Food allergens and basophil histamine release in recurrent aphthous stomatitis.

The leukocytes from sixty patients with recurrent aphthous stomatitis were tested for histamine release in response to environmental and food antigens. Eighteen patients (30 percent of the population studied) were atopic, and this history of respiratory allergy was confirmed by an in vitro histamine release assay. The nonatopic patients with recurrent aphthous stomatitis had a significantly higher incidence of in vitro histamine release to foods than did control subjects. The leukocytes from twenty-three patients (38 percent) released histamine to food antigens. Patients eliminated foodstuffs in a double-blind trial to correlate the in vitro histamine release to the development of oral ulcers. Only 30 percent of the patients had a decreased incidence of ulcers after eliminating foods which had induced in vitro histamine release. On rechallenge in the double-blind trial, 30 percent of the foods which caused histamine release also correlated to increased incidence of oral lesions. In eight patients ingestion of certain foodstuffs was correlated to oral ulceration by food diaries and elimination-rechallenge in an open-trial basis. However, dietary manipulation did not completely eliminate the ulceration in any of the patients. The results suggest that food sensitivity may play a minor role in the development of recurrent aphthous stomatitis.