Differential maturation of murine bone-marrow derived dendritic cells with lipopolysaccharide and tumor necrosis factor-α

Philip A. Efron, Hironori Tsujimoto, Frances R. Bahjat, Ricardo Ungaro, Justin Debernardis, Cynthia Tannahill, Henry V. Baker, Carl K. Edwards, Lyle L. Moldawer

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

Dendritic cells (DCs) play a key role in the interface between the innate and acquired immune systems. In response to both exogenous as well as endogenous signals, DCs undergo a programmed maturation to become an efficient, antigen-presenting cell. Yet little is known regarding the differential responses by endogenous versus exogenous stimuli on DC maturation. In the present report, we have compared the phenotypic, functional, and genome-wide expression responses associated with maturation by bone marrow derived DCs to either an endogenous danger signal, tumor necrosis factor-α (TNF-α), or a microbial product, bacterial lipopolysaccharide (LPS). Examination of the cell surface expression of DCs as well as cytokine production demonstrated that patterns of DC maturation varied dramatically depending upon the stimulus. Whereas LPS was highly effective in terms of inducing phenotypic and functional maturation, TNF-α exposure produced a phenotypically distinct DC. Gene expression patterns in DCs 6 and 24 h after LPS and TNF-α exposure revealed that these activation signals produce fundamentally different genomic responses. Supervised analysis revealed that the expression of 929 probe sets discriminated among the treatment groups, and the patterns of gene expression in TNF-α stimulated DCs were more similar to unstimulated cells at both 6 and 24 h post-stimulation than to LPS-stimulated cells at the same time points. These findings reveal that DCs are capable of a varying phenotypic response to different antigens and endogenous signals.

Original languageEnglish (US)
Pages (from-to)145-160
Number of pages16
JournalJournal of Endotoxin Research
Volume11
Issue number3
DOIs
StatePublished - Aug 23 2005

Keywords

  • Cytokines
  • Gene expression analysis
  • Inflammation

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Molecular Biology
  • Cell Biology
  • Infectious Diseases

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