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Human plasmacytoid dendritic cells display and shed B cell maturation antigen upon TLR engagement.
J. Immunol. 198, 3081-3088 (2017)
The BAFF-APRIL system is best known for its control of B cell homeostasis, and it is a target of therapeutic intervention in autoimmune diseases and lymphoma. By analyzing the expression of the three receptors of this system, B cell maturation Ag (BCMA), transmembrane activator and CAML interactor, and BAFF receptor, in sorted human immune cell subsets, we found that BCMA was transcribed in plasmacytoid dendritic cells (pDCs) in both blood and lymphoid tissue. Circulating human pDCs contained BCMA protein without displaying it on the cell surface. After engagement of TLR7/8 or TLR9, BCMA was detected also on the cell surface of pDCs. The display of BCMA on the surface of human pDCs was accompanied by release of soluble BCMA (sBCMA); inhibition of γ-secretase enhanced surface expression of BCMA and reduced the release of sBCMA by pDCs. In contrast with human pDCs, murine pDCs did not express BCMA, not even after TLR9 activation. In this study, we extend the spectrum of BCMA expression to human pDCs. sBCMA derived from pDCs might determine local availability of its high-affinity ligand APRIL, because sBCMA has been shown to function as an APRIL-specific decoy. Further, therapeutic trials targeting BCMA in patients with multiple myeloma should consider possible effects on pDCs.
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Publication type
Article: Journal article
Document type
Scientific Article
Language
Publication Year
2017
HGF-reported in Year
2017
ISSN (print) / ISBN
0022-1767
e-ISSN
1550-6606
Journal
Journal of Immunology
Quellenangaben
Volume: 198,
Issue: 8,
Pages: 3081-3088
Publisher
American Association of Immunologists
Reviewing status
Peer reviewed
Institute(s)
CF Monoclonal Antibodies (CF-MAB)
POF-Topic(s)
30504 - Mechanisms of Genetic and Environmental Influences on Health and Disease
Research field(s)
Immune Response and Infection
PSP Element(s)
G-501760-001
WOS ID
WOS:000401127500009
Scopus ID
85017373084
PubMed ID
28283566
Erfassungsdatum
2017-06-08