David B. Lewis

Publication Details

  • INTERLEUKIN-4 EXPRESSED INSITU SELECTIVELY ALTERS THYMOCYTE DEVELOPMENT JOURNAL OF EXPERIMENTAL MEDICINE Lewis, D. B., Yu, C. C., Forbush, K. A., Carpenter, J., Sato, T. A., Grossman, A., Liggitt, D. H., Perlmutter, R. M. 1991; 173 (1): 89-100

    Abstract:

    Using a transgenic mouse model we show that increased intrathymic expression of interleukin 4 (IL-4) significantly perturbs the development of thymocytes. Transgenic double-positive (CD4+CD8+) thymocytes, which are present in dramatically reduced numbers, exhibit increased T cell receptor (TCR) expression and increased mobilization of calcium mediated by these receptors. In contrast, transgenic single-positive (CD4+CD8- and CD4-CD8+) thymocytes and peripheral T cells exhibit decreased TCR-mediated calcium mobilization. The development of CD4-CD8+ thymocytes is significantly perturbed by IL-4 expressed in vivo; only peripheral CD4+ T cells are found in significant numbers in transgenic mice, while CD4-CD8+ thymocytes are present in increased numbers, apparently because of their failure to emigrate to the periphery. In contrast to these selective effects on T cell development, no significant differences in the numbers of B cells or mast cells, or in the plasma levels of IgE and IgG1 are observed between transgenic and control mice. These observations suggest that IL-4 in vivo exerts its major effects locally rather than systemically, even when its expression is constitutively increased.

    View details for Web of Science ID A1991EP65900010

    View details for PubMedID 1824637

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