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Open Access Green as soon as Postprint is submitted to ZB.
LMP1 signaling can replace CD40 signaling in B cells in vivo and has unique features of inducing class-switch recombination to IgG1.
Blood 111, 1448-1455 (2008)
The Epstein-Barr virus (EBV) protein LMP1 is considered to be a functional homologue of the CD40 receptor. However, in contrast to the latter, LMP1 is a constitutively active signaling molecule. To compare B cell-specific LMP1 and CD40 signaling in an unambiguous manner, we generated transgenic mice conditionally expressing a CD40/LMP1 fusion protein, which retained the LMP1 cytoplasmic tail but has lost the constitutive activity of LMP1 and needs to be activated by the CD40 ligand. We show that LMP1 signaling can completely substitute CD40 signaling in B cells, leading to normal B-cell development, activation, and immune responses including class-switch recombination, germinal center formation, and somatic hypermutation. In addition, the LMP1-signaling domain has a unique property in that it can induce class-switch recombination to IgG1 independent of cytokines. Thus, our data indicate that LMP1 has evolved to imitate T-helper cell function allowing activation, proliferation, and differentiation of EBV-infected B cells independent of T cells.
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Publication type
Article: Journal article
Document type
Scientific Article
Language
english
Publication Year
2008
HGF-reported in Year
0
ISSN (print) / ISBN
0006-4971
e-ISSN
1528-0020
Journal
Blood
Quellenangaben
Volume: 111,
Issue: 3,
Pages: 1448-1455
Publisher
American Society of Hematology
Reviewing status
Peer reviewed
Institute(s)
Research Unit Gene Vector (AGV)
Institute of Stem Cell Research (ISF)
Research Unit Stem Cell Dynamics (SCD)
Institute of Stem Cell Research (ISF)
Research Unit Stem Cell Dynamics (SCD)
POF-Topic(s)
30203 - Molecular Targets and Therapies
Research field(s)
Immune Response and Infection
PSP Element(s)
G-501500-003
G-550900-001
G-550900-001
Erfassungsdatum
2008-06-04