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Polymorphism of C3 components and the B factor in patients with chronic renal failure, dialyzed iteratively
Insights
Patients with chronic renal failure (CRF) undergoing dialysis show decreased complement system components, including C3 and Factor B. This suggests complement activation, possibly linked to CRF or hemodialysis itself.
Area of Science:
- Immunology
- Nephrology
Background:
- Chronic renal failure (CRF) is a complex condition affecting multiple physiological systems.
- The complement system plays a crucial role in immune response and inflammation.
- Hemodialysis is a common treatment for CRF, but its effects on the immune system are not fully understood.
Purpose of the Study:
- To investigate the levels of complement components C3, C3 cleavage products, and Factor B in patients with CRF undergoing iterative hemodialysis.
- To determine if complement activation occurs in these patients and to explore potential contributing factors.
Main Methods:
- Quantification of C3, C3 cleavage components, and Factor B activity.
- Comparison of complement component levels between 25 normal controls and 22 CRF patients undergoing hemodialysis.
- Serial measurements were taken at three different time points.
Main Results:
- Patients with CRF exhibited significantly lower levels of C3 and Factor B compared to normal controls.
- Progressive hypomorphism of C3 cleavage components was observed in CRF patients.
- Results suggest activation of the complement alternative pathway, with possible involvement of the classic pathway.
Conclusions:
- Hemodialysis patients with CRF display evidence of complement system activation.
- This activation may be attributed to the underlying disease causing CRF or factors introduced during hemodialysis.
- Further research is needed to elucidate the precise mechanisms and clinical implications of complement activation in CRF patients undergoing dialysis.
Abstract:
The value of C3, of the cleavage C3 components and of the B factor were determined in 25 normal controls and in 22 patients with chronic renal failure (CRF), iteratively dialyzed. Low values of C3 and progressive hypomorphism of the cleavage components of C3 were observed in the patients at the three moments of determination. The activity of the B factor was also found significantly decreased in the patients. Our results indicated an activation of the complement alternative pathway in the dialyzed patients but the activation through the classic pathway, could not be excluded either. It is concluded that this activation might be due to the initial disease which generated CRF but also to some factors transported by hemodialysis.