Crossref journal-article
Rockefeller University Press
The Journal of Experimental Medicine (291)
Abstract

Plasmacytoid dendritic cells (PDCs) are a unique leukocyte population capable of secreting high levels of type I interferon (IFN) in response to viruses and bacterial stimuli. In vitro experiments have shown that upon maturation, human and murine PDCs develop into potent immunostimulatory cells; however, their ability to prime an immune response in vivo remains to be addressed. We report that CpG-matured murine PDCs are capable of eliciting in naive mice antigen-specific CTLs against endogenous antigens as well as exogenous peptides, but not against an exogenous antigen. Type I IFN is not required for priming, as injection of CpG-matured PDCs into type I IFN receptor–deficient mice elicits functional CTL responses. Mature PDCs prime CTLs that secrete IFN-γ and protect mice from a tumor challenge. In contrast, immature PDCs are unable to prime antigen-specific CTLs. However, mice injected with immature PDCs are fully responsive to secondary antigenic challenges, suggesting that PDCs have not induced long-lasting tolerance via anergic or regulatory T cells. Our results underline the heterogeneity and plasticity of different antigen-presenting cells, and reveal an important role of mature PDCs in priming CD8 responses to endogenous antigens, in addition to their previously reported ability to modulate antiviral responses via type I IFN.

Bibliography

Salio, M., Palmowski, M. J., Atzberger, A., Hermans, I. F., & Cerundolo, V. (2004). CpG-matured Murine Plasmacytoid Dendritic Cells Are Capable of In Vivo Priming of Functional CD8 T Cell Responses to Endogenous but Not Exogenous Antigens. The Journal of Experimental Medicine, 199(4), 567–579.

Authors 5
  1. Mariolina Salio (first)
  2. Michael J. Palmowski (additional)
  3. Ann Atzberger (additional)
  4. Ian F. Hermans (additional)
  5. Vincenzo Cerundolo (additional)
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Dates
Type When
Created 21 years, 6 months ago (Feb. 17, 2004, 6:23 p.m.)
Deposited 2 years, 1 month ago (July 25, 2023, 8:39 a.m.)
Indexed 1 month ago (July 24, 2025, 7:57 a.m.)
Issued 21 years, 6 months ago (Feb. 16, 2004)
Published 21 years, 6 months ago (Feb. 16, 2004)
Published Online 21 years, 6 months ago (Feb. 17, 2004)
Published Print 21 years, 6 months ago (Feb. 16, 2004)
Funders 0

None

@article{Salio_2004, title={CpG-matured Murine Plasmacytoid Dendritic Cells Are Capable of In Vivo Priming of Functional CD8 T Cell Responses to Endogenous but Not Exogenous Antigens}, volume={199}, ISSN={0022-1007}, url={http://dx.doi.org/10.1084/jem.20031059}, DOI={10.1084/jem.20031059}, number={4}, journal={The Journal of Experimental Medicine}, publisher={Rockefeller University Press}, author={Salio, Mariolina and Palmowski, Michael J. and Atzberger, Ann and Hermans, Ian F. and Cerundolo, Vincenzo}, year={2004}, month=feb, pages={567–579} }