Childhood allergy is preceded by an absence of gut lactobacilli species and higher levels of atopy-related plasma chemokines.
Clin Exp Immunol
; 202(3): 288-299, 2020 12.
Article
en En
| MEDLINE
| ID: mdl-32652542
Alterations in the composition and reduced diversity of the infant microbiome are associated with allergic disease in children. Further, an altered microbiota is linked to immune dysregulation, including skewing of different T helper (Th) subsets, which is also seen in atopic individuals. The aim of this study was, therefore, to investigate the associations between gut lactobacilli and Th-related plasma factors in allergy development during childhood. A total of 194 children with known allergy status at 1 year of age were followed to 10 years of age. We used real-time polymerase chain reaction (PCR) to investigate the presence of three lactobacilli species (Lactobacillus casei, L. paracasei, L. rhamnosus) in infant fecal samples (collected between 1 week and 2 months of age) from a subgroup of children. Plasma chemokines and cytokines were quantified at 6 months and at 1, 2, 5 and 10 years of age with Luminex or enzyme-linked immunosorbent assay (ELISA). Fractional exhaled nitrogen oxide (FeNO) was measured and spirometry performed at 10 years of age. The data were analysed by non-parametric testing and a logistic regression model adjusted for parental allergy. An absence of these lactobacilli and higher levels of the chemokines BCA-1/CXCL13, CCL17/TARC, MIP-3α/CCL20 and MDC/CCL22 in plasma at 6 months of age preceded allergy development. The presence of lactobacilli associated with lower levels of atopy-related chemokines during infancy, together with higher levels of interferon (IFN)-γ and lower FeNO during later childhood. The results indicate that the presence of certain lactobacilli species in the infant gut may influence allergy-related parameters in the peripheral immune system, and thereby contribute to allergy protection.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Interferón gamma
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Quimiocinas
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Microbioma Gastrointestinal
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Hipersensibilidad
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Lactobacillus
Tipo de estudio:
Observational_studies
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Prognostic_studies
Límite:
Child
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Child, preschool
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Female
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Humans
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Infant
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Male
Idioma:
En
Revista:
Clin Exp Immunol
Año:
2020
Tipo del documento:
Article
País de afiliación:
Suecia
Pais de publicación:
Reino Unido