B Cell Responses Antiviral Niches by B and Th Cells Augments CXCR5
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CXCR5-Dependent Seeding of Follicular Niches by B and Th Cells Augments Antiviral B Cell Responses This information is current as Tobias Junt, Katja Fink, Reinhold Förster, Beatrice Senn, of October 2, 2021. Martin Lipp, Masamichi Muramatsu, Rolf M. Zinkernagel, Burkhard Ludewig and Hans Hengartner J Immunol 2005; 175:7109-7116; ; doi: 10.4049/jimmunol.175.11.7109 http://www.jimmunol.org/content/175/11/7109 Downloaded from References This article cites 32 articles, 19 of which you can access for free at: http://www.jimmunol.org/content/175/11/7109.full#ref-list-1 http://www.jimmunol.org/ Why The JI? Submit online. • Rapid Reviews! 30 days* from submission to initial decision • No Triage! Every submission reviewed by practicing scientists • Fast Publication! 4 weeks from acceptance to publication by guest on October 2, 2021 *average Subscription Information about subscribing to The Journal of Immunology is online at: http://jimmunol.org/subscription Permissions Submit copyright permission requests at: http://www.aai.org/About/Publications/JI/copyright.html Email Alerts Receive free email-alerts when new articles cite this article. Sign up at: http://jimmunol.org/alerts The Journal of Immunology is published twice each month by The American Association of Immunologists, Inc., 1451 Rockville Pike, Suite 650, Rockville, MD 20852 Copyright © 2005 by The American Association of Immunologists All rights reserved. Print ISSN: 0022-1767 Online ISSN: 1550-6606. The Journal of Immunology CXCR5-Dependent Seeding of Follicular Niches by B and Th Cells Augments Antiviral B Cell Responses1 Tobias Junt,2* Katja Fink,2* Reinhold Fo¨rster,† Beatrice Senn,3* Martin Lipp,¶ Masamichi Muramatsu,‡ Rolf M. Zinkernagel,* Burkhard Ludewig,2,4§ and Hans Hengartner2* The chemokine receptor CXCR5 and its ligand CXCL13 define the structure of B cell follicles within secondary lymphoid organs. Here, we examined the impact of CXCR5 on antiviral B cell responses in vivo. CXCR5؊/؊ mice showed a normal production of IgM and IgG acutely after infection with vesicular stomatitis virus (VSV) and developed VSV-specific germinal centers. However, impaired Ig class switch and Ab production were observed under conditions of limited availability of Ag (i.e., after immunization with nonreplicating viral particles or soluble Ag). Adoptive transfer of CXCR5-deficient, VSV-specific B and Th cells demon- strated that CXCR5 expression on both B and Th cells is required for an efficient Ig class switch. These experiments revealed that CXCR5 is critical for the coordinated interaction of antiviral T and B cells through its impact on initial B cell expansion and the Downloaded from recruitment of Ag-specific B and Th cells to germinal centers. The Journal of Immunology, 2005, 175: 7109–7116. coordinated interaction of CD4ϩ Th and B cells is cru- We investigated this discrepancy in well characterized viral sys- cial for efficient Ig production (1). The collaboration of tems, by infecting CXCR5Ϫ/Ϫ mice with the cytopathic vesicular Ag-specific Th and B cells in secondary lymphoid or- stomatitis virus (VSV),5 or with the non-cytopathic lymphocytic A Ϫ/Ϫ gans depends on distinct chemokine-chemokine receptor interac- choriomeningitis virus (LCMV), or by immunizing CXCR5 tions, such as CXCR5 and its ligand chemokine CXCL13 (2). mice with nonreplicating VSV-derived Ags (12). The production http://www.jimmunol.org/ CXCL13 is expressed in B cell follicles (3), and CXCR5 is ex- of neutralizing Abs in the acute phase of VSV infection that are pressed by naive B cells and a subpopulation of activated CD4ϩ known to be of high affinity was not impaired in CXCR5Ϫ/Ϫ mice. helper T cells (4). After initial activation in the marginal zone of However, antiviral B cell responses were significantly reduced in the spleen, B cells relocate to the B cell zone through down-reg- CXCR5Ϫ/Ϫ mice under conditions of low antigenic doses. These ulation of S1P1 (5) and then to the border of T and B cell zones impaired B cell responses were caused by the combined effect of through up-regulation of CCR7 (6). After differentiation to plasma CXCR5 deficiency on both Th and B cells. Our results from adop- cells, B cells lose CCR7 and CXCR5 expression and thus leave tive transfer experiments with CXCR5-deficient, VSV-specific Th secondary lymphoid organs (7). CD4ϩ T cells up-regulate CXCR5 and B cells indicate that CXCR5 increases the efficacy of T-de- by guest on October 2, 2021 during activation and localize near B cell follicles (8). These pendent (TD) B cell responses by 1) fostering an efficient Ag- CD4ϩCXCR5ϩ Th cells were shown to enhance the production of specific expansion of B cells in secondary lymphoid organs before IgG and IgA and, to a lesser extent, of IgM in vitro (9, 10) and the Ig class switch and 2) attracting Ag-specific B and Th cells to were thus termed “follicular helper T cells.” Contradictory findings germinal centers (GCs) in the later phase of the immune response. in CXCR5-deficient mice, however, suggested