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