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[The complement activation system in acute poststreptococcal glomerulonephritis]
Insights
Complement system activation is key in post-streptococcal glomerulonephritis. Measuring complement levels aids diagnosis, showing decreased C3 and haemolytic complement in children, which normalized within six weeks.
Area of Science:
- Immunology
- Clinical Medicine
Context:
- The complement system plays a crucial role in immune responses.
- Measuring complement activation products is a valuable diagnostic and prognostic tool.
- Acute post-streptococcal glomerulonephritis (APSGN) is a common childhood kidney disease.
Purpose:
- To investigate complement system activation in children with APSGN.
- To correlate complement levels with clinical recovery.
- To determine the activation pathways involved in APSGN.
Summary:
- This study followed 54 children with APSGN, finding decreased C3 component and haemolytic complement levels in all patients at disease onset.
- Complement levels significantly improved, returning to normal ranges within six weeks.
- Activation predominantly involved the classical pathway, with evidence of alternative pathway involvement as well.
- A correlation was observed between clinical improvement and reduced complement component metabolism.
Impact:
- Provides insights into the immunopathogenesis of APSGN.
- Highlights the utility of complement component monitoring for assessing disease activity and recovery in APSGN.
- Suggests potential therapeutic targets within the complement cascade for APSGN management.
Abstract:
The activation of the complement system is very important part of the immunologic process. Measuring levels of products of complement activation is a useful diagnostic and prognostic procedure. This report presents the results of a follow-up of 54 children with acute poststreptococcal glomerulonephritis. At the beginning of the disease, all patients (i. e. 100%) had decreased levels of C3 component of the complement system, and 72.2% patients had decreased levels of the haemolytic complement. The mean value of the control measurements increased significantly from one measurement to another (with p < 0.01, and within 6 weeks after the beginning of the disease, it reached the normal range. According to our results, the activation of the complement system was induced by the classical pathway. We cannot explain why the component C4 did not take part in it. According to the results of the haemolytic assay, the alternative pathway of activation was used too. We found that there was a correlation between improvement of clinical features and decrease of metabolisation of complement components.