Abstract
The roles of IgE in protective immunity and eosinophilia inAngiostrongylus costaricensis infection were examined by comparing IgE-deficient SJA/9 mice and IgE-producing SJL/J mice. In primary infection, mean total IgE levels increased to a maximum of 390 ng/ml, which was more than 10 times greater than the 29 ng/ml measured preinfection in SJL/J mice but less than the 10 ng/ml found in SJA/9 mice throughout the experiment. Immune defense as determined by recovery of adult worms and eosinophilia were similar in SJL/J and SJA/9 mice. Protective immunity was induced by infection withA. costaricensis followed by treatment with levamisole for 4–6 days postinfection. After the challenge infection, the numbers of adult worms and eosinophils in SJA/9 mice were not significantly different from those in SJL/J mice. Anti-A. costaricensis IgE antibody was not detected in either strain of mice during the experiment. These results indicate thatA. costaricensis infection induced the production of IgE not specific for parasite antigens in IgE-producing mice. Potentiated nonspecific IgE played no significant role in immune defense and eosinophilia.
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This work was supported by a grant-in-aid for scientific research (03454179) from The Ministry of Education, Science and Culture of Japan. The experiments were done under the regulation of the Guideline for Animal Experiments, The Jikei University School of Medicine.
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Watanabe, N., Ishiwata, K., Kaneko, S. et al. Immune defense and eosinophilia in congenitally IgE-deficient SJA/9 mice infected withAngiostrongylus costaricensis . Parasitol Res 79, 431–434 (1993). https://doi.org/10.1007/BF00931835
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DOI: https://doi.org/10.1007/BF00931835