title: CD11c+ dendritic cells are required for survival in murine polymicrobial sepsis.
abstract: CD11c+ dendritic cells (DCs) are APCs that link innate and adaptive immunity. Although DCs are lost from spleen and lymph nodes in sepsis, their role in outcome remains unclear. Transgenic mice (B6.FVB-Tg(.Itgax-DTR/EGFP.57)Lan/J) expressing the diphtheria toxin (DT) receptor on the CD11c promoter (DCKO mice) received 4 ng/kg DT, which resulted in depletion of 88-95% of mature myeloid and lymphoid DCs, with less depletion (75%) of plasmacytoid DCs. Pretreatment of DCKO mice with DT resulted in reduced survival in sepsis compared with saline-pretreated DCKO mice (0 vs 54%; p < 0.05) or DT-treated wild-type littermates (0 vs 54%; p < 0.05). This increased mortality was not associated with either increased bacteremia or plasma cytokine concentrations. Intravenous injection of 10(7) wild-type DCs improved survival in DCKO mice (42 vs 0%; p = 0.05). These data confirm that DCs are essential in the septic response and suggest that strategies to maintain DC numbers or function may improve outcome.
authors.affiliation: Department of Surgery, University of Florida, Gainesville 32610-0221, USA.
authors.forename: Philip O
authors.initials: PO
authors.lastname: Scumpia
authors.forename: Priscilla F
authors.initials: PF
authors.lastname: McAuliffe
authors.forename: Kerri A
authors.initials: KA
authors.lastname: O'Malley
authors.forename: Ricardo
authors.initials: R
authors.lastname: Ungaro
authors.forename: Takefumi
authors.initials: T
authors.lastname: Uchida
authors.forename: Tadashi
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Daniel G
authors.initials: DG
authors.lastname: Remick
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Clare-Salzler
authors.forename: Lyle L
authors.initials: LL
authors.lastname: Moldawer
authors.forename: Philip A
authors.initials: PA
authors.lastname: Efron
mesh_terms: D000818:Animals; D039521:CD11c Antigen / Q000502:physiology*; D016207:Cytokines / Q000096:biosynthesis; D003713:Dendritic Cells / Q000502:physiology*; D004167:Diphtheria Toxin / Q000494:pharmacology; D000949:Histocompatibility Antigens Class II / Q000032:analysis; D051379:Mice; D018345:Mice, Knockout; D018805:Sepsis / Q000276:immunology* / Q000401:mortality
chemical_list: D039521:CD11c Antigen; D016207:Cytokines; D004167:Diphtheria Toxin; D000949:Histocompatibility Antigens Class II