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Träfflista för sökning "WFRF:(Spencer R) srt2:(1995-1999)"

Search: WFRF:(Spencer R) > (1995-1999)

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  • Hedges, Spencer R., et al. (author)
  • Epithelial cytokine responses and mucosal cytokine networks
  • 1995
  • In: Trends in Microbiology. - 0966-842X. ; 3:7, s. 266-270
  • Research review (peer-reviewed)abstract
    • Localized at the border between the external environment and the internal tissue, epithelial cells are exposed to stimulants from two directions. Microorganisms in the lumen can activate the transcription of cytokine mRNA and cytokine secretion, and cytokines in the mucosal environment can modify endogenous and microbially induced epithelial cytokine responses. Epithelial cells thus actively participate in mucosal immunity and inflammation.
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  • Hedges, Spencer R., et al. (author)
  • Immunoregulatory cytokines modify Escherichia coli induced uroepithelial cell IL-6 and IL-8 responses
  • 1996
  • In: Cytokine. - : Elsevier BV. - 1043-4666. ; 8:9, s. 686-697
  • Journal article (peer-reviewed)abstract
    • This study analysed the effects of immunoregulatory cytokines on uroepithelial cell cytokine responses. The A-498 human kidney cell line was treated with the interleukins IL-2, IL-4, IL-5, IL-10, IL-12, IL-13, interferon gamma (IFN-α) and transforming growth factor beta (TGF-β1). Secreted IL-6 and IL-8 were quantitated by enzyme-linked immunoabsorbent assay (ELISA) and bioassay; IL-6 and IL-8 mRNA species were quantitated by reverse transcriptase polymerase chain reaction (RT-PCR). IL-4, IL-13, IFN-γ, and TGF-β1, but not IL-2, IL-5, IL-10 or IL-12, stimulated IL-6 secretion. At high concentrations, IL-4 and IL-13 stimulated low levels of IL-8 secretion. Immunoregulatory cytokines were analysed for their ability to modify the A-498 cells' IL-6 and IL-8 secretion in response to Escherichia coli. IL-5, IL-12, IL-13 and TGF-β1 additively enhanced the bacterially induced IL-6 secretion, but they did not affect IL-8 secretion. The strongest affects on uroepithelial cell IL-6 and IL-8 responses in the presence of bacteria were observed in conjunction with IL-4 and IFN-α. IL-4 induced IL-6 production in synergy with E. coli. IFN-α both enhanced and inhibited IL-6 and IL-8 responses in combination with E. coli, depending on the order of stimulant addition. The results demonstrate that immunoregulatory cytokines can modify the uroepithelial cell responses to bacteria in vitro. In this way T cells may regulate the cytokine responses of uroepithelial and possibly other mucosal epithelial cells in vivo.
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