PMID- 11859111 OWN - NLM STAT- MEDLINE DCOM- 20020315 LR - 20201215 IS - 0022-1767 (Print) IS - 0022-1767 (Linking) VI - 168 IP - 5 DP - 2002 Mar 1 TI - Antigen-antibody immune complexes empower dendritic cells to efficiently prime specific CD8+ CTL responses in vivo. PG - 2240-6 AB - Dendritic cells (DCs) require a maturation signal to acquire efficient CTL-priming capacity. In vitro FcgammaR-mediated internalization of Ag-Ab immune complexes (ICs) can induce maturation of DCs. In this study, we show that IC-induced DC maturation in vitro enables DCs to prime peptide-specific CD8+ CTLs in vivo, independently of CD4+ Th cells. Importantly, OVA/anti-OVA IC-treated DCs not only primed CD8+ CTLs to an exogenously loaded peptide nonrelated to OVA, but also efficiently primed CTLs against the dominant CTL epitope derived from the OVA Ag present in the ICs. Our studies show that ICs fulfill a dual role in priming of CD8+ CTL responses to exogenous Ags: enhancement of Ag uptake by DCs and activation of DCs, resulting in "license to kill." These findings indicate that the presence of specific Abs can crucially affect the induction of cytotoxic cellular responses. FAU - Schuurhuis, Danita H AU - Schuurhuis DH AD - Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Albinusdreef 2, 2300 RC Leiden, The Netherlands. FAU - Ioan-Facsinay, Andreea AU - Ioan-Facsinay A FAU - Nagelkerken, Bas AU - Nagelkerken B FAU - van Schip, Jolien J AU - van Schip JJ FAU - Sedlik, Christine AU - Sedlik C FAU - Melief, Cornelis J M AU - Melief CJ FAU - Verbeek, J Sjef AU - Verbeek JS FAU - Ossendorp, Ferry AU - Ossendorp F 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 (Antigen-Antibody Complex) RN - 0 (Histocompatibility Antigens Class I) RN - 0 (Peptides) RN - 9006-59-1 (Ovalbumin) SB - IM MH - Animals MH - *Antigen Presentation MH - Antigen-Antibody Complex/*immunology MH - Cell Differentiation MH - Cell Line, Transformed MH - Cytotoxicity Tests, Immunologic MH - Dendritic Cells/*immunology MH - Endocytosis MH - Female MH - Histocompatibility Antigens Class I/physiology MH - Hybridomas MH - Mice MH - Mice, Inbred C57BL MH - Microscopy, Confocal MH - Ovalbumin/immunology/metabolism MH - Peptides/immunology MH - T-Lymphocytes, Cytotoxic/*immunology EDAT- 2002/02/23 10:00 MHDA- 2002/03/16 10:01 CRDT- 2002/02/23 10:00 PHST- 2002/02/23 10:00 [pubmed] PHST- 2002/03/16 10:01 [medline] PHST- 2002/02/23 10:00 [entrez] AID - 10.4049/jimmunol.168.5.2240 [doi] PST - ppublish SO - J Immunol. 2002 Mar 1;168(5):2240-6. doi: 10.4049/jimmunol.168.5.2240.