BLyS receptor signatures resolve homeostatically independent compartments among naïve and antigen-experienced B cells
- PMID: 16919470
- DOI: 10.1016/j.smim.2006.07.001
BLyS receptor signatures resolve homeostatically independent compartments among naïve and antigen-experienced B cells
Abstract
The BLyS family of receptors includes two cytokines, BLyS and APRIL; and three receptors, BR3, BCMA and TACI. Together, these regulate the size and composition of peripheral B cell pools. The multiplicity of ligand-receptor sets, in conjunction with differential receptor expression, alternative binding partners and disparate downstream signaling characteristics, affords the potential to establish independently regulated homeostatic niches among primary and antigen-experienced B cell subsets. Thus, BLyS signaling via BR3 is the dominant homeostatic regulator of primary B cell pools, whereas APRIL interactions with BCMA likely govern memory B cell populations. Short-lived antibody forming cell populations and their proliferating progenitors express a TACI-predominant signature. Further, within each niche, relative fitness to compete for available cytokine is determined by exogenous inputs via adaptive and innate receptor systems, affording intramural hierarchies that determine clonotype composition.
Comment in
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Travelling with the BAFF/BLyS family: are we there yet?Semin Immunol. 2006 Oct;18(5):261-2. doi: 10.1016/j.smim.2006.07.003. Epub 2006 Aug 14. Semin Immunol. 2006. PMID: 16905331 No abstract available.
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