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Differences in innate immune function between allergic and nonallergic children: New insights into immune ontogeny
University of Western Australia.
Linköping University, Department of Clinical and Experimental Medicine. Linköping University, Faculty of Health Sciences.
Swansea University.
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2011 (English)In: JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY, ISSN 0091-6749, Vol. 127, no 2, 470-U1817 p.Article in journal (Refereed) Published
Abstract [en]

Background: Microbial products are of central interest in the modulation of allergic propensity. Objective: We sought to explore whether allergic children show differences in microbial Toll-like receptor (TLR)-mediated responses over their first 5 years of life. Methods: Mononuclear cells isolated from 35 allergic and 35 nonallergic children at birth and 1, 2.5, and 5 years of age were stimulated with TLR2-TLR9 ligands to study innate immune function and with allergens or mitogen to assess adaptive T-cell responses. Cytokine production was measured by using Luminex multiplexing technology. Results: Nonallergic children show progressive and significant age-related increases in innate cytokine responses (IL-1 beta, IL-6, TNF-alpha, and IL-10) to virtually all TLR ligands. This innate maturation corresponds with a parallel increase in adaptive T(H)1 (IFN-gamma) responses to allergens and mitogens. In contrast, allergic children show exaggerated innate responses at birth (P andlt; .01) but a relative decrease with age thereafter, so that by age 5 years, TLR responses are attenuated compared with those seen in nonallergic subjects (P andlt; .05). This early hyperresponsiveness in allergic subjects fails to translate to a corresponding maturation of T(H)1 function, which remains attenuated relative to that seen in nonallergic subjects but is associated with a characteristic age-dependent increase in allergen-specific T(H)2 responses (P andlt; .01). Conclusion: Our findings suggest significant differences in the developmental trajectory of innate immune function in children with allergic disease that might contribute to the recognized differences in postnatal adaptive T-cell immunity.

Place, publisher, year, edition, pages
Elsevier Science B.V., Amsterdam , 2011. Vol. 127, no 2, 470-U1817 p.
Keyword [en]
Toll-like receptor, ontogeny, innate immunity, allergic disease, children
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-66292DOI: 10.1016/j.jaci.2010.09.020ISI: 000286808000022OAI: diva2:403135
Available from: 2011-03-11 Created: 2011-03-11 Last updated: 2011-03-11

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