Abstract

One highly desirable objective of preventive medicine is to find predictive markers that could identify neonates who are at risk of developing atopic diseases. However, no one laboratory test is sufficiently sensitive and specific to be used for this purpose. The objective of this study was to evaluate the use of an in vitro IgE synthesis by cord blood lymphocytes of neonates with or without a family history of atopy. Cord blood mononuclear cells (CBMC) of 11 neonates with a family history of atopy and 9 neonates without a family history of atopy were incubated for 48 hr with human recombinant IL4 (hrIL4) in Petri plates. Cord blood lymphocytes (nonadherent cells) were then washed and incubated for an additional 9 days with various stimuli. hrIL4, hrIL4 + human recombinant interferon-gamma (hrIFNg), hrIL4 + anti-IL4 antibody (ab), hrIL-4 + antiCD40 ab, hrIL4 + anti-CD40 ab + betalactoglobulin (BLG) hrIL4 + anti-IFNg ab. Unstimulated cultures were included as negative controls. IgE concentrations in sera w...

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