Mediators of Inflammation

Mediators of Inflammation / 1997 / Article

Open Access

Volume 6 |Article ID 510247 | https://doi.org/10.1080/09629359791703

C. Cicala, M. Bucci, F. D′Acquisto, L. Parente, G. Cirino, "Sequential release of TNFα and phospholipase A2 in a rat model of LPS-induced pleurisy", Mediators of Inflammation, vol. 6, Article ID 510247, 5 pages, 1997. https://doi.org/10.1080/09629359791703

Sequential release of TNFα and phospholipase A2 in a rat model of LPS-induced pleurisy

Abstract

The levels of extracellular phospholipase A2 (sPLA2) and TNFα, and cell accumulation were measured in the pleural washings obtained at different times following the induction of Escherichia coli lipopolysaccharide (LPS, 100 μg/cavity) pleurisy in rats. TNFα peaked at 2 hours (3036 ± 160.3 units/ml) and decreased thereafter. Conversely, levels of sPLA2 peaked at 48 hours (1.97 ± 0.64 ng/ml) and were increased further (14.02 ± 4.16 ng/ml) by pretreatment with anti-TNFα antibody. Cell accumulation was not affected by antibody pretreatment. These data indicate that the sPLA2 enzyme is involved in LPS-induced pleurisy. The enzyme seems not to be stimulated by TNFα which may be involved in the downregulation of sPLA2 in this model of inflammation.

Copyright © 1997 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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