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Biochemical Pharmacology 1992-Aug

Antiflammins. Anti-inflammatory activity and effect on human phospholipase A2.

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F Cabré
J J Moreno
A Carabaza
E Ortega
D Mauleón
G Carganico

Keywords

Abstract

Two anti-inflammatory peptides (antiflammins) corresponding to a high amino acid similarity region between lipocortin I and uteroglobin were tested for their ability to inhibit purified human synovial fluid phospholipase A2 (HSF-PLA2). No inhibitory activity was observed, even at such high concentrations of peptides as 50 microM. When antiflammins were preincubated with the enzyme and/or the substrate, no HSF-PLA2 inhibition was detected. In vivo anti-inflammatory activity of these peptides was evaluated in several experimental models of inflammation induced by carrageenan, croton-oil, oxazolone and Naja naja naja venom phospholipase A2 (PLA2). In contrast to the in vitro results, anti-inflammatory activity was observed in all tests, except when inflammation was induced by snake venom PLA2. Taken together, our results do not support the hypothesis that the in vivo anti-inflammatory effect of antiflammins is directly related to inhibition of PLA2 activity.

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