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A Novel Three-Dimensional Human Peritubular Microvascular System.

Giovanni Ligresti1, Ryan J Nagao2, Jun Xue2

  • 1Departments of Bioengineering, Medicine.

Journal of the American Society of Nephrology : JASN
|December 15, 2015
PubMed
Summary
This summary is machine-generated.

Researchers characterized human kidney microvascular endothelial cells (HKMECs) and developed a 3D model. This model successfully mimics kidney microvasculature structure and function, offering new insights into kidney health.

Keywords:
angiogenesisendothelial cellsfenestraekidneymicrophysiological systemperitubular microvessels

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Area of Science:

  • Nephrology
  • Vascular Biology
  • Endothelial Cell Biology

Background:

  • Human kidney peritubular capillaries are vulnerable to injury, leading to impaired kidney function.
  • The precise structure and function of human kidney microvasculature remain poorly understood.
  • Understanding kidney microvasculature is crucial for addressing kidney disease.

Purpose of the Study:

  • To isolate, purify, and characterize human kidney peritubular microvascular endothelial cells (HKMECs).
  • To develop a functional three-dimensional (3D) human kidney microvasculature model.
  • To investigate the unique properties of HKMECs and their behavior in a microenvironment.

Main Methods:

  • HKMECs were isolated and purified using epithelial cell depletion and specific culture conditions.
  • High concentrations of vascular endothelial growth factor (VEGF) were utilized to promote HKMEC survival and growth.
  • A flow-directed microphysiologic system was used to reconstitute the 3D human kidney microvasculature.

Main Results:

  • Highly pure HKMECs were obtained in large quantities, showing dependence on high VEGF concentrations.
  • Isolated HKMECs displayed high tubulogenic potential but low angiogenic potential.
  • The 3D model formed a thin, fenestrated endothelium with a functional permeability barrier under flow.
  • HKMECs exhibited a distinct transcriptional profile compared to other endothelial cells.

Conclusions:

  • The developed 3D microphysiologic system accurately recapitulates human kidney microvascular structure and function.
  • HKMECs possess unique phenotypic characteristics distinct from other microvascular endothelial cells.
  • This HKMEC-specific model provides a valuable platform for studying kidney microvascular diseases and potential therapeutics.