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Immunologic Research
Published in: Immunologic Research 1-3/2012

01-09-2012 | Singapore Immunology Network

TLR7 and TLR9 in SLE: when sensing self goes wrong

Authors: T. Celhar, R. Magalhães, A.-M. Fairhurst

Published in: Immunologic Research | Issue 1-3/2012

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Abstract

Autoreactive B and T cells are present in healthy, autoimmunity-free individuals, but they are kept in check by various regulatory mechanisms. In systemic lupus erythematosus (SLE) patients, however, autoreactive cells are expanded, activated, and produce large quantities of autoantibodies, directed especially against nuclear antigens. These antibodies form immune complexes with self-nucleic acids present in SLE serum. Since self-DNA and self-RNA in the form of protein complexes can act as TLR9 and TLR7 ligands, respectively, TLR stimulation is suggested as an additional signal contributing to activation and/or modulation of the aberrant adaptive immune response. Data from mouse models suggest a pathogenic role for TLR7 and a protective role for TLR9 in the pathogenesis of SLE. Future investigations are needed to elucidate the underlying modulatory mechanisms and the role of TLR7 and TLR9 in the complex pathogenesis of human SLE.
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Metadata
Title
TLR7 and TLR9 in SLE: when sensing self goes wrong
Authors
T. Celhar
R. Magalhães
A.-M. Fairhurst
Publication date
01-09-2012
Publisher
Springer-Verlag
Published in
Immunologic Research / Issue 1-3/2012
Print ISSN: 0257-277X
Electronic ISSN: 1559-0755
DOI
https://doi.org/10.1007/s12026-012-8270-1

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