PMID- 19941109 OWN - NLM STAT- MEDLINE DCOM- 20100202 LR - 20131121 IS - 1940-6029 (Electronic) IS - 1064-3745 (Linking) VI - 595 DP - 2010 TI - Pharmacological modification of dendritic cells to promote their tolerogenicity in transplantation. PG - 135-48 LID - 10.1007/978-1-60761-421-0_8 [doi] AB - Dendritic cells (DCs) are uniquely specialized antigen-presenting cells (APC) that play critical roles in both the stimulation and regulation of immune responses, including T-cell responses to transplanted organs. The inherent tolerogenicity of non-activated or "immature" DCs is well documented. Importantly, the infusion of DCs that are made resistant to activating inflammatory stimuli by "conditioning" through exposure to clinically approved immunosuppressants, such as corticosteroids, deoxyspergualin, and recently, rapamycin (RAPA), has produced encouraging outcomes in experimental models. Indeed, the infusion of RAPA-conditioned, host-derived DCs, pulsed with alloantigen, prolongs allograft survival. In particular, when the RAPA-conditioned DCs are delivered repeatedly or in combination with a short course of immunosuppression indefinite allograft survival is observed, typically associated with increased Foxp3(+) T-regulatory cells (Treg). Herein, we detail the procedures to generate and characterize RAPA-conditioned murine DCs (RAPA-DCs) ex vivo and in vivo. RAPA-DCs represent a pharmacologically conditioned DC population that promotes allograft survival and enriches for antigen-specific T-regulatory cells (Treg). DCs conditioned with immunosuppressive agents, like RAPA, represent novel and clinically applicable vectors or "negative" cellular vaccines, which can be loaded with donor antigen, and potentially used to promote/maintain organ transplant tolerance. FAU - Turnquist, Hth R AU - Turnquist HR AD - Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA. FAU - Fischer, Ryan T AU - Fischer RT FAU - Thomson, Angus W AU - Thomson AW LA - eng GR - F32AI072940/AI/NIAID NIH HHS/United States GR - R01AI41011/AI/NIAID NIH HHS/United States GR - R01AI60994/AI/NIAID NIH HHS/United States GR - T32 DK71492/DK/NIDDK NIH HHS/United States GR - T32CA082084/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PL - United States TA - Methods Mol Biol JT - Methods in molecular biology (Clifton, N.J.) JID - 9214969 RN - 0 (Immunosuppressive Agents) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Animals MH - Cells, Cultured MH - Dendritic Cells/*drug effects/immunology/*transplantation MH - Flow Cytometry MH - Immunosuppressive Agents/*pharmacology MH - Mice MH - Sirolimus/*pharmacology MH - Transplantation Tolerance/*drug effects/immunology EDAT- 2009/11/27 06:00 MHDA- 2010/02/03 06:00 CRDT- 2009/11/27 06:00 PHST- 2009/11/27 06:00 [entrez] PHST- 2009/11/27 06:00 [pubmed] PHST- 2010/02/03 06:00 [medline] AID - 10.1007/978-1-60761-421-0_8 [doi] PST - ppublish SO - Methods Mol Biol. 2010;595:135-48. doi: 10.1007/978-1-60761-421-0_8.