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  • Title: Potentiation of IgE responses to third-party antigens mediated by Ascaris suum soluble products.
    Author: Lee TD, McGibbon A.
    Journal: Int Arch Allergy Immunol; 1993; 102(2):185-90. PubMed ID: 8400897.
    Abstract:
    A reductive approach was used to examine the potentiation of IgE responses by nematode infection. Ascaris homogenized extract, Ascaris pseudocoelomic (body) fluid (ABF) and purified Ascaris allergen (ABA) were tested for their ability to act as protein carriers and as mediators of potentiated IgE responses to third-party (ovalbumin; OVA) responses. All three nematode products were excellent protein carriers for the hapten dinitrophenol and showed significantly better activity in this respect than OVA. Neither ABF nor ABA enhanced the level of the IgE response to the third-party antigen but both prolonged the response markedly. ABF, but not ABA, induced high levels of total circulating IgE when given at the same time as OVA with alum. The data suggest that the enhancement and prolongation of IgE responses by nematodes may be two separate but related activities.
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