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Three day pleural inflammation: a new model to detect drug effects on macrophage accumulation

N Ackerman, A Tomolonis, L Miram, J Kheifets, S Martinez and A Carter

Mononuclear cell accumulation is of major importance in maintaining chronic inflammatory conditions. In an effort to model this phenomenon, 0.3 ml of a 1% carrageenan solution was injected into the pleural cavity of rats; at various times thereafter peripheral blood and pleural exudate samples were collected. Seventy-two hours after carrageenan injection, 82.3 +/- 3.7 x 10(6) cells (N = 6; mean +/- S.E.) were present in the pleural cavity; over 80% of these cells were macrophages as determined by morphologic and histochemical criteria. Animals treated with dexamethasone had a significantly reduced number of pleural macrophages. Animals treated with the nonsteroidal anti- inflammatory agents, naproxen and indomethacin, had an elevated intrapleural macrophage content. The number of intrapleural cells was not affected by the antirheumatic agents levamisole, d- and dl- penicillamine or gold sodium thiomalate. Animals treated with tilorone, dapsone, hydroxychloroquine, phenylmethane-sulfonyl fluoride and 1,10 phenanthroline had a reduced pleural cell count.

Volume 215, Issue 3, pp. 588-595, 12/01/1980
Copyright © 1980 by American Society for Pharmacology and Experimental Therapeutics




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Copyright © 1980 by the American Society for Pharmacology and Experimental Therapeutics.