title: Splenic CD19-CD35+B220+ cells function as an inducer of follicular dendritic cell network formation.
abstract: Follicular dendritic cells (FDCs) form a reticular FDC network in the lymphoid follicle that is essential for the retention and presentation of native antigens in the form of antigen-antibody immune complexes (ICs) to B cells during secondary immune response. Although the presence of migrating precursors of FDCs has been hypothesized, their entity has not been elucidated. Here we report the identification of murine splenic CD19(-)CD11c(-)CD35(+)B220(+) cells as an inducer of FDC network formation. We demonstrated that CD19(-)-CD11c(-)CD35(+)B220(+) cells, together with stromal cells, had the remarkable ability to form lymphoid-follicle-like structures that contained B220(+)FDC-M1(+) reticular cells originally derived from CD19(-)-CD11c(-)CD35(+)B220(+) cells in the CD35(+) reticulum. Our results indicate that CD19(-)CD11c(-)CD35(+)B220(+) cells function as an inducer of FDC network formation and that the interaction between CD19(-)CD11c(-)CD35(+)B220(+) cells and stromal cells is required to initiate lymphoid follicle formation.
authors.affiliation: Laboratory for Epithelial Immunobiology, Rikagaku Kenkyusho (RIKEN) Research Center for Allergy and Immunology, Yokohama, Japan.
authors.forename: Takaya
authors.initials: T
authors.lastname: Murakami
authors.forename: Xin
authors.initials: X
authors.lastname: Chen
authors.forename: Koji
authors.initials: K
authors.lastname: Hase
authors.forename: Ayako
authors.initials: A
authors.lastname: Sakamoto
authors.forename: Chie
authors.initials: C
authors.lastname: Nishigaki
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ohno
mesh_terms: D000818:Animals; D018941:Antigens, CD19 / Q000378:metabolism*; D002454:Cell Differentiation; D019070:Cell Lineage; D020566:Dendritic Cells, Follicular / Q000166:cytology* / Q000378:metabolism; D005434:Flow Cytometry; D049452:Green Fluorescent Proteins / Q000235:genetics / Q000378:metabolism; D016130:Immunophenotyping; D007694:Killer Cells, Natural / Q000145:classification / Q000276:immunology; D017493:Leukocyte Common Antigens / Q000378:metabolism*; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008822:Mice, Transgenic; D017463:Receptors, Complement 3b / Q000378:metabolism*; D013154:Spleen / Q000166:cytology*; D017154:Stromal Cells / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics / Q000502:physiology
chemical_list: D018941:Antigens, CD19; D017463:Receptors, Complement 3b; D014409:Tumor Necrosis Factor-alpha; C485184:enhanced green fluorescent protein; D049452:Green Fluorescent Proteins; D017493:Leukocyte Common Antigens