The hydraulic conductivity of Matrigel

Biorheology. 2007;44(5-6):303-17.

Abstract

In this study, we measured the specific hydraulic conductivity (K) of Matrigel at 1% and 2% concentrations as a function of perfusion pressure (0 to 100 mmHg) and compared the results to predictions from two models: a fiber matrix model that predicted K of the gel based upon its composition, and a biphasic model that predicted changes in K caused by pressure induced compaction of the gels. The extent of gel compaction as a function of perfusion pressure was also assessed, allowing us to estimate the stiffness of the gels. As expected, 2% Matrigel had a lower K and a higher stiffness than did 1% Matrigel. Measured values of K of both 1% and 2% Matrigel samples showed good agreement with the predictions of the fiber matrix model. Pressure-induced changes in K were better described by the biphasic model than a model in which uniform compression of the gel was assumed. We conclude that K of multi-component gels, such as Matrigel can be well characterized by fiber matrix models, and that pressure-induced changes in K of such gels can be well characterized by biphasic models.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Basement Membrane / physiology
  • Collagen / chemistry*
  • Drug Combinations
  • Laminin / chemistry*
  • Models, Biological*
  • Pressure
  • Proteoglycans / chemistry*
  • Rheology

Substances

  • Drug Combinations
  • Laminin
  • Proteoglycans
  • matrigel
  • Collagen