PMID- 25411201 OWN - NLM STAT- MEDLINE DCOM- 20160226 LR - 20240210 IS - 1550-6606 (Electronic) IS - 0022-1767 (Print) IS - 0022-1767 (Linking) VI - 194 IP - 1 DP - 2015 Jan 1 TI - Altered lymph node composition in diphtheria toxin receptor-based mouse models to ablate dendritic cells. PG - 307-15 LID - 10.4049/jimmunol.1401999 [doi] AB - Dendritic cells (DCs) are key regulators of innate and adaptive immunity. Our understanding of immune function has benefited greatly from mouse models allowing for selective ablation of DCs. Many such models rely on transgenic diphtheria toxin receptor (DTR) expression driven by DC-restricted promoters. This renders DCs sensitive to DT but is otherwise thought to have no effect on immune physiology. In this study, we report that, unexpectedly, mice in which DTR is expressed on conventional DCs display marked lymph node (LN) hypocellularity and reduced frequency of DCs in the same organs but not in spleen or nonlymphoid tissues. Intriguingly, in mixed bone marrow chimeras the phenotype conferred by DTR-expressing DCs is dominant over control bone marrow-derived cells, leading to small LNs and an overall paucity of DCs independently of the genetic ability to express DTR. The finding of alterations in LN composition and size independently of DT challenge suggests that caution must be exercised when interpreting results of experiments obtained with mouse models to inducibly deplete DCs. It further indicates that DTR, a member of the epidermal growth factor family, is biologically active in mice. Its use in cell ablation experiments needs to be considered in light of this activity. CI - Copyright (c) 2014 by The American Association of Immunologists, Inc. FAU - van Blijswijk, Janneke AU - van Blijswijk J AD - Immunobiology Laboratory, Cancer Research UK, London Research Institute, London WC2A 3LY, United Kingdom. FAU - Schraml, Barbara U AU - Schraml BU AD - Immunobiology Laboratory, Cancer Research UK, London Research Institute, London WC2A 3LY, United Kingdom. FAU - Rogers, Neil C AU - Rogers NC AD - Immunobiology Laboratory, Cancer Research UK, London Research Institute, London WC2A 3LY, United Kingdom. FAU - Whitney, Paul G AU - Whitney PG AD - Immunobiology Laboratory, Cancer Research UK, London Research Institute, London WC2A 3LY, United Kingdom. FAU - Zelenay, Santiago AU - Zelenay S AD - Immunobiology Laboratory, Cancer Research UK, London Research Institute, London WC2A 3LY, United Kingdom. FAU - Acton, Sophie E AU - Acton SE AD - Immunobiology Laboratory, Cancer Research UK, London Research Institute, London WC2A 3LY, United Kingdom. FAU - Reis e Sousa, Caetano AU - Reis e Sousa C AD - Immunobiology Laboratory, Cancer Research UK, London Research Institute, London WC2A 3LY, United Kingdom caetano@cancer.org.uk. LA - eng GR - 15689/CRUK_/Cancer Research UK/United Kingdom GR - A3598/CRUK_/Cancer Research UK/United Kingdom GR - WT089009MA/WT_/Wellcome Trust/United Kingdom GR - 089009/WT_/Wellcome Trust/United Kingdom GR - A15689/CRUK_/Cancer Research UK/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20141119 PL - United States TA - J Immunol JT - Journal of immunology (Baltimore, Md. : 1950) JID - 2985117R RN - 0 (CD11c Antigen) RN - 0 (Clec9a protein, mouse) RN - 0 (Diphtheria Toxin) RN - 0 (Heparin-binding EGF-like Growth Factor) RN - 0 (Lectins, C-Type) RN - 0 (Receptors, Immunologic) SB - IM MH - Animals MH - Bone Marrow Cells/*cytology/immunology MH - CD11c Antigen/metabolism MH - Dendritic Cells/cytology/*immunology MH - Diphtheria Toxin/immunology MH - Heparin-binding EGF-like Growth Factor/biosynthesis/*immunology MH - Lectins, C-Type/genetics MH - Lymph Nodes/cytology/immunology/*pathology MH - Mice MH - Mice, Inbred C57BL MH - Mice, Transgenic MH - Models, Animal MH - Receptors, Immunologic/genetics MH - Spleen/cytology/immunology PMC - PMC4272857 MID - EMS60860 OID - NLM: EMS60860 EDAT- 2014/11/21 06:00 MHDA- 2016/02/27 06:00 PMCR- 2015/07/01 CRDT- 2014/11/21 06:00 PHST- 2014/11/21 06:00 [entrez] PHST- 2014/11/21 06:00 [pubmed] PHST- 2016/02/27 06:00 [medline] PHST- 2015/07/01 00:00 [pmc-release] AID - jimmunol.1401999 [pii] AID - 10.4049/jimmunol.1401999 [doi] PST - ppublish SO - J Immunol. 2015 Jan 1;194(1):307-15. doi: 10.4049/jimmunol.1401999. Epub 2014 Nov 19.