Acute in vivo exposure to interferon-γ enables resident brain dendritic cells to become effective antigen presenting cells Academic Article uri icon

Overview

MeSH Major

  • Antigen-Presenting Cells
  • Brain
  • Dendritic Cells
  • Interferon-gamma

abstract

  • Dendritic cells (DC) are the professional antigen presenting cells (APC) that bridge the innate and adaptive immune system. Previously, in a CD11c/EYFP transgenic mouse developed to study DC functions, we anatomically mapped and phenotypically characterized a discrete population of EYFP(+) cells within the microglia that we termed brain dendritic cells (bDC). In this study, we advanced our knowledge of the function of these cells in the CD11c/EYFP transgenic mouse and its chimeras, using acute stimuli of stereotaxically inoculated IFNgamma or IL-4 into the CNS. The administration of IFNgamma increased the number of EYFP(+)bDC but did not recruit peripheral DC into the CNS. IFNgamma, but not IL-4, upregulated the expression levels of major histocompatibility class II (MHC-II). In addition, IFNgamma-activated EYFP(+)bDC induced antigen-specific naïve CD4 T cells to proliferate and secrete Th1/Th17 cytokines. Activated bDC were also able to stimulate naïve CD8 T cells. Collectively, these data reveal the Th1 cytokine IFNgamma, but not the Th2 cytokine IL4, induces bDC to up-regulate MHC-II and become competent APC.

publication date

  • December 8, 2009

Research

keywords

  • Academic Article

Identity

Language

  • eng

PubMed Central ID

  • PMC2791588

Digital Object Identifier (DOI)

  • 10.1073/pnas.0911509106

PubMed ID

  • 19906988

Additional Document Info

start page

  • 20918

end page

  • 23

volume

  • 106

number

  • 49