Induction of shrimp tropomyosin-specific hypersensitivity in mice

Patrick S Leung, Yuen Shan Lee, Chi Yan Tang, Wing Yee Kung, Ya Hui Chuang, Bor Luen Chiang, Ming Chiu Fung, Ka Hou Chu

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Abstract

Background: Shellfish hypersensitivity is amongst the most common food allergies. The major shellfish allergen was identified as tropomyosin. Here, we investigated the immediate hypersensitivity responses, IgE and cell-mediated immune response in mice sensitized with recombinant shrimp tropomyosin. Methods: Shrimp tropomyosin was cloned and expressed as a His-tagged fusion recombinant protein in Escherichia coli. Three- to 4-week-old BALB/c mice were sensitized by intragastric administration of recombinant tropomyosin (0.1 mg) plus cholera toxin (10 μg) on days 0, 12, 19 and 26 and challenged on day 33. Mice fed with phosphate-buffered saline plus cholera toxin were included as controls. Animals were monitored for immediate hypersensitive responses and tropomyosin-specific IgE over time. In addition, shrimp tropomyosin-specific CD4+ T cells, interleukin-4 and interferon-γ levels were determined from in vitro splenocyte cultures. A passive cutaneous anaphylaxis assay was also conducted. Results: Mice fed with shrimp tropomyosin developed swelling of the snout, increased scratching behavior and shrimp tropomyosin-specific IgE. Sera from tropomyosin-sensitized mice elicited vascular leakage in naïve mice in the passive cutaneous anaphylaxis assay. Shrimp tropomyosin-specific CD4+ T cell proliferations and elevated interleukin-4 over interferon-γ levels were evident in splenocyte cultures of tropomyosin-fed mice upon tropomyosin stimulation. In contrast, shrimp tropomyosin-specific IgE, CD4+ T cells and hypersensitive responses were absent in the control mice. Conclusion: We have generated a BALB/c model of shrimp allergy. This model provides a useful tool for evaluating the immunopathogenic mechanisms involved in shellfish hypersensitivity.

Original languageEnglish (US)
Pages (from-to)305-314
Number of pages10
JournalInternational Archives of Allergy and Immunology
Volume147
Issue number4
DOIs
StatePublished - Nov 2008

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Keywords

  • Cytokines
  • Seafood allergy
  • Shrimp tropomyosin
  • T cell

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

Cite this

Leung, P. S., Lee, Y. S., Tang, C. Y., Kung, W. Y., Chuang, Y. H., Chiang, B. L., Fung, M. C., & Chu, K. H. (2008). Induction of shrimp tropomyosin-specific hypersensitivity in mice. International Archives of Allergy and Immunology, 147(4), 305-314. https://doi.org/10.1159/000144038