Cited by 877Immunotherapy and Immune ResponsesT-cell and B-cell ImmunologyCancer Immunotherapy and Biomarkers

Expression of indoleamine 2,3-dioxygenase by plasmacytoid dendritic cells in tumor-draining lymph nodes

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Munn, David H., Sharma, Madhav D., Hou, Deyan, Baban, Babak, Lee, Jeffrey R., Antonia, Scott J., Messina, Jane L., Chandler, Phillip +2 more·2004·Journal of Clinical Investigation

Abstract

One mechanism contributing to immunologic unresponsiveness toward tumors may be presentation of tumor antigens by tolerogenic host APCs.We show that mouse tumor-draining LNs (TDLNs) contained a subset of plasmacytoid DCs (pDCs) that constitutively expressed immunosuppressive levels of the enzyme indoleamine 2,3-dioxygenase (IDO).Despite comprising only 0.5% of LN cells, these pDCs in vitro potently suppressed T cell responses to antigens presented by the pDCs themselves and also, in a dominant fashion, suppressed T cell responses to third-party antigens presented by nonsuppressive APCs.Adoptive transfer of DCs from TDLNs into naive hosts created profound local T cell anergy, specifically toward antigens expressed by the transferred DCs.Anergy was prevented by targeted disruption of the IDO gene in the DCs or by administration of the IDO inhibitor drug 1-methyl-D-tryptophan to recipient mice.Within the population of pDCs, the majority of the functional IDO-mediated suppressor activity segregated with a novel subset of pDCs coexpressing the B-lineage marker CD19.We hypothesize that IDO-mediated suppression by pDCs in TDLNs creates a local microenvironment that is potently suppressive of host antitumor T cell responses.Nonstandard abbreviations used: indoleamine 2,3-dioxygenase (IDO); 1-methyl-D-tryptophan (1MT); mixed leukocyte reaction (MLR); plasmacytoid DC (pDC); regulatory T cell (Treg); T cell receptor (TCR); tumor-draining LN (TDLN). Conflict of interest:The authors have declared that no conflict of interest exists.

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Authors
Munn, D. H., Sharma, M. D., Hou, D., Baban, B., Lee, J. R., Antonia, S. J., Messina, J. L., Chandler, P., Koni, P. A., & Mellor, A. L.
Affiliations
  • Augusta University (US)
  • University of South Florida (US)
Corresponding author
Munn, David H.
Venue
Journal of Clinical Investigation
Published
2004-07-15
Volume
114
Issue
2
Pages
280-290
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2143565660
Cited by
852
References
85
Citations by year
2026: 13 · 2025: 12 · 2024: 24 · 2023: 15 · 2022: 32 · 2021: 37 · 2020: 34 · 2019: 29 · 2018: 31 · 2017: 40 · 2016: 27 · 2015: 45 · 2014: 38 · 2013: 53 · 2012: 39
FWCI
19.19
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Carlos and Marguerite Mason Trust
  • National Institutes of Health
  • National Cancer Institute (R01CA096651, R01 CA103220)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD041187)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
Keywords
indoleamine 2,3-dioxygenase, plasmacytoid dendritic cells, tumor-draining lymph nodes, immunosuppression, T cell anergy, tumor antigen presentation, CD19, 1-methyl-D-tryptophan, antitumor immunity, regulatory T cells, mixed lymphocyte reaction
MeSH terms
Animals, Antigen-Presenting Cells, Dendritic Cells, Female, Humans, Immunosuppression Therapy, Lymph Nodes, Lymphocyte Activation, Mice, Inbred Strains, Neoplasms, Random Allocation, T-Lymphocytes, Tryptophan Oxygenase, Survival Rate, Mice, Knockout, Antigens, CD19, Adoptive Transfer, CD11c Antigen, Indoleamine-Pyrrole 2,3,-Dioxygenase, Mice

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