Utilization of endogenous ATP during histamine release from isolated rat mast cells

Purinergic signaling in inflammatory cells: P2 receptor expression, functional effects, and modulation of inflammatory responses

Extracellular ATP and related nucleotides promote a wide range of pathophysiological responses via activation of cell surface purinergic P2 receptors. Almost every cell type expresses P2 receptors and/or exhibit regulated release of ATP. In this review, we focus on the purinergic receptor distribution in inflammatory cells and their implication in diverse immune responses by providing an overview of the current knowledge in the literature related to purinergic signaling in neutrophils, macrophages, dendritic cells, lymphocytes, eosinophils, and mast cells. The pathophysiological role of purinergic signaling in these cells include among others calcium mobilization, actin polymerization, chemotaxis, release of mediators, cell maturation, cytotoxicity, and cell death. We finally discuss the therapeutic potential of P2 receptor subtype selective drugs in inflammatory conditions.

The effect of non-steroidal anti-inflammatory drugs on adenosine triphosphate content and histamine release from rat peritoneal cell suspensions rich in mast cells

1 Non-steroidal anti-inflammatory drugs (NSAID) suppressed compound 48/80-induced histamine release from rat peritoneal cells in vitro in a dose-dependent manner. 2 NSAID suppressed the adenosine triphosphate (ATP) content of rat peritoneal cells in vitro and this correlated strongly with the suppression of compound 48/80-induced histamine release. 3 The correlation demonstrated suggests that the mechanism of action of NSAID in the rat peritoneal cells is via depletion of cellular ATP.