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Related Experiment Videos

Wild rice, hypoallergenic rice--immunologic comparison.

Hye-Yung Yum1, Kyung Eun Lee, Sung Youn Choi

  • 1Department of Pediatrics, Pochon CHA University, College of Medicine, Seoul, Korea.

Allergy and Asthma Proceedings
|September 5, 2006
PubMed
Summary

Cooking rice significantly reduces, but does not eliminate, allergenic proteins. Even hypoallergenic rice varieties retain some IgE binding activity, suggesting potential allergenicity in sensitive individuals.

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Area of Science:

  • Food Science
  • Allergy Research
  • Biochemistry

Background:

  • Rice is a staple food in Asia, but IgE-mediated hypersensitivity reactions like asthma and eczema have been linked to its consumption.
  • Hypoallergenic rice varieties are used in Japan for atopic patients, but their allergenicity requires further investigation.

Purpose of the Study:

  • To identify major rice allergens.
  • To assess changes in allergenicity after cooking.
  • To compare the allergenicity of cooked, wild, and hypoallergenic rice.

Main Methods:

  • Protein analysis using SDS-PAGE.
  • Immunoblotting to detect specific IgE binding.
  • Enzyme-linked immunosorbent assay (ELISA) and CAP test for inhibition assays.

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Main Results:

  • Rice origin and polishing level did not affect protein profiles.
  • Cooking significantly reduced detectable protein bands from raw rice.
  • IgE immunoblot analysis could not differentiate between wild and hypoallergenic rice.
  • Both wild and hypoallergenic rice retained IgE binding activity on remaining proteins.

Conclusions:

  • Boiling largely removes or weakens rice proteins.
  • Allergenic potential remains in cooked rice, including hypoallergenic varieties.
  • Further research is needed to fully understand rice allergenicity in sensitive populations.