Abstract
Several lines of evidence document a critical role for mast cells in immune complex-mediated inflammatory models. However, their role in nonimmune models of acute inflammation is largely unknown. In the present investigation, the role of mast cells was examined in calcium ionophore (A23187)-induced mouse peritoneal inflammation. Intraperitoneal injection of A23187 (20)μg/mouse) elicited marked and transient increases in immunoreactive levels of 6-ketoprostaglandin-F2α, leukotrienes B4, C4, D4, E4, and F4. There were no discernible differences in levels of these mediators in male Swiss Webster mice, mast cell-deficient mice (WBB6F1-W/W′), and age-matched controls (WBB6F1-+/+), suggesting a minimal role of mast cells in eicosanoid biosynthesis in this model. However W/W′ mice showed smaller increases in levels of myeloperoxidase, a marker for neutrophils, compared to +/+ mice. Both W/W′ and +/+ mice have lower constitutive levels of peritonealN-acetyl-β-d-glucosaminidase (NAG), a marker for mononuclear cells. Similar to the changes seen in myeloperoxidase, W/W′ mice exhibited a blunted NAG response compared to +/+ mice. These results suggest that mast cell products other than eicosanoids may contribute to the changes in cellular trafficking in response to intraperitoneal A23187. These results also suggest that mast cells are required for full expression of inflammatory responses.
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Rao, T.S., Shaffer, A.F., Currie, J.L. et al. Role of mast cells in calcium ionophore (A23187)-induced peritoneal inflammation in mice. Inflammation 18, 187–192 (1994). https://doi.org/10.1007/BF01534559
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DOI: https://doi.org/10.1007/BF01534559