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Glomerular Density in Biopsy-Proven Hypertensive Nephrosclerosis
Kotaro Haruhara1, Nobuo Tsuboi2, Go Kanzaki1
1Department of Internal Medicine, Division of Nephrology and Hypertension, The Jikei University School of Medicine, Minato-Ku, Tokyo, Japan.
American Journal of Hypertension
|January 30, 2015
Summary
Hypertensive nephrosclerosis (HNS) patients often have a reduced number of nephrons, indicated by lower glomerular density (GD). This reduced GD is particularly pronounced in HNS patients with significant proteinuria.
Area of Science:
- Nephrology
- Pathology
- Hypertension Research
Background:
- Reduced nephron number is linked to hypertension and chronic kidney disease.
- The role of nephron number in hypertensive nephrosclerosis (HNS) remains unclear.
Purpose of the Study:
- To investigate the significance of nephron number, estimated by glomerular density (GD), in patients with biopsy-proven hypertensive nephrosclerosis (HNS).
Main Methods:
- Cross-sectional study of 58 HNS patients with preserved renal function (eGFR ≥ 60 ml/min/1.73 m²).
- Glomerular density (GD) assessed as a surrogate for nephron number in renal biopsy specimens.
- Comparison with renal biopsies from kidney transplant donors as healthy controls.
Main Results:
- HNS patients exhibited significantly lower GD (2.0/mm²) compared to controls (3.2/mm²).
- Lower GD was observed in HNS patients with overt proteinuria (≥1 g/day) versus mild proteinuria (<1 g/day).
- GD correlated with urinary protein excretion, independent of other histopathological factors.
Conclusions:
- Low glomerular density (GD) is a characteristic histological finding in hypertensive nephrosclerosis (HNS).
- Reduced GD is especially prominent in HNS patients presenting with overt proteinuria.
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