Measurement of T-helper cytokines secreted by cord blood mononuclear cells in response to allergens - PubMed (original) (raw)
Measurement of T-helper cytokines secreted by cord blood mononuclear cells in response to allergens
G Devereux et al. J Immunol Methods. 2000.
Abstract
It has been proposed that in utero factors may predispose towards the development of childhood atopy. To test this hypothesis, it will be necessary to measure T-helper cell (Th) cytokines secreted by human cord blood mononuclear cells (CBMC) stimulated by allergens. However, to date, it has proven impossible to measure allergen-specific CBMC secretion of the key Th cytokine interleukin-4 (IL-4) using conventional sandwich ELISA techniques. We report for the first time the successful measurement of IL-4 secreted by CBMC stimulated by the allergens timothy grass pollen and house dust mite extract. The method is an adaptation of a novel cell-based ELISA (celELISA), which demonstrated an increased (up to 20-fold) sensitivity to detect IL-4. The method is simple, precise, is no more costly than a conventional ELISA, and can identify individuals in a general population whose CBMC exhibit different cytokine biases in response to allergens. The frequency distribution of IL-4 and interferon-gamma (IFN-gamma) CBMC responses to allergens in the general population approximates to a log-normal distribution, which will permit the application of linear regression techniques in the identification of in utero factors which influence Th bias.
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