Exposure to dogs is associated with a decreased tumour necrosis factor-α-producing capacity in early life

Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology
M H J LappalainenJ Pekkanen

Abstract

It appears that contacts with furred animals early in life and already during gestation contribute to the immunological development in humans, but the mechanisms and relevant exposures are not clear. To investigate whether exposure to animals during pregnancy and the first year of life is associated with early immune development, determined as stimulated cytokine responses of children at birth and at age 1 year. Cord blood (n=228) and peripheral venous blood (n=200) samples 1 year after birth were collected and stimulated with Gram-positive superantigen Staphylococcal enterotoxin B, Gram-negative bacterial lipopolysaccharide (LPS) and the combination of mitogenic phorbol 12-myristate 13-acetate and calcium ionophore ionomycin (P/I) for 24 and 48 h. TNF-α, IFN-γ, IL-5, IL-8 and IL-10 responses were measured by ELISA. For each cytokine, the time-point with the highest response was chosen for further analyses. Animal contacts were surveyed by self-administered questionnaires. Dog ownership was associated with decreased TNF-α-producing capacity at birth (P/I: median 841 vs. 881 pg/10(6) WBC, P=0.05) and 1 year after birth (P/I: 1290 vs. 1530, P=0.01; LPS: 425 vs. 508, P=0.02). Associations remained significant after adjustment for ...Continue Reading

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Apr 18, 2013·American Journal of Respiratory and Critical Care Medicine·Marilyn HalonenAnne L Wright
Dec 4, 2013·Environmental Health : a Global Access Science Source·Lidia CasasJordi Sunyer
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May 1, 2021·International Journal of Environmental Research and Public Health·Azahara María García-SernaEva Morales

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