Digital imaging system and virtual instrument platform for measuring hydraulic conductivity of vascular endothelial monolayers

Christopher G. Hubert, Scott W. McJames, Ian Mecham, Randal O. Dull

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

We have developed an automated, digital imaging system, controlled by two virtual instruments, to measure hydraulic conductivity (Lp) of cultured endothelial monolayers. Live digital images of multiple independent experiments were captured by custom-designed video processing software running in National Instruments LabVIEW 6.1. Fluid displacement data are automatically displayed in real time as both volumetric flux (Jv) and hydraulic conductivity (Lp). A separate data analysis program is used to display permeability values from stored displacement measurements and displays Jv or Lp of each monolayer. Optional statistical filters have been included to aid in data analysis. This new digital permeability system is able to measure flux rates over a dynamic range from 10-9 cm/s/cm H2O to 10-4 cm/s/cm H2O. Values obtained for cultured lung microvascular Lp are nearly identical to other cultured endothelial monolayers and also to values obtained in-vivo using the Landis-Michel technique and the split-drop method. The use of a commercially available platform allows the system configuration to be easily modified to suit the experimental needs. The technical development of this system is described in detail.

Original languageEnglish (US)
Pages (from-to)135-140
Number of pages6
JournalMicrovascular Research
Volume71
Issue number2
DOIs
StatePublished - Mar 1 2006
Externally publishedYes

Keywords

  • Cell culture
  • Endothelial cell
  • Hydraulic conductivity
  • Lung
  • Microvascular
  • Virtual instrument

ASJC Scopus subject areas

  • Biochemistry
  • Cardiology and Cardiovascular Medicine
  • Cell Biology

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