p
Abstrakt: Leflunomide exerts its effects primarily via the immunomodulating and antiphlogistic activities of its major metabolite A 77 1726. Our investigation in several eicosanoid forming systems revealed that in human white blood cells the metabolite did not cause any alteration on Ca-ionophore stimulated metabolism of membrane bound arachidonic acid to cis-, trans- and epi-LTB4. Thus, the involved enzyme systems phospholipase A2, 5-lipoxygenase and LTA4-hydrolase can be ruled out as a target of the drug. However, in several cellular systems the drug weakly inhibited the generation of 5-HETE and LTB4 from exogenous arachidonic acid, possibly by interfering with the exogenous substrate's access to the 5-lipoxygenase.
Databáze: Supplemental Index