Getting, Stephen J. and Flower, Roderick J. and Parente, Luca and de Medicis, Rinaldo and Lussier, Andre and Woliztky, Barry A. and Martins, Marco A. and Perretti, Mauro (1997) Molecular determinants of monosodium urate crystal-induced murine peritonitis: a role for endogenous mast cells and a distinct requirement for endothelial-derived selectins. Journal of Pharmacology and Experimental Therapeutics, 283 (1). pp. 123-130. ISSN 0022-3565
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Injection of monosodium urate (MSU) crystals, the etiological cause of gouty arthritis, into murine peritoneal cavities produced an intense recruitment of polymorphonuclear leukocytes (PMN). After 3 mg MSU crystal injection, cell influx was maximal (∼ 10 × 106 cells per mouse) at 6 hr postinjection and sustained up to the 24 hr time-point. In mice depleted of mast cells by administration of compound 48/80 72 hr before challenge with MSU crystals a lower PMN influx was measured (58% reduction). The occurrence of endogenous mast cell activation, in the MSU response, was validated by the observation that MSU challenge reduced by more than 90% the number of intact mast cells recovered in the peritoneal washes. Pretreatment of mice with a histamine H1 antagonist (tripolidine; 0.5 mg/kg) or a platelet-activating factor receptor antagonist (WEB2086; 10 mg/kg) significantly reduced by 50 to 60% the number of PMN recovered from the peritoneal cavities. The molecular determinants of this process of leukocyte recruitment were also investigated. Treatment of mice with an anti-CD62P or anti-CD62E monoclonal antibody (mAb; 100 μg i.v.) produced a distinct inhibition of PMN recruitment measured at 6 hr, whereas only a combined administration of both monoclonal antibodies was effective in reducing by 60% the influx of PMN caused by the MSU crystals within 24 hr. In conclusion, these data highlight a role for endogenous mast cells and for endothelial-derived selectins in MSU crystal-induced PMN recruitment into the peritoneal cavity, and may be useful to dissect molecular mechanism(s) which may be operating in gouty arthritis.
|Research Community:||University of Westminster > Life Sciences, School of|
|Deposited On:||24 Jul 2012 10:54|
|Last Modified:||24 Jul 2012 10:54|
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