The roles of IL-4, IL-5 and mast cells in the accumulation of eosinophils during allergic cutaneous late phase reaction in mice

摘要

Late phase allergic response has been implicated in the pathogenesis of allergic diseases. In the current study, we investigated the role of IL-4, IL-5 and mast cells in the development of cutaneous late phase reaction (LPR) in mice. Antigenic challenge of ears of ovalbumin (OVA)-immunized BALB/c mice caused a biphasic ear swelling peaking at 1 hr (immediate phase reaction: IPR) and 24 hr (LPR). Ear swelling in LPR was significantly suppressed by the treatment with anti-IL-4 monoclonal antibody (mAb) before antigen challenge. Local eosinophil accumulation during LPR, however, was not inhibited by anti-IL-4 mAb. Moreover, anti-IL-5 mAb had no effect on the swelling response though it significantly suppressed the local accumulation of eosinophils. Interestingly, mast cell-deficient mice (WBB6F1-W/W-v) developed LPR without exhibiting IPR, while the magnitude of ear swelling and local eosinophilia was significantly lower than in normal congenic mice (+/+ mice), The present findings show that IL-4 and IL-5 differently regulate the development of LPR, and that IgE-mediated mast cell activation is required for full response. (C) 2001 Elsevier Science Inc. All rights reserved. [References: 24]