Allergens of horse dander: comparison among breeds and individual animals by immunoblotting.

This research aims to debunk the notion that certain horse breeds are non-allergenic. The study found that no breed-specific allergens exist, but there is a significant difference in allergens among all breeds and individual animals inherent in their dander, contradicting the longstanding belief that Bashkir horses are nonallergenic.

Objectives of the Study

• The research was aimed at investigating the presence of breed-specific allergens in horses, a belief held by some patients allergic to horses and breeders.
• The researchers also sought to test the claim that Bashkir horses are non-allergenic, thus safer for patients suffering from asthma.

Methodology Undertaken

• The researchers employed sodium dodecylsulfate-polyacrylamide gel electrophoresis and immunoblotting techniques. These procedures are used in the study of proteins and their reaction to allergens. Their ability to separate and identify proteins made them ideal for this allergen research.
• Dander (the material shed from the body of animals, similar to dandruff in humans) was collected from horses of several breeds and analyzed for its IgE-binding profiles. IgE is an antibody produced by the immune system when it reacts to allergens.

Findings of the Study

• The study revealed significant inter-breed and within-breed variation in the allergens present, meaning there is a considerable difference between and within breeds in terms of the allergens they produce. This disputes the earlier belief of certain horse breeds being allergen-specific.
• No breed-specific allergens were found, suggesting that no one breed is safer than the other regarding allergen production, and thus possibilities of allergic reactions.
• Contrary to popular belief, the allergenic content of dander from Bashkir horses was found to be similar to that of other breeds, indicating that they are not uniquely non-allergenic.
• The study also proposes that differences in scale production, rather than breed, could be the key reason behind varied sensitivities to horse breeds and individual horses. Scale production refers to the process of producing and shedding skin cells, including dander, which can vary greatly between individual animals.

Implications of the Study

• This study’s findings are significant in debunking unsubstantiated claims regarding the non-allergenic nature of certain horse breeds, thus helping patients with allergies and asthma make informed decisions.
• It also highlights the importance of understanding individual animal’s scale production as a more accurate predictor for possible allergic hazards, instead of relying on breed generalizations.