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Update on C3 glomerulopathy

Thomas D Barbour1, Marieta M Ruseva1, Matthew C Pickering1

  • 1Centre for Complement and Inflammation Research (CCIR), Division of Immunology and Inflammation, Department of Medicine, Imperial College London, London W12 0NN, UK.

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
|October 19, 2014
PubMed

Insights

C3 glomerulopathy involves abnormal complement system control, leading to kidney damage. Recent research clarifies its causes, focusing on complement factor H-related proteins and potential new treatments.

Area of Science:

  • Nephrology
  • Immunology
  • Genetics

Background:

  • C3 glomerulopathy is characterized by excessive C3 fragment deposition in the glomerulus, causing kidney damage.
  • The primary issue is dysregulated complement activation, specifically uncontrolled C3b amplification.
  • Abnormal complement factor H-related (CFHR) proteins are implicated in some cases, potentially by disrupting complement factor H (CFH) regulation.

Purpose of the Study:

  • To summarize recent advancements in understanding C3 glomerulopathy pathogenesis.
  • To highlight updated case definitions and diagnostic recommendations.
  • To review emerging therapeutic strategies for C3 glomerulopathy.

Main Methods:

  • Review of recent clinicopathological cohort studies.
  • Analysis of family studies investigating CFHR protein abnormalities.
  • Synthesis of published clinical experiences with complement-targeted therapies.

Main Results:

  • Uncontrolled C3b amplification is identified as a key pathogenic mechanism.
  • Structurally abnormal CFHR proteins are linked to C3 glomerulopathy through 'CFH de-regulation'.
  • A 2013 consensus report refined case definitions and treatment guidelines.

Conclusions:

  • Understanding of C3 glomerulopathy pathogenesis has significantly improved.
  • Targeted therapies, including C5 inhibitors, show early clinical promise.
  • Continued research is crucial for refining diagnosis and treatment of this rare kidney disease.

Keywords:
C3 glomerulopathycomplementdense depositfactor H

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