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Chu, Y.* ; Soberon, V.* ; Glockner, L. ; Beyaert, R.* ; Massoumi, R.* ; van Loo, G.* ; Krappmann, D. ; Schmidt-Supprian, M.*

A20 and CYLD do not share significant overlapping functions during B cell development and activation.

J. Immunol. 189, 4437-4443 (2012)
DOI PMC
The ubiquitin-editing enzyme A20 (TNFAIP3) and the deubiquitinase CYLD are central negative regulators of NF-κB signaling. Both can act by removing nonproteolytic K63-linked polyubiquitin chains from an overlapping set of signaling molecules. In B cells, A20 deficiency results in hyperactivity, loss of immune homeostasis, inflammation, and autoimmunity. The reported consequences of CYLD deficiency are controversial, ranging from an absence of effects to dramatic B cell hyperplasia. These differences could be due to varying compensation for the loss of CYLD function by A20. Therefore, to explore potential overlapping physiological functions between A20 and CYLD, we generated and characterized A20/CYLD double-deficient B cells. Interestingly, the lack of both A20 and CYLD did not exacerbate the developmental defects and hyperresponsive activity of A20-deficient B cells. In addition, the extent of B cell activation after in vitro stimulation with anti-CD40, LPS, and CpG was comparable in B cells lacking A20/CYLD and A20 alone. However, in response to BCR cross-linking, we observed small but reproducible additive effects of the lack of A20 and CYLD. Taken together, our results demonstrate that A20 and CYLD do not share significant functions during B cell development and activation.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
ISSN (print) / ISBN 0022-1767
e-ISSN 1550-6606
Zeitschrift Journal of Immunology
Quellenangaben Band: 189, Heft: 9, Seiten: 4437-4443 Artikelnummer: , Supplement: ,
Verlag American Association of Immunologists
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed
Institut(e) Research Unit Signaling and Translation (SAT)
Institute of Molecular Toxicology and Pharmacology (TOX)