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Link between food allergy development and skin exposure

are on the rise in the U.S. and other developed countries.

In patients, food allergies appear as a variety of symptoms, ranging from mild to severe asthma.

Recent studies suggest that contact between inflamed skin and food proteins may trigger development.

A new study in the provides a link between , gastrointestinal inflammation, and food allergy.

Using a mouse model, Steven Ziegler and colleagues at the Benaroya Research Institute found that skin exposure to a combination of food antigen (peanut or egg proteins) and the pro-inflammatory molecule thymic stromal lymphopoietin (TSLP) results in food allergy.

Dermal application of TSLP and antigen resulted in a severe allergic reaction, including diarrhea and anaphylaxis, when mice ingested the antigen.

Skin sensitization to antigen required TSLP. However, development of allergic responses in the gut required IL-25, a protein that regulates the intestinal immune response.

Interestingly, mice given antigen orally prior to skin sensitization did not develop an allergic response.

The results from this study provide a mouse model for skin-induced food allergy development that could be used to test potential therapeutic interventions.

TITLE: Thymic stromal lymphopoietin-mediated epicutaneous inflammation promotes acute diarrhea and anaphylaxis

Source

Thymic stromal lymphopoietin–mediated epicutaneous inflammation promotes acute diarrhea and anaphylaxis. J Clin Invest. doi:10.1172/JCI77798.

Journal of Clinical Investigation