Antigen-Induced Anaphylactic Death in MiceLei H.-Y. · Lee S.-H. · Leir S.-H.
Department of Microbiology and Immunology, National Cheng Kung, University College of Medicine, Tainan, Taiwan, Republic of China
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Intravenous injection of bovine serum albumin (BSA) into the BSA/CFA-primed ICR mice specifically induced anaphylactic death within 1 h. The anaphylactic death could not be induced until day 8 after sensitization, and sensitization subsisted for more than 3 months. The response was dose dependent; mice challenged with BSA doses higher or equivalent to 25 μg developed anaphylactic death. The intravenous route was more effective than the intraperitoneal one, while subcutaneous injection was ineffective. Antigen in any of complete Freund’s adjuvant, incomplete Freund’s adjuvant or aluminum hydroxide could sensitize the mice to develop anaphylactic death. The combination of antigen and the mouse strain or the gender of the mouse determined the susceptibility of the anaphylactic death. AKR, B10.BR, as well as ICR, strains were susceptible. Antigen of HoGG induced a higher mortality rate than that of GAT or lysozyme. Male mice were more susceptible than female ones. The BSA-induced anaphylactic death could be prevented by pretreating ICR mice with cyproheptadine (histamine and serotonin antagonist) or diphenhydramine (histamine antagonist) and ketanserin (serotonin antagonist). Intravenous injection of saline during anaphylaxis also protected the mice from death. Furthermore, immune serum could transfer the anaphylactic death, and heat (56°C, 4 h) did not destroy its activity. The primary IgG subclass induced by GAT, HoGG or lysozyme was IgGl. There was no qualitative difference in the IgG subclass induced in different strains by different antigens. The IgE class of antibodies was not detectable. These results suggest that there is a non-IgE-mediated anaphylactic death which involves the release of histamine and serotonin that cause the increase of vasopermeability and fatal blood volume loss.
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