Cited by 114Systemic Lupus Erythematosus ResearchImmune Response and InflammationT-cell and B-cell Immunology

Regulation of autoreactive B cell responses to endogenous TLR ligands

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Avalos, Ana Maria, Busconi, Liliana, Marshak-Rothstein, Ann·2010·Autoimmunity

Abstract

Immune complexes containing DNA and RNA are responsible for disease manifestations found in patients with systemic lupus erythematosus (SLE). B cells contribute to SLE pathology through BCR recognition of endogenous DNA- and RNA- associated autoantigens and delivery of these self-constituents to endosomal TLR9 and TLR7, respectively. B cell activation by these pathways leads to production of class-switched DNA- and RNA-reactive autoantibodies, contributing to an inflammatory amplification loop characteristic of disease. Intriguingly, self-DNA and RNA are typically non-stimulatory for TLR9/7 due to the absence of stimulatory sequences or the presence of molecular modifications. Recent evidence from our laboratory and others suggests that B cell activation by BCR/TLR pathways is tightly regulated by surface-expressed receptors on B cells, and the outcome of activation depends on the balance of stimulatory and inhibitory signals. Either IFNalpha engagement of the type I IFN receptor or loss of IgG ligation of the inhibitory FcgammaRIIB receptor promotes B cell activation by weakly stimulatory DNA and RNA TLR ligands. In this context, autoreactive B cells can respond robustly to common autoantigens. These findings have important implications for the role of B cells in vivo in the pathology of SLE.

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  1. [28]Lau CM Broughton C Tabor AS Akira S Flavell RA Mamula MJ Christensen SR Shlomchik MJ Viglianti GA Rifkin IR RNA-associated autoantigens activate B cells by combined B cell antigen receptor/Toll-like receptor 7 engagement J Exp Med 2005 202 1171 7 16260486 PMC2213226

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Authors
Avalos, A. M., Busconi, L., & Marshak-Rothstein, A.
Affiliations
Boston University (US)
Venue
Autoimmunity
Published
2009-12-17
Volume
43
Issue
1
Pages
76-83
ISSN
  • 0891-6934 (ISSN-L)
  • 1607-842X
OpenAlex
W2135884655
Cited by
114
References
64
Citations by year
2026: 3 · 2024: 2 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 3 · 2019: 6 · 2018: 4 · 2017: 8 · 2016: 7 · 2015: 14 · 2014: 10 · 2013: 7 · 2012: 18
FWCI
2.15
Type
journal article
Language
en
Open access
Locations
  • Autoimmunity (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR035230, P01AR050256)
Topics
  • Health Sciences › Medicine › Rheumatology › Systemic Lupus Erythematosus Research
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
Keywords
systemic lupus erythematosus, autoreactive B cells, B cell activation, TLR9, TLR7, self-DNA, immune complexes, B cell receptor signaling, type I interferon receptor, interferon-alpha, Fc gamma receptor IIb, autoantibodies, class switch recombination, autoantigens
MeSH terms
Animals, Autoantigens, B-Lymphocytes, Disease Models, Animal, Humans, Immunity, Innate, Lupus Erythematosus, Systemic, Lymphocyte Activation, Toll-Like Receptor 7, Toll-Like Receptor 9

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