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Updated: Apr 20, 2026

Analyses of Proteinuria, Renal Infiltration of Leukocytes, and Renal Deposition of Proteins in Lupus-prone MRL/lpr Mice
Published on: June 8, 2022
Complement and glomerular diseases
Reena J Popat1, Michael G Robson
1King's College London, London, UK.
Insights
The complement pathway is crucial in kidney diseases, impacting both innate and adaptive immunity. Understanding its role in glomerular diseases offers new therapeutic targets.
Area of Science:
- Immunology
- Nephrology
- Pathogenesis of Glomerular Diseases
Background:
- The complement pathway is integral to the immune system, influencing innate and adaptive responses.
- Clinical evidence, including biopsy findings and genetic data, links complement to glomerular disease pathogenesis.
- Animal models provide mechanistic insights into complement's role in kidney pathology.
Purpose of the Study:
- To review the role of the complement system in the pathogenesis of glomerular diseases.
- To discuss evidence from human patients and animal models for specific glomerular diseases.
- To explore potential therapeutic implications targeting the complement pathway.
Main Methods:
- Review of clinical findings in patients with glomerular diseases.
- Analysis of data from animal models of glomerular diseases.
- Synthesis of information on complement components, autoantibodies, and genetic mutations.
Main Results:
- Complement activation is implicated in atypical hemolytic uremic syndrome, C3 glomerulopathy, ANCA vasculitis, lupus nephritis, and membranous nephropathy.
- Presence of complement in biopsies and genetic factors correlate with disease development.
- Consumption of complement factors in circulation indicates active disease.
Conclusions:
- The complement pathway plays a significant role in the development and progression of various glomerular diseases.
- Targeting the complement system presents a promising therapeutic strategy for managing these kidney conditions.
- Further research into complement-mediated mechanisms can refine treatment approaches for glomerular pathologies.
Abstract:
The complement pathway is a central part of the innate immune system and also modulates adaptive immunity. It is implicated in the pathogenesis of glomerular disease by a number of clinical findings. These include the presence of complement components in renal biopsy samples, decreases in circulating levels indicating consumption, the presence of autoantibodies to complement proteins and the association of genetic mutations with disease either in individuals or within families. Further support and mechanistic insights comes from animal models. This review provides an overview of the role of complement in glomerular diseases and discusses the data from patients and animal models with reference to specific diseases. These include atypical haemolytic uraemic syndrome, C3 glomerulopathy, anti-neutrophil cytoplasmic antibody vasculitis, lupus nephritis and membranous nephropathy. The implications for therapy are also discussed.
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