A CASE OF IgA NEPHROPATHY ASSOCIATED WITH FOOD ALLERGY

概要

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An 8-year-old boy with IgA nephropathy, who is hypersensitive since infancy to many foods including hen's eggs, cow's milk and soy beans, has been studied. Specific IgE antibodies to these foods were detected in his serum. The patient has taken small amounts of milk and eggs, and hematuria was noticed when he was 7 years old. After admission to our study, he was given a diet completely free of egg and milk proteins, and the amount of protein and red blood cells in the urine decreased gradually without drug therapy. After oral provocation tests with hen egg white or cow's milk, an increase in the protein/creatine ratio of morning urine was noticed. However, specific IgA antibodies to either egg white or cow's milk proteins could not be detected in his serum by the immunablotting technique. In this case, ingestion of egg or milk was suspected to have increased the urinary protein/creatinine ratio by a mechanism other than that mediated by specific IgA antibodies to these food antigens.
日本小児アレルギー学会の論文