Attenuation of the rat conjunctival response by repeated topical challenge with dinitrophenyl (DNP) hapten was demonstrated in our study. Adult rats were immunized by intraperitoneal injections of dinitrophenylated Ascaris suum extract (DNP-Asc) and alum. Serum levels of anti-DNP homocytotropic antibody
The binding and release of soluble guinea pig IgG2-containing DNPBSA-anti-DNP complexes and antigen-free, covalently-linked anti-DNP IgG2 oligomers of similar size, by guinea pig peritoneal macrophages, has been examined in the absence and presence of monomeric IgG2, of unrelated antibody specificity
The ocular late-phase reaction (LPR) is a mast cell-dependent, delayed inflammatory reaction developing 4-12 h after the early-phase reaction (EPR). We developed a passive IgG1 antibody-dependent guinea pig model that clinically reproduced the biphasic reaction of ocular EPR and LPR.
In rat basophilic leukemia cells (RBL-2H3), a tumor analogue of mast cells, the aggregation of IgE receptors initiates increase in the intracellular concentration of calcium ([Ca2+]i), monitored with the fluorescent Ca probe fura-2, and finally results in histamine secretion. In
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