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Assessment of Vascular Function in Patients With Chronic Kidney Disease
Published on: June 16, 2014
Glomerular endothelial dysfunction in chronic kidney disease
Narisa Futrakul1, Tasanee Panichakul, Stis Sirisinha
1Department of Physiology, Faculty of Medicine, King Chulalongkorn Memorial Hospital, Bangkok, Thailand. fmednft@md2.md.chula.ac.th
Insights
Glomerular endothelial dysfunction, marked by increased cell damage and altered kidney blood flow, is evident in chronic kidney disease (CKD) patients. This dysfunction likely drives disease progression in CKD.
Area of Science:
- Nephrology
- Vascular Biology
- Pathophysiology
Background:
- Chronic kidney disease (CKD) is a significant global health concern.
- Glomerular endothelial dysfunction is increasingly recognized as a key factor in CKD progression.
Purpose of the Study:
- To investigate glomerular endothelial function in patients with chronic kidney disease.
- To correlate endothelial cell health and intrarenal hemodynamics with CKD.
Main Methods:
- In vitro endothelial cell cytotoxicity assays were performed.
- In vivo intrarenal hemodynamic studies were conducted.
- Measurements included renal plasma flow, peritubular capillary flow, and arteriolar resistance.
Main Results:
- CKD patients exhibited significantly enhanced endothelial cell cytotoxicity (26.5% vs 0.4% in controls).
- Intrarenal hemodynamics were altered, showing reduced renal plasma flow and peritubular capillary flow.
- Elevated intraglomerular hydrostatic pressure and increased afferent/efferent arteriolar resistance were observed in CKD patients.
Conclusions:
- Glomerular endothelial dysfunction is a prominent feature in chronic kidney disease.
- The observed endothelial cell cytotoxicity and hemodynamic alterations contribute to disease progression.
- Targeting endothelial dysfunction may offer therapeutic strategies for CKD.
Abstract:
A dysfunctioning glomerular endothelium was demonstrated in chronic kidney disease (CKD) patients by means of in vitro endothelial cell cytotoxicity test and of in vivo intrarenal hemodynamic study. An enhanced endothelial cell cytotoxicity in CKD patients was 26.5 +/- 12% as compared to 0.4 +/- 1% of control. An altered intrarenal hemodynamics revealed 1) a reduction in renal plasma flow, 190 +/- 67 mL/min/1.73 m2 versus control 595 +/- 45 mL/min/1.73 m2, and in peritubular capillary flow, 149 +/- 55 mL/min/1.73 m2 versus control 479 +/- 46 mL/min/1.73 m2, 2) an elevated intraglomerular hydrostatic pressure, 55 +/- 2 mmHg versus control 51 mmHg, elevated afferent arteriolar resistance, 13184 dyne x s x cm(-5) versus control 2443 +/- 154 dyne x s x cm(5), and elevated efferent arteriolar resistance, 13591 +/- 7591 dyne x s x cm(-5) versus control 3062 +/- 177 dyne x s x cm(-5). Both enhanced endothelial cell cytotoxicity and altered intrarenal hemodynamics reflect glomerular endothelial dysfunction which is likely responsible for the renal disease progression in CKD.
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