High Rate of Antibody Secretion Is not Integral to Plasma Cell Differentiation as Revealed by XBP-1 Deficiency
- Author(s)
- Taubenheim, N; Tarlinton, DM; Crawford, S; Corcoran, LM; Hodgkin, PD; Nutt, SL;
- Details
- Publication Year 2012-10-01,Volume 189,Issue #7,Page 3328-3338
- Journal Title
- JOURNAL OF IMMUNOLOGY
- Publication Type
- Journal Article
- Abstract
- During B cell terminal differentiation, a complex set of transcription factors interact to drive the phenotypic and functional changes leading to the development of Ab-secreting cells (ASCs). The transcription factor X-box binding protein 1 (XBP-1) is an essential part of one of the branches of the unfolded protein response (UPR). The UPR is induced when a cell has to handle large amounts of proteins, as is the case in ASCs. Although XBP-1 was initially also ascribed an indispensable function in plasma cell development, later studies of B cell-specific deletion reported a much milder consequence of XBP-1 deficiency. Our interest was to determine whether XBP-1 was integral for the differentiation of plasma cells. Using both in vitro and in vivo assays, we found efficient generation of ASCs in the absence of XBP-1. ASCs were present at normal frequencies in resting and immunized mice and displayed a pattern of surface markers typical for plasma cells. The absence of XBP-1 resulted in a reduction but not ablation of Ab secretion and the failure to develop the cellular morphology characteristic of ASCs. Thus, XBP-1 deficiency demonstrates that the gene regulatory program controlling plasma cell differentiation can proceed relatively normally in the absence of high rates of Ig secretion. The Journal of Immunology, 2012, 189: 3328-3338.
- Publisher
- AMER ASSOC IMMUNOLOGISTS
- Keywords
- UNFOLDED PROTEIN RESPONSE; TRANSCRIPTION FACTOR XBP-1; B-CELLS; GENE-EXPRESSION; MESSENGER-RNA; BLIMP-1; ACTIVATION; CD43; STRESS; PROLIFERATION
- Research Division(s)
- Immunology; Molecular Immunology
- Publisher's Version
- https://doi.org/10.4049/jimmunol.1201042
- Terms of Use/Rights Notice
- Copyright © 2012 by The American Association of Immunologists, Inc.
Creation Date: 2012-10-01 12:00:00