Cross-reactivity of Can f 1 with Syrian hamster and Fel d 1 in children

Main Article Content

Jeongmin Lee
Se-ah Jeon
Sooyoung Lee

Keywords

Syrian hamster; dog allergy; cross-reactivity

Abstract

Introduction and objectives: With increasing pet allergies among pediatric patients, the need for precise environmental care is increasing. We investigated the clinical, immunological, and environmental characteristics of pediatric patients sensitized to a dog to evaluate the cross-antigenicity of canine lipocalin Can f 1 with feline lipocalin Fel d 1 and Syrian hamster
extract.
Materials and methods: The protein fractions of the processed and commercial Syrian hamster extracts were compared using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). An enzyme-linked immunosorbent assay (ELISA) inhibition test was performed on Can f 1, Fel d 1, and processed Syrian hamster extract, and the antigen-specific immunoglobulin E (IgE)-binding capacity for each antigen was analyzed using serum samples from patients.
Results: Twelve of 19 patients with a median age of 40.5 months were symptomatic when exposed to dogs. Eleven (91.7%) patients showed a positive IgE response to Can f 1. Two patients were positive for Fel d 1-specific IgE antibody, and one was positive for hamster-specific IgE antibody. SDS-PAGE confirmed the presence of different patterns of protein bands
between the commercial and processed hamster extracts. There was no cross-antigenicity among Can f 1, Fel d 1, and processed Syrian hamster extract.
Conclusions: Since the standard commercial hamster extract did not contain Syrian hamster antigens that were diverse enough, caution should be taken when using it. In children allergic to cats and dogs, sensitization to isolated Can f 1 or Fel d 1 is unlikely to cause cross-reactivity to Syrian hamster hair and epithelium.

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