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Complement activation and regulation in rheumatic disease.

Douwe J Dijkstra1, Jivan V Joeloemsingh1, Ingeborg M Bajema2

  • 1Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, the Netherlands.

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|November 14, 2019
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Summary
This summary is machine-generated.

The complement system is crucial for immunity but can harm tissues in rheumatic diseases. Understanding complement activation and regulation is key to developing new treatments for organ damage.

Keywords:
AutoimmunityComplementRegulationRheumatic disease

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Area of Science:

  • Immunology
  • Rheumatology

Background:

  • The complement system is vital for innate and adaptive immunity against infections.
  • Aberrant complement activation can cause organ damage in various diseases, particularly rheumatic conditions.

Purpose of the Study:

  • To review the roles of complement activation and regulation in rheumatic diseases.
  • To explore how complement contributes to tissue damage in these conditions.

Main Methods:

  • Review of existing literature on complement in rheumatic diseases.
  • Analysis of evidence suggesting complement's role based on activation fragments.
  • Discussion of challenges in distinguishing activation from regulation in observational studies.

Main Results:

  • Complement activation is implicated in rheumatic diseases, often via immune complex deposition.
  • Reduced regulation by endogenous complement inhibitors can exacerbate tissue damage.
  • Distinguishing cause and effect of complement activity in human observational studies remains challenging.

Conclusions:

  • Complement plays a significant, though often complex, role in the pathology of rheumatic diseases.
  • Further research, including human therapeutic trials targeting complement, is needed to clarify its precise contribution to disease progression and tissue damage.