PMID- 28432146 OWN - NLM STAT- MEDLINE DCOM- 20170922 LR - 20180127 IS - 1550-6606 (Electronic) IS - 0022-1767 (Linking) VI - 198 IP - 11 DP - 2017 Jun 1 TI - C1q-Dependent Dendritic Cell Cross-Presentation of In Vivo-Formed Antigen-Antibody Complexes. PG - 4235-4243 LID - 10.4049/jimmunol.1602169 [doi] AB - Dendritic cells (DCs) are specialized in Ag engulfment via a wide variety of uptake receptors on their cell surface. In the present study we investigated Ag uptake and presentation of in vivo-formed Ag-Ab complexes by i.v. injecting mice with Ag-specific Abs followed by the cognate Ag. We show by this natural Ab-mediated Ag targeting system that uptake by splenic APC subsets is severely hampered in mice lacking complement factor C1q (C1qa(-/-)). Moreover, no detectable Ag cross-presentation by CD8alpha(+) DCs from C1qa(-/-) mice was found. On the contrary, Ag uptake was not hampered by APCs in FcgammaRI/II/III/IV-deficient (FcgammaR quadruple(-/-)) mice, and the cross-presentation ability of CD8alpha(+) DCs was not affected. In conclusion, we show that C1q rather than FcgammaRs controls the Ab-mediated Ag uptake and its presentation by spleen APC subsets to T cells. CI - Copyright (c) 2017 by The American Association of Immunologists, Inc. FAU - Ho, Nataschja I AU - Ho NI AD - Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2300 RC Leiden, the Netherlands. FAU - Camps, Marcel G M AU - Camps MGM AD - Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2300 RC Leiden, the Netherlands. FAU - de Haas, Edwin F E AU - de Haas EFE AD - Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2300 RC Leiden, the Netherlands. FAU - Trouw, Leendert A AU - Trouw LA AUID- ORCID: 0000-0001-5186-2290 AD - Department of Rheumatology, Leiden University Medical Center, 2300 RC Leiden, the Netherlands; and. FAU - Verbeek, J Sjef AU - Verbeek JS AD - Department of Human Genetics, Leiden University Medical Center, 2300 RC Leiden, the Netherlands. FAU - Ossendorp, Ferry AU - Ossendorp F AD - Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2300 RC Leiden, the Netherlands; f.a.ossendorp@lumc.nl. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20170421 PL - United States TA - J Immunol JT - Journal of immunology (Baltimore, Md. : 1950) JID - 2985117R RN - 0 (Antigen-Antibody Complex) RN - 0 (CD8 Antigens) RN - 0 (Receptors, IgG) RN - 80295-33-6 (Complement C1q) SB - IM MH - Adaptive Immunity MH - Animals MH - *Antigen Presentation MH - Antigen-Antibody Complex/*immunology MH - CD8 Antigens/immunology MH - Complement C1q/deficiency/genetics/*immunology MH - Cross-Priming MH - Dendritic Cells/*immunology MH - Mice MH - Mice, Inbred C57BL MH - Receptors, IgG/immunology EDAT- 2017/04/23 06:00 MHDA- 2017/09/25 06:00 CRDT- 2017/04/23 06:00 PHST- 2016/12/27 00:00 [received] PHST- 2017/03/29 00:00 [accepted] PHST- 2017/04/23 06:00 [pubmed] PHST- 2017/09/25 06:00 [medline] PHST- 2017/04/23 06:00 [entrez] AID - jimmunol.1602169 [pii] AID - 10.4049/jimmunol.1602169 [doi] PST - ppublish SO - J Immunol. 2017 Jun 1;198(11):4235-4243. doi: 10.4049/jimmunol.1602169. Epub 2017 Apr 21.