Serum Zinc and Secretory IgA Levels Are Important Factors in Children with Food Allergy
2015
FEBRUARY 2015 AB60 Abstracts S A T U R D A Y 191 Serum Zinc and
Secretory IgALevels Are Important Factors in Children with
Food AllergyYosuke Baba, MD, PhD, Reina Yokota, MD, Hiromi Yagisawa, MD, Susumu Yamazaki, MD, Asuka Ishida, MD, Eisuke Inage, MD, PhD, Mari Mori, MD, PhD, Yoshikazu Ohtsuka, MD, PhD, Toshiaki Shimizu, MD, PhD; Department of Pediatrics and
Adolescent Medicine, Juntendo University Faculty of Medicine, Tokyo, Japan, Department of Pediatrics, Juntendo University Shizuoka Hospital, Shizuoka, Japan. RATIONALE: Zinc is an
essential nutrientand its deficiency causes malnutrition and results in defects in innate and
acquired immune responses. Also, zinc is important for highly proliferating cells, especially in the immune system and influences both innate and acquired immune functions. However, the precise roles and molecular mechanisms of zinc’s function in
allergic responsehave not been clarified. On the other hand, the IgA antibody is massively produced in the intestinal
Peyer’s patches, and the
secretory IgA(sIgA) plays an important role on mucosal immune responses. It is considered that sIgA regulates the cause of allergic reactions. We studied serum zinc levels and sIgA levels in children with
food allergiesand studied their relationship with allergy symptoms. METHODS: It is a retrospective study using medical records of infants (from 6 months to 6 years old) who had been admitted to our hospitals. We classified the groups according to the results of physical examinations with or without allergic symptom (eczema, wheezing,
food allergy). In addition, we investigated thewhite blood cell counts (eosinophils and basophils) and the serum levels of specific IgE, total IgA, sIgA, TARC (thymus and activation-regulated chemokine), and zinc. RESULTS: Children who were low levels in sIgA and serum zinc have past histories of atopic dermatitis, and their serum levels of specific IgE was significantly higher (p50.013) but their serum IgA level was significantly lower (p50.038) compared with children who does not have allergic symptoms. CONCLUSIONS:
Secretory IgAlevels and zinc levels are also important to the onset of allergic reactions.
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