PMID- 20501515 OWN - NLM STAT- MEDLINE DCOM- 20111021 LR - 20240109 IS - 1753-4267 (Electronic) IS - 1753-4259 (Linking) VI - 17 IP - 3 DP - 2011 Feb TI - Factors determining the spontaneous activation of splenic dendritic cells in culture. PG - 338-52 LID - 10.1177/1753425910371396 [doi] AB - Dendritic cells (DCs) serve as a link between the innate and adaptive immune systems. The activation state of DCs is crucial in this role. However, when DCs are isolated from lymphoid tissues, purified and placed in culture they undergo 'spontaneous' activation. The basis of this was explored, using up-regulation of DC surface MHC II, CD40, CD80 and CD86 as indicators of DC activation. No evidence was found for DC damage during isolation or for microbial products causing the activation. The culture activation of spleen DCs differed from that of Langerhans cells when released from E-cadherin-mediated adhesions, since E-cadherin was not detected and activation still occurred with beta-catenin null DCs. Much of the activation could be attributed to DC-DC interactions. Although increases in surface MHC II levels occurred under all culture conditions tested, the increase in expression of CD40, CD80 and CD86 was much less under culture conditions where such interactions were minimised. DC-to-DC contact under the artificial conditions of high DC concentration in culture induced the production of soluble factors and these, in turn, induced the up-regulation of co-stimulatory molecules on the DC surface. FAU - Vremec, David AU - Vremec D AD - The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3050, Australia. FAU - O'Keeffe, Meredith AU - O'Keeffe M FAU - Wilson, Anne AU - Wilson A FAU - Ferrero, Isabel AU - Ferrero I FAU - Koch, Ute AU - Koch U FAU - Radtke, Freddy AU - Radtke F FAU - Scott, Bernadette AU - Scott B FAU - Hertzog, Paul AU - Hertzog P FAU - Villadangos, Jose AU - Villadangos J FAU - Shortman, Ken AU - Shortman K LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20100525 PL - United States TA - Innate Immun JT - Innate immunity JID - 101469670 RN - 0 (Antigens, CD) RN - 0 (Cadherins) RN - 0 (Cytokines) RN - 0 (Histocompatibility Antigens Class II) RN - 0 (beta Catenin) SB - IM MH - Animals MH - Antigens, CD/genetics/*metabolism MH - Cadherins/metabolism MH - Cell Adhesion MH - *Cell Communication/immunology MH - Cell Differentiation MH - Cells, Cultured MH - Chimera MH - Cytokines/genetics/*metabolism MH - Dendritic Cells/immunology/*metabolism/pathology MH - Histocompatibility Antigens Class II/genetics/*metabolism MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Spleen MH - Up-Regulation/immunology MH - beta Catenin/genetics EDAT- 2010/05/27 06:00 MHDA- 2011/10/22 06:00 CRDT- 2010/05/27 06:00 PHST- 2010/05/27 06:00 [entrez] PHST- 2010/05/27 06:00 [pubmed] PHST- 2011/10/22 06:00 [medline] AID - 1753425910371396 [pii] AID - 10.1177/1753425910371396 [doi] PST - ppublish SO - Innate Immun. 2011 Feb;17(3):338-52. doi: 10.1177/1753425910371396. Epub 2010 May 25.