The DOI matches its Crossref record; 7 of the 7 references it cites were found in a registry or an index.
Plasmacytoid dendritic cells from mouse tumor-draining lymph nodes directly activate mature Tregs via indoleamine 2,3-dioxygenase
Open accessAbstract
A small population of plasmacytoid DCs (pDCs) in mouse tumor-draining LNs can express the immunoregulatory enzyme indoleamine 2,3-dioxygenase (IDO). We show that these IDO+ pDCs directly activate resting CD4+CD25+Foxp3+ Tregs for potent suppressor activity. In vivo, Tregs isolated from tumor-draining LNs were constitutively activated and suppressed antigen-specific T cells immediately ex vivo. In vitro, IDO+ pDCs from tumor-draining LNs rapidly activated resting Tregs from non-tumor-bearing hosts without the need for mitogen or exogenous anti-CD3 crosslinking. Treg activation by IDO+ pDCs was MHC restricted, required an intact amino acid-responsive GCN2 pathway in the Tregs, and was prevented by CTLA4 blockade. Tregs activated by IDO markedly upregulated programmed cell death 1 ligand 1 (PD-L1) and PD-L2 expression on target DCs, and the ability of Tregs to suppress target T cell proliferation was abrogated by antibodies against the programmed cell death 1/PD-L (PD-1/PD-L) pathway. In contrast, Tregs activated by anti-CD3 crosslinking did not cause upregulation of PD-Ls, and suppression by these cells was unaffected by blocking the PD-1/PD-L pathway. Tregs isolated from tumor-draining LNs in vivo showed potent PD-1/PD-L-mediated suppression, which was selectively lost when tumors were grown in IDO-deficient hosts. We hypothesize that IDO+ pDCs create a profoundly suppressive microenvironment within tumor-draining LNs via constitutive activation of Tregs.
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Uyttenhove, C., Pilotte, L., Théate, I., Stroobant, V., Colau, D., Parmentier, N., Boon, T., & Van den Eynde, B. J. (2003) · Nature Medicine · doi:10.1038/nm934 · Cited by 2,305
CD4+CD25+ Immunoregulatory T Cells
McHugh, R. S., Whitters, M. J., Piccirillo, C. A., Young, D. A., Shevach, E. M., Collins, M., & Byrne, M. C. (2002) · Immunity · doi:10.1016/s1074-7613(02)00280-7 · Cited by 1,395
Cancer despite immunosurveillance: immunoselection and immunosubversion
Zitvogel, L., Tesniere, A., & Kroemer, G. (2006) · Nature reviews. Immunology · doi:10.1038/nri1936 · Cited by 1,324
Blockade of B7-H1 improves myeloid dendritic cell-mediated antitumor immunity
Curiel, T. J., Wei, S., Dong, H., Alvarez, X., Cheng, P., Mottram, P., Krzysiek, R., Knutson, K. L., Daniel, B., Zimmermann, M. C., et al. (2003) · Nature Medicine · doi:10.1038/nm863 · Cited by 1,314
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Transient expression of FOXP3 in human activated nonregulatory CD4 + T cells
Wang, J., Ioan‐Facsinay, A., van der Voort, E. I. H., Huizinga, T. W. J., & Toes, R. E. M. (2007) · European Journal of Immunology · doi:10.1002/eji.200636435 · Cited by 1,011
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. (2004) · Journal of Clinical Investigation · doi:10.1172/jci21583 · Cited by 852
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PD-1 and Its Ligands in Tolerance and Immunity
Keir, M. E., Butte, M. J., Freeman, G. J., & Sharpe, A. H. (2008) · Annual Review of Immunology · doi:10.1146/annurev.immunol.26.021607.090331 · Cited by 5,378
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Yarchoan, M., Johnson, B. A., Lutz, E. R., Laheru, D. A., & Jaffee, E. M. (2017) · Nature Reviews Cancer · doi:10.1038/nrc.2016.154 · Cited by 997
Metadata
- Authors
- Sharma, M. D., Baban, B., Chandler, P., Hou, D.-Y., Singh, N., Yagita, H., Azuma, M., Blazar, B. R., Mellor, A. L., & Munn, D. H.
- Venue
- Journal of Clinical Investigation
- Published
- 2007-09-04
- Volume
- 117
- Issue
- 9
- Pages
- 2570-2582
- ISSN
- 0021-9738 (ISSN-L)
- OpenAlex
- W1991243877
- Cited by
- 792
- References
- 7
- FWCI
- 18.43
- Type
- journal article
- Language
- en
- Open access
- bronze
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