PMID- 10499923 OWN - NLM STAT- MEDLINE DCOM- 19991019 LR - 20211203 IS - 0022-1007 (Print) IS - 1540-9538 (Electronic) IS - 0022-1007 (Linking) VI - 190 IP - 6 DP - 1999 Sep 20 TI - A member of the dendritic cell family that enters B cell follicles and stimulates primary antibody responses identified by a mannose receptor fusion protein. PG - 851-60 AB - Dendritic cells (DCs) are known to activate naive T cells to become effective helper cells. In addition, recent evidence suggests that DCs may influence naive B cells during the initial priming of antibody responses. In this study, using three-color confocal microscopy and three-dimensional immunohistograms, we have observed that in the first few days after a primary immunization, cells with dendritic morphology progressively localize within primary B cell follicles. These cells were identified by their ability to bind a fusion protein consisting of the terminal cysteine-rich portion of the mouse mannose receptor and the Fc portion of human immunoglobulin (Ig)G1 (CR-Fc). In situ, these CR-Fc binding cells express major histocompatibility complex class II, sialoadhesin, and CD11c and are negative for other markers identifying the myeloid DC lineage, such as (CD11b), macrophages (F4/80), follicular DCs (FDC-M2), B cells (B220), and T cells (CD4). Using CR-Fc binding capacity and flow cytometry, the cells were purified from the draining lymph nodes of mice 24 h after immunization. When injected into naive mice, these cells were able to prime T cells as well as induce production of antigen-specific IgM and IgG1. Furthermore, they produced significantly more of the lymphocyte chemoattractant, macrophage inflammatory protein (MIP)-1alpha, than isolated interdigitating cells. Taken together, these results provide evidence that a subset of DCs enters primary follicles, armed with the capacity to attract and provide antigenic stimulation for T and B lymphocytes. FAU - Berney, C AU - Berney C AD - Serono Pharmaceutical Research Institute, CH-1228 Geneva, Switzerland. FAU - Herren, S AU - Herren S FAU - Power, C A AU - Power CA FAU - Gordon, S AU - Gordon S FAU - Martinez-Pomares, L AU - Martinez-Pomares L FAU - Kosco-Vilbois, M H AU - Kosco-Vilbois MH LA - eng PT - Journal Article PL - United States TA - J Exp Med JT - The Journal of experimental medicine JID - 2985109R RN - 0 (Antigens, CD) RN - 0 (Immunoglobulin G) RN - 0 (Lectins, C-Type) RN - 0 (Mannose Receptor) RN - 0 (Mannose-Binding Lectins) RN - 0 (Receptors, Cell Surface) RN - 0 (Receptors, Fc) RN - 0 (Recombinant Fusion Proteins) SB - IM MH - Animals MH - *Antigen Presentation MH - Antigens, CD/immunology MH - B-Lymphocytes/*immunology MH - Dendritic Cells/*immunology MH - Female MH - Humans MH - *Immunity MH - Immunoglobulin G/immunology MH - *Lectins, C-Type MH - Lymphocyte Cooperation MH - Mannose Receptor MH - *Mannose-Binding Lectins MH - Mice MH - Mice, Inbred BALB C MH - Receptors, Cell Surface/genetics/*immunology MH - Receptors, Fc/genetics/*immunology MH - Recombinant Fusion Proteins/genetics/immunology MH - T-Lymphocytes/*immunology PMC - PMC2195630 EDAT- 1999/09/28 00:00 MHDA- 1999/09/28 00:01 PMCR- 2000/03/20 CRDT- 1999/09/28 00:00 PHST- 1999/09/28 00:00 [pubmed] PHST- 1999/09/28 00:01 [medline] PHST- 1999/09/28 00:00 [entrez] PHST- 2000/03/20 00:00 [pmc-release] AID - 99-0356 [pii] AID - 10.1084/jem.190.6.851 [doi] PST - ppublish SO - J Exp Med. 1999 Sep 20;190(6):851-60. doi: 10.1084/jem.190.6.851.