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Role of complement in IgA nephropathy.

Mohamed R Daha1, Cees van Kooten2

  • 1Department of Nephrology, Leiden University Medical Center, Albinusdreef 2, 2333ZA, Leiden, The Netherlands.

Journal of Nephrology
|November 15, 2015
PubMed
Summary
This summary is machine-generated.

Immunoglobulin A nephropathy (IgAN) involves IgA1 deposition, activating mesangial cells and inflammation. Complement system activation, particularly the lectin pathway, is increasingly linked to IgAN progression.

Keywords:
C4dComplementIgA nephropathyMBL

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Area of Science:

  • Nephrology
  • Immunology
  • Complement System Biology

Background:

  • Immunoglobulin A nephropathy (IgAN) is defined by mesangial IgA deposition.
  • Deposited IgA, primarily polymeric IgA1, activates mesangial cells, releasing inflammatory mediators.
  • IgA activates the complement system, traditionally linked to the alternative pathway.

Purpose of the Study:

  • To review the role of the complement system in IgA-mediated inflammation in IgAN.
  • To highlight the emerging association between the lectin pathway and IgAN progression.

Main Methods:

  • Literature review of studies on IgAN pathogenesis.
  • Analysis of research on complement activation pathways in IgAN.
  • Synthesis of findings on IgA, mesangial cell activation, and inflammation.

Main Results:

  • Polymeric IgA1 deposition is central to IgAN pathogenesis.
  • Complement activation significantly amplifies mesangial cell activation and inflammation.
  • Evidence suggests the lectin pathway plays a crucial role in IgAN progression, beyond the alternative pathway.

Conclusions:

  • The complement system, especially the lectin pathway, is a key driver of inflammation in IgAN.
  • Understanding complement's role offers potential therapeutic targets for IgAN.
  • Further research into complement modulation may improve IgAN treatment strategies.