PMID- 12734352 OWN - NLM STAT- MEDLINE DCOM- 20030826 LR - 20190516 IS - 0022-1767 (Print) IS - 0022-1767 (Linking) VI - 170 IP - 10 DP - 2003 May 15 TI - Early IL-2 production by mouse dendritic cells is the result of microbial-induced priming. PG - 5075-81 AB - Dendritic cells (DCs) are professional APCs able to initiate innate and adaptive immune responses against invading pathogens. Different properties such as the efficient Ag processing machinery, the high levels of expression of costimulatory molecules and peptide-MHC complexes, and the production of cytokines contribute in making DCs potent stimulators of naive T cell responses. Recently we have observed that DCs are able to produce IL-2 following bacterial stimulation, and we have demonstrated that this particular cytokine is a key molecule conferring to early bacterial activated DCs unique T cell priming capacity. In the present study we show that many different microbial stimuli, but not inflammatory cytokines, are able to stimulate DCs to produce IL-2, indicating that DCs can distinguish a cytokine-mediated inflammatory process from the actual presence of an infection. The capacity to produce IL-2 following a microbial stimuli encounter is a feature shared by diverse DC subtypes in vivo, such as CD8 alpha(+) and CD8 alpha(-) splenic DCs and epidermal Langerhans cells. When early activated DCs interact with T cells, IL-2 produced by DCs is enriched at the site of cell-cell contact, confirming the importance of DCs-derived IL-2 in T cell activation. FAU - Granucci, Francesca AU - Granucci F AD - Department of Biotechnology and Bioscience, University of Milano-Bicocca, Milan, Italy. FAU - Feau, Sonia AU - Feau S FAU - Angeli, Veronique AU - Angeli V FAU - Trottein, Francois AU - Trottein F FAU - Ricciardi-Castagnoli, Paola AU - Ricciardi-Castagnoli P LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Immunol JT - Journal of immunology (Baltimore, Md. : 1950) JID - 2985117R RN - 0 (Interleukin-2) RN - 0 (Lipopolysaccharides) RN - 0 (Peptidoglycan) RN - 0 (Teichoic Acids) RN - 56411-57-5 (lipoteichoic acid) RN - 9010-72-4 (Zymosan) SB - IM MH - Animals MH - Cell Communication/immunology MH - Cell Line MH - Cells, Cultured MH - Dendritic Cells/*immunology/metabolism/*microbiology MH - Escherichia coli/immunology MH - *Immunization/methods MH - Injections, Intraperitoneal MH - Interleukin-2/*biosynthesis/metabolism MH - Lipopolysaccharides/administration & dosage/immunology MH - Lymphoid Tissue/immunology/metabolism MH - Melanoma, Experimental MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Peptidoglycan/immunology MH - Phagocytosis/immunology MH - T-Lymphocytes/immunology MH - Teichoic Acids/immunology MH - Tumor Cells, Cultured MH - Zymosan/immunology EDAT- 2003/05/08 05:00 MHDA- 2003/08/27 05:00 CRDT- 2003/05/08 05:00 PHST- 2003/05/08 05:00 [pubmed] PHST- 2003/08/27 05:00 [medline] PHST- 2003/05/08 05:00 [entrez] AID - 10.4049/jimmunol.170.10.5075 [doi] PST - ppublish SO - J Immunol. 2003 May 15;170(10):5075-81. doi: 10.4049/jimmunol.170.10.5075.