The Open Arthritis Journal




(Discontinued)

ISSN: 1876-5394 ― Volume 7, 2014

Antigen-Presenting Cells and their Fcγ and Toll-Like Receptors: Leading Suspects in Autoimmunity



Kim C.M. Santegoets, Lenny van Bon, Mark H. Wenink*, Wim B. van den Berg
Radboud University Nijmegen Medical Centre, Department of Rheumatology, The Netherlands

Abstract

Antigen-presenting cells (APCs) play an important role in the development of autoimmune diseases. These cells recognize pathogen associated molecular patterns but also endogenously produced ligands through toll-like receptors (TLRs). Aberrant activation of these receptors and the following intracellular signaling pathways can induce the deleterious production of pro-inflammatory cytokines. In genetically predisposed individuals this might lead to a breach in tolerance and eventually autoimmunity. IgG and IgG immune complexes (ICs), which are abundantly present in autoimmune diseases like systemic lupus erythematosus (SLE), rheumatoid arthritis (RA) and systemic sclerosis (SSc) are recognized by APCs via Fc gamma receptors (FcγRs) and can also modulate their activation state. Upon their uptake specific antigens present in ICs are capable of stimulating APCs via their intracellular TLRs, increasing their capability to induce (autoreactive) T and B cell responses. This underscores their likely role in the generation and maintenance of autoimmunity. By focusing on three autoimmune diseases, SLE, RA and SSc, we will illustrate the importance of TLRs and FcγRs in the pathogenesis of autoimmune diseases.

Keywords : Toll Like Receptors, Fc gamma receptors, Antigen-presenting cells, Systemic lupus erythematosus, Rheumatoid arthritis, Systemic sclerosis.

Article Information


Identifiers and Pagination:

Year: 2010
Volume: 3
First Page: 37
Last Page: 46
Publisher Id: TOARTHJ-3-37
DOI: 10.2174/1876539401003010037

Article History:

Received Date: 15/6/2009
Revision Received Date: 7/10/2009
Acceptance Date: 29/10/2009
Electronic publication date: 12/1/2010
Collection year: 2010

© Santegoets et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.


* Address correspondence to this author at the Radboud University Nijmegen Medical Centre, Department of Rheumatology, The Netherlands; Tel: +31243540403; Fax: +31243610516; E-mail: m.wenink@reuma.umcn.nl


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