that T-B collabo- ration is not affected by the lack of this chemokine receptor: Materials and Methods Ϫ Ϫ CXCR5 / mice produce normal levels of switched Ig isotypes in Mice vivo after immunization with DNP-keyhole limpet hemocyanin in Ϫ/Ϫ All mice were bred at the Institut fu¨r Labortierkunde (University of Zu¨rich, adiuvant (4), and B cells of CXCR5 mice underwent normal Zu¨rich, Switzerland). B6PLThy1.1 and B6.Cg-IgHaThy1aGpi1a/J (IgH- affinity maturation when 2-phenyl-oxazolone was used as an aThy1.1) mice were obtained originally from The Jackson Laboratory. Ag (11). CXCR5Ϫ/Ϫ mice, nine times backcrossed to 129Sv, were PCR typed as described previously (4). Mice bearing a knock-in construct for the VSV- neutralizing Ab VI10 in their Ig locus (VI10) (13) and TCR-transgenic *Institute of Experimental Immunology, Zu¨rich, Switzerland; †Hannover Medical mice for the T cell-epitope p8 of VSV (L7) (14) have been described Ϫ Ϫ School, Institute of Immunology, Hannover, Germany; ‡Department of Medical previously. Activation-induced deaminase knockout mice (AID / ) (15) Chemistry, Graduate School of Medicine, Kyoto University, Kyoto, Japan; §Research were a gift from S. Fagarasan (Kyoto University, Kyoto, Japan). For adop- Department, Kantonal Hospital St. Gallen, St. Gallen, Switzerland; and ¶Max-Del- tive transfer experiments, VI10 and L7 mice were crossed to CXCR5Ϫ/Ϫ bru¨ck-Center for Molecular Medicine, Berlin, Germany mice that were backcrossed onto the C57BL/6 background for 11 Received for publication March 21, 2005. Accepted for publication September generations. 5, 2005. The costs of publication of this article were defrayed in part by the payment of page Viruses and immunizations charges. This article must therefore be hereby marked advertisement in accordance The LCMV, WE strain, was obtained originally from Dr. F. Lehmann- with 18 U.S.C. Section 1734 solely to indicate this fact. Grube (Heinrich-Pette-Institut, Hamburg, Germany) and propagated as de- 1 This work was supported by the Swiss National Science Foundation and the Kanton scribed previously (16). The VSV, Indiana strain (VSV-IND; of Zu¨rich. Mudd-Summers isolate), was obtained originally from Prof. D. Kolakofsky 2 B.L., H.H., T.J. and K.F. contributed equally to this work. 3 Current address: Intercell AG, Campus Vienna Biocenter 6, A-1030 Vienna, 5 Abbreviations used in this paper: VSV, vesicular stomatitis virus; AID, activation- Austria. induced deaminase; GC, germinal center; LCMV, lymphocytic choriomeningitis vi- 4 Address correspondence and reprint requests to Dr. Burkhard Ludewig, Research rus; VSV-IND, vesicular stomatitis virus, Indiana strain; VSV-G, vesicular stomatitis Department, Kantonsspital St. Gallen, CH-9007 St. Gallen, Switzerland. E-mail ad- virus-glycoprotein; TRITC, tetramethylrhodamine isothiocyanate; PB, permeabiliza- dress: [email protected] tion buffer; TD, T-dependent; TI, T-independent; DC, dendritic cell. Copyright © 2005 by The American Association of Immunologists, Inc. 0022-1767/05/$02.00 7110 CXCR5 IN ANTIVIRAL B CELL RESPONSES (University of Geneva, Geneva, Switzerland). For some experiments, in- washing in PBS, nuclei were counterstained with 4Ј,6Ј-diamino-2-phe- activated VSV-IND was obtained using UV irradiation (7UV 15W; Phil- nylindoledihydrochloride (Sigma-Aldrich), and sections were mounted ips). Recombinant VSV-glycoprotein (VSV-G) was obtained from a cul- with fluorescence mounting solution (DakoCytomation). For histological ture of Spodoptera frugiperda 9 cells after infection with a recombinant detection of CXCL13, acetone-fixed spleen sections were incubated with baculovirus (17). 15 g/ml goat anti-mouse CXCL13, followed by 5 g/ml donkey anti-goat biotin and streptavidin-TRITC. Fluorescence was analyzed under an Olym- Abs and flow cytometry pus UplanApo objective (10ϫ/0.4) with a BX61 fluorescence microscope Abs for flow cytometry and fluorescence microscopy were purchased from (Olympus) and an F-view camera (Soft Imaging System). Single fluores- BD Pharmingen, unless stated otherwise. Streptavidin-tetramethylrhodam- cence channels were acquired with the following Olympus filter sets: Spec- trum orange for TRITC, Spectrum green for FITC, Cy5 for allophycocya- ine isothiocyanate (TRITC) was purchased from Southern Biotechnology Ј Ј Associates. Goat anti-mouse CXCL13 was obtained from R&D Systems, nin, and 4 ,6 -diamino-2-phenylindoledihydrochloride. Color channels and donkey anti-goat IgG was obtained from Jackson ImmunoResearch were assembled automatically with the analySIS software (Soft Imaging Laboratories. The Ab 35.61 specific for a combination of heavy and light System), and images were processed using Adobe Photoshop, without non- chains of the VI10 Ab was produced as described previously (13). Aliquots linear operations, unless stated otherwise. of 5 ϫ 105 cells or three drops of blood were stained in FACS buffer (PBS, 2% FCS, 20 mM EDTA, and 0.03% NaN3) at 4°C for 20 min. Before Results analysis of peripheral blood, erythrocytes were lysed with FACS Lysing Antiviral B cell responses in CXCR5-deficient mice Solution (BD Pharmingen).