Correlations between worm burden and markers of Th1 and Th2 cell subset induction in an inbred strain of mouse infected with Trichuris muris
- PMID: 7877836
- DOI: 10.1111/pim.1993.15.10.595
Correlations between worm burden and markers of Th1 and Th2 cell subset induction in an inbred strain of mouse infected with Trichuris muris
Abstract
Helper T cell subset induction was examined within a single inbred strain of mouse (B10.D2/n) where individuals varied in their ability to expel the nematode parasite Trichuris muris. In this mouse strain approximately half of infected individuals resist infection whilst half are unable to expel the parasite and harbour chronic mature adult worm infections. We here assess various T cell and serological parameters in individual B10.D2/n mice infected with T. muris in relation to the number of parasites harboured. Worm burdens showed very significant negative correlations with five different parameters indicative of the selective expansion within the host of helper T cells of the Th2 subset. Thus, in vitro IL-5 and IL-9 production by restimulated mesenteric lymph node cells, total IgE levels, the early parasite-specific IgG1 response (all P < 0.01) and intestinal eosinophilia (P < 0.05), were all significantly negatively correlated with worm burden. In addition, levels of IL-3 were significantly greater in mice resistant to infection (P < 0.01). In contrast there was a significant positive correlation between worm burden and parasite-specific IgG2a levels (P < 0.05), IgG2a production being under the tight control of the Th1-specific cytokine IFN-gamma and thus a reliable marker for in vivo Th1 cell activation. The data demonstrates that an individual infected with T. muris is capable of mounting either a protective Th2-type response or an inappropriate Th1-type response.(ABSTRACT TRUNCATED AT 250 WORDS)
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