PMID- 12941141 OWN - NLM STAT- MEDLINE DCOM- 20031024 LR - 20190513 IS - 0019-2805 (Print) IS - 1365-2567 (Electronic) IS - 0019-2805 (Linking) VI - 110 IP - 1 DP - 2003 Sep TI - Unimpaired dendritic cell functions in MVP/LRP knockout mice. PG - 58-65 AB - Dendritic cells (DCs) act as mobile sentinels of the immune system. By stimulating T lymphocytes, DCs are pivotal for the initiation of both T- and B-cell-mediated immune responses. Recently, ribonucleoprotein particles (vaults) were found to be involved in the development and/or function of human DCs. To further investigate the role of vaults in DCs, we examined the effects of disruption of the major vault protein (MVP/LRP) on the development and antigen-presenting capacity of DCs, using our MVP/LRP knockout mouse model. Mononuclear bone marrow cells were isolated from wild-type and knockout mice and stimulated to differentiate to DCs. Like human DCs, the wild-type murine DC cultures strongly expressed MVP/LRP. Nevertheless, the MVP/LRP-deficient DCs developed normally and showed similar expression levels of several DC surface markers. No differences were observed in in vitro studies on the antigen uptake and presenting capacities of the wild-type and MVP/LRP knockout DCs. Moreover, immunization of the MVP/LRP-deficient mice with several T-cell antigens led to responses similar to those observed in the wild-type mice, indicating that the in vivo DC migration and antigen-presentation capacities are intact. Moreover, no differences were observed in the induction of the T cell-dependent humoral responses and orally induced peripheral T-cell tolerance. In conclusion, vaults are not required for primary DC functions. Their abundance in DCs may, however, still reflect basic roles in myeloid cell proliferation and DC development. FAU - Mossink, Marieke H AU - Mossink MH AD - Department of Hematology, Erasmus Medical Center, Rotterdam, the Netherlands. FAU - de Groot, Jan AU - de Groot J FAU - van Zon, Arend AU - van Zon A FAU - Franzel-Luiten, Erna AU - Franzel-Luiten E FAU - Schoester, Martijn AU - Schoester M FAU - Scheffer, George L AU - Scheffer GL FAU - Sonneveld, Pieter AU - Sonneveld P FAU - Scheper, Rik J AU - Scheper RJ FAU - Wiemer, Erik A C AU - Wiemer EA LA - eng PT - Journal Article PL - England TA - Immunology JT - Immunology JID - 0374672 RN - 0 (Immunoglobulin G) RN - 0 (Vault Ribonucleoprotein Particles) RN - 0 (major vault protein) SB - IM MH - Administration, Oral MH - Animals MH - Antigen Presentation/immunology MH - Cell Differentiation/immunology MH - Cells, Cultured MH - Dendritic Cells/*immunology MH - Hypersensitivity, Delayed/immunology MH - Immune Tolerance MH - Immunoglobulin G/biosynthesis MH - Immunophenotyping MH - Lymphocyte Culture Test, Mixed MH - Macrophages, Peritoneal/immunology MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - T-Lymphocytes/immunology MH - Vault Ribonucleoprotein Particles/genetics/*immunology/metabolism PMC - PMC1783015 EDAT- 2003/08/28 05:00 MHDA- 2003/10/25 05:00 PMCR- 2004/09/01 CRDT- 2003/08/28 05:00 PHST- 2003/08/28 05:00 [pubmed] PHST- 2003/10/25 05:00 [medline] PHST- 2003/08/28 05:00 [entrez] PHST- 2004/09/01 00:00 [pmc-release] AID - 1708 [pii] AID - 10.1046/j.1365-2567.2003.01708.x [doi] PST - ppublish SO - Immunology. 2003 Sep;110(1):58-65. doi: 10.1046/j.1365-2567.2003.01708.x.