Polycystic Kidneys Have Decreased Vascular Density: A Micro-CT Study

Rende Xu, Federico Franchi, Brent Miller, John A. Crane, Karen M. Peterson, Peter J. Psaltis, Peter C. Harris, Lilach O. Lerman, Martin Rodriguez-Porcel

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Objective: Polycystic kidney disease (PKD) is a common cause of end-stage renal failure and many of these patients suffer vascular dysfunction and hypertension. It remains unclear whether PKD is associated with abnormal microvascular structure. Thus, this study examined the renovascular structure in PKD. Methods: PKD rats (PCK model) and controls were studied at 10 weeks of age, and mean arterial pressure (MAP), renal blood flow, and creatinine clearance were measured. Microvascular architecture and cyst number and volume were assessed using micro-computed tomography, and angiogenic pathways evaluated. Results: Compared with controls, PKD animals had an increase in MAP (126.4 ± 4.0 vs. 126.2 ± 2.7 mmHg) and decreased clearance of creatinine (0.39 ± 0.09 vs. 0.30 ± 0.05 mL/min), associated with a decrease in microvascular density, both in the cortex (256 ± 22 vs. 136 ± 20 vessels per cm2) and medullar (114 ± 14 vs. 50 ± 9 vessels/cm2) and an increase in the average diameter of glomeruli (104.14 ± 2.94 vs. 125.76 ± 9.06 mm). PKD animals had increased fibrosis (2.2 ± 0.2 fold vs. control) and a decrease in the cortical expression in hypoxia inducible factor 1-α and vascular endothelial growth factor. Conclusions: PKD animals have impaired renal vascular architecture, which can have significant functional consequences. The PKD microvasculature could represent a therapeutic target to decrease the impact of this disease.

Original languageEnglish (US)
Pages (from-to)183-189
Number of pages7
JournalMicrocirculation
Volume20
Issue number2
DOIs
StatePublished - Feb 2013

Keywords

  • Angiogenesis
  • Cysts
  • Kidney
  • Micro-computed tomography
  • Polycystic kidney disease
  • Renal function.
  • Vasculature

ASJC Scopus subject areas

  • Physiology
  • Molecular Biology
  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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