Arachidonic acid-induced inflammation: inhibition by dual inhibitor of arachidonic acid metabolism, SK&F 86002

Inflammation
D E GriswoldN Hanna

Abstract

The antiinflammatory activity of the structurally novel dual inhibitor of arachidonic acid metabolism, SK&F 86002 was evaluated using arachidonic acid-induced edema and inflammatory cell infiltration. Histological examination demonstrated extensive subcutaneous edema and neutrophil (PMN) accumulation in perivascular and interstitial locations one hour after application of arachidonic acid to the ear. SK&F 86002 and, to a lesser extent, phenidone demonstrated potent inhibition of this inflammatory response following oral and topical administration. Nordihydroguaiaretic acid (NDGA) displayed only topical activity. The selective cyclooxygenase inhibitors ibuprofen and naproxen were either inactive or stimulated ear swelling. Histological evaluation of the lesion in drug-treated animals revealed that SK&F 86002 impaired edema formation and caused a significant reduction in numbers of infiltrating neutrophils. Using arachidonic acid-induced peritoneal exudation, a reduction in the cellular infiltrate was observed after oral treatment with SK&F 86002 or phenidone, but not with naproxen. Taken together, these data illustrate the potent antiinflammatory effects of SK&F 86002 and support the suggestion that 5-lipoxygenase products play ...Continue Reading

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