Cutting edge: the immunostimulatory activity of the lung surfactant protein-A involves Toll-like receptor 4.

نویسندگان

  • Loïc Guillot
  • Viviane Balloy
  • Francis X McCormack
  • Douglas T Golenbock
  • Michel Chignard
  • Mustapha Si-Tahar
چکیده

The collectin surfactant protein-A (SP-A) is involved in the innate host defense and the regulation of inflammatory processes in the lung. In this work we investigated the molecular mechanisms related to the immunostimulatory activity of SP-A using macrophages from C3H/HeJ mice, which carry an inactivating mutation in the Toll-like receptor (TLR)4 gene, and TLR4-transfected Chinese hamster ovary cells. We demonstrate that SP-A-induced activation of the NF-kappaB signaling pathway and up-regulation of cytokine synthesis such as TNF-alpha and IL-10 are critically dependent on the TLR4 functional complex. These findings support the concept that TLR4 is a pattern recognition receptor that signals in response to both foreign pathogens and endogenous host mediators.

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عنوان ژورنال:
  • Journal of immunology

دوره 168 12  شماره 

صفحات  -

تاریخ انتشار 2002