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Maternal immunization downregulates offspring TCD4 regulatory cells (Tregs) thymic maturation without implications for allergy inhibition
Author(s) -
Oliveira Marília Garcia,
Lira Aline Aparecida de Lima,
Sgnotto Fábio da Ressureição,
Inoue Amanda Harumi Sabô,
Beltrame Giovanna Rossi,
da Silva Débora,
Menghini Ricardo Palamar,
Duarte Alberto José da Silva,
Victor Jefferson Russo
Publication year - 2018
Publication title -
scandinavian journal of immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.934
H-Index - 88
eISSN - 1365-3083
pISSN - 0300-9475
DOI - 10.1111/sji.12721
Subject(s) - offspring , immunization , immunology , allergy , spleen , medicine , immune system , biology , pregnancy , genetics
The regulation of offspring allergy development mediated by maternal immunization was evidenced by several groups, and this mechanism seems to involve the induction of regulatory T cells (Tregs) on offspring. Here, we aimed to evaluate whether the effect of maternal immunization on offspring Tregs occurs as a result of peripheral or central modulation. Briefly, C57 BL /6 female mice were immunized with OVA in Alum or Alum alone and boosted with OVA in saline or saline only after 10 and 20 days. Non‐immunized offspring serum, thymus and spleen were evaluated at 3 or 20 days old, and some groups of pups were submitted to neonatal OVA ‐immunization protocol for the subsequent evaluation of antibody production and allergic response. Our experimental protocol could be validated because maternal OVA ‐immunization inhibited offspring allergic response as evidenced by the suppression of offspring IgE production and allergic lung inflammation. Interestingly, maternal immunization reduced the frequency of offspring thymic Tregs with an opposite effect on spleen Tregs. Furthermore, after neonatal immunization, the frequency of lung‐infiltrated Tregs was also augmented on offspring from immunized mothers. In conclusion, maternal OVA ‐immunization can inhibit the thymic maturation of offspring Tregs without implications on peripheral Tregs induction and allergy inhibition.