Abstract
Dibutyryl cytidine and adenosine 3':5'-cyclic monophosphates (db-cCMP and db-cAMP respectively) inhibited the synthesis of thromboxane (TX) B2, the stable product of TXA2, and leukotriene (LT) B4 by 4-day carrageenin-elicited rat peritoneal macrophages stimulated by the calcium ionophore A23187. Incubation of macrophages with dbcAMP, at concentrations inhibiting eicosanoid release, was associated with an increase in intracellular cAMP concentrations. No such increase was seen when db-cCMP was used.
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