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Stem cell factor and crescentic glomerulonephritis.
Mohsen M H El Kossi1, A Meguid El Nahas
1Sheffield Kidney Institute, University of Sheffield, Sheffield, UK.
Summary
Mast cells and stem cell factor (SCF) are involved in crescentic glomerulonephritis (CGN). Increased mast cells and SCF in kidney biopsies correlate with disease severity and fibrosis, suggesting their role in CGN pathogenesis.
Area of Science:
- Nephrology
- Immunology
- Pathology
Background:
- Crescentic glomerulonephritis (CGN) pathogenesis involves various cells and cytokines.
- Mast cells and stem cell factor (SCF) are increasingly recognized for their roles in tissue inflammation and fibrosis.
Purpose of the Study:
- To investigate the presence and role of mast cells, SCF, and its receptor (c-kit) in renal biopsy specimens of patients with CGN.
- To correlate the expression of these markers with disease severity and fibrosis.
Main Methods:
- Immunohistochemical analysis of 28 CGN renal biopsy specimens for mast cells, SCF, c-kit, CD34+, CD68+, and alpha-SMA+ cells.
- Comparison with control kidney specimens.
- Quantification of SCF, alpha-SMA, and collagen expression, and assessment of glomerular and interstitial fibrosis scores.
Main Results:
- CGN patients showed increased interstitial mast cells, glomerular CD68+ cells, and interstitial c-kit+ cells compared to controls.
- Elevated glomerular and interstitial SCF correlated with proteinuria and disease progression.
- Interstitial mast cell count predicted interstitial fibrosis.
Conclusions:
- Mast cells and the SCF/c-kit pathway are potentially involved in the pathogenesis of crescentic glomerulonephritis.
- These findings highlight mast cells as a therapeutic target in CGN.