Porcine allergy and IgE

Area of Science:

• Veterinary immunology
• Comparative medicine
• Allergy research

Background:

• Anaphylaxis in pigs was first reported in 1963, linked to IgE-related antibodies through functional assays.
• Porcine IgE epsilon chain has been cloned and sequenced, with specific antibodies developed.
• Pigs exhibit natural hypersensitivity and develop transient food allergies, particularly to soy.

Purpose of the Study:

• To review the historical and current understanding of anaphylaxis and IgE in pigs.
• To highlight the utility of pigs as models for human food allergy research.
• To explore the potential of porcine models for investigating allergy pathogenesis, prophylaxis, and therapy.

Main Methods:

• Review of historical data on porcine anaphylaxis and IgE.
• Description of molecular cloning and sequencing of porcine IgE.
• Induction of experimental allergies to peanut and egg allergens in pigs.
• Observation of clinical signs mimicking human food allergy.

Main Results:

• Experimental sensitization in pigs confirmed IgE involvement in anaphylaxis.
• Development of tools like anti-pig IgE and cloned IgE sequences.
• Successful induction of experimental allergies in pigs to common food allergens.
• Demonstration of clinical manifestations (respiratory, cutaneous, enteric) similar to human allergies.

Conclusions:

• Pigs provide a relevant model for studying immediate hypersensitivity and food allergies.
• Porcine models offer a valuable alternative to mice or humans for allergy research.
• These models can advance the understanding and treatment of human food allergies.