International archives of allergy and immunology
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Int. Arch. Allergy Immunol. · Jan 1997
Dermatophagoides-farinae-induced pulmonary eosinophilic inflammation in mice.
Dermatophagoides farinae (Der f) is one of the most common species of dust mites that induce asthma and allergic rhinitis. We have reported that Der f challenge on sensitized mice elicited a distinct type of hypersensitivity, called early-type hypersensitivity (ETH), in subcutaneous tissues and in airways. The airway ETH was accompanied by a series of inflammatory and immunological events including cytokine production, adhesion molecule expression, inflammatory cell infiltration, eosinophilia, and airway hyperreactivity. ⋯ The concomitant accumulation of neutrophils and mononuclear cells, however, was not affected by this treatment. On the other hand, intranasal administration of mAb to murine TNF-alpha (MP6-XT3, 20 micrograms/ mouse), but not IL-5, 1 h before challenge and 24 h AC significantly reduced the numbers of eosinophils, neutrophils, and lymphocytes in the BAL fluids. The intraperitoneal injection of dexamethasone (50 mg/kg) for a total of four times resulted in total inhibition of the Der-f-induced cellular responses, whereas vasoactive amine antagonists (diphenhydramine, ketanserin and cyprohepatidine) did not show any effect.