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Updated: Aug 12, 2026

Measuring the 50% Haemolytic Complement (CH50) Activity of Serum
Published on: March 29, 2010
Blood level of C3 complement component as an aid in the management of acute phase glomerulonephritis
Insights
Low C3 complement levels in patients with acute glomerulonephritis indicate a severe disease course. This finding suggests C3 serum levels can predict inflammatory severity in acute glomerulonephritis management.
Area of Science:
- Nephrology
- Immunology
- Clinical Pathology
Background:
- Acute glomerulonephritis is an inflammatory kidney disease.
- Complement system activation plays a role in glomerulonephritis pathogenesis.
- Understanding disease severity indicators is crucial for patient management.
Purpose of the Study:
- To investigate the correlation between serum complement component levels and disease severity in acute glomerulonephritis.
- To determine if complement levels can predict the acute phase course of the disease.
Main Methods:
- Ninety-five patients with pathologically confirmed acute glomerulonephritis were studied.
- Serum levels of complement components C3 and C4 were measured.
- Patient disease severity was scored and correlated with complement levels.
Main Results:
- Patients with low C3 serum levels exhibited a more severe acute disease course compared to those with normal C3 levels.
- No significant correlation was found between C4 serum levels and disease severity.
- C3 levels demonstrated a significant association with inflammatory severity.
Conclusions:
- Serum C3 levels may serve as a valuable indicator of inflammatory severity in acute glomerulonephritis.
- C3 level assessment could aid in the initial management and prognosis of patients with acute glomerulonephritis.
Abstract:
Ninety-five patients with acute glomerulonephritis, based upon clearly defined pathological criteria, were studied and scored. The scoring was correlated to their levels of blood complement components. Patients with low C3 serum levels had a severe course during the acute phase of their disease, as compared with those with normal C3 serum levels. No such correlation was established with regard to C4 serum levels. It is suggested that C3 serum level may serve as an indicator of the expected severity of the inflammatory process and thus as an aid in the management of patients with acute glomerulonephritis in the initial phase of the disease.
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