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Lluis, A.* ; Ballenberger, N.* ; Illi, S.* ; Schieck, M.* ; Kabesch, M.* ; Illig, T. ; Schleich, I.* ; von Mutius, E.* ; Schaub, B.*

Regulation of TH17 markers early in life through maternal farm exposure.

J. Allergy Clin. Immunol. 133, 864-871 (2014)
Open Access Green as soon as Postprint is submitted to ZB.
Background Previous studies suggested that maternal farm exposure during pregnancy modulates early immune development toward an allergy-protective status potentially mediated by TH1 or regulatory T (Treg) cells. However, the underlying mechanisms might involve immune modulation of additional T-cell populations, such as TH17 cells, influenced by genetic predisposition. Objective We examined the role of maternal farm exposure and genetic predisposition on TH17 cell responses to innate and adaptive immune stimulation in cord blood. Methods Eighty-four pregnant mothers were recruited before delivery. Detailed questionnaires (60 nonfarming mother, 22 farming mothers, and 2 exclusions) assessed farming exposures. Cord blood was stimulated with lipid A, peptidoglycan (Ppg), or PHA. TH17 lineage (retinoic acid receptor-related orphan receptor C [RORC], retinoic acid receptor-related orphan receptor α [RORA], IL-23 receptor [IL23R], IL17, IL17F, and IL22) and Treg cell markers (forkhead box protein 3 [FOXP3], lymphocyte activation gene 3 [LAG3], and glucocorticoid-induced TNF receptor [GITR]) were assessed at the mRNA level. TH17/Treg/T H1/TH2 cytokines and 7 single nucleotide polymorphisms within the TH17 lineage (RORC, IL23R, and IL17) were examined. Results TH17 lineage mRNA markers were expressed at birth at low concentrations independent of maternal farm exposure. A positive correlation between TH17 lineage markers and FOXP3 (mRNA) was observed on stimulation (nonfarming mothers: lipid A, Ppg, and PHA; farming mothers: Ppg and PHA), influenced by maternal farming. Specific single nucleotide polymorphisms within the TH17 lineage genes influenced gene expression of T H17 and Treg cell markers and cytokine secretion. Conclusions Gene expression of TH17 lineage markers in cord blood was not influenced by maternal farming. Yet TH17 and Treg cell markers were positively correlated and influenced by maternal farm exposure. Our data suggest that prenatal exposures and genetic predisposition play a role during early T H17 immune maturation, potentially regulating the development of immune-mediated diseases, such as childhood asthma.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Cord Blood ; Cytokines ; Farming ; Innate ; Regulatory T Cells ; Single Nucleotide Polymorphism ; T H17 Cells; Ror-gamma-t; Childhood Asthma; Cell-differentiation; Atopic Sensitization; Milk Consumption; Retinoic Acid; Messenger-rna; Ige Levels; In-vivo; Association
ISSN (print) / ISBN 0091-6749
e-ISSN 1097-6825
Quellenangaben Volume: 133, Issue: 3, Pages: 864-871 Article Number: , Supplement: ,
Publisher Elsevier
Publishing Place Amsterdam [u.a.]
Reviewing status Peer reviewed