Journal
MOLECULAR IMMUNOLOGY
Volume 48, Issue 14, Pages 1656-1665Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.molimm.2011.04.024
Keywords
Complement; Antibody; Autoimmunity; Therapy
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The complement system is a key part of the innate immune system and plays an important role in the clearance of pathogens and apoptotic cells upon its activation. It is well known that both IgG and IgM can activate complement via the classical pathway by binding of C1q to the Fc regions of these immunoglobulins. Recent advances have shown that also IgA is capable of activating the complement system. Besides, more insight is gained into an additional role for antibodies in the activation of both the alternative and the lectin pathways. Mouse models have shown that auto-antibodies can activate the alternative pathway and induce in cell lysis and tissue damage. Besides the role of antibodies in complement activation, complement may also be a target for recognition by antibodies directed against autologous complement components. These auto-antibodies play a role in several diseases, especially vascular diseases. Understanding how antibodies interact with the complement system will allow the manipulation of this interaction to diminish pathological consequences of auto-antibodies and optimize the effect of therapeutic antibodies. In the current review, we discuss complement activation by (auto-) antibodies by the different pathways. (C) 2011 Elsevier Ltd. All rights reserved.
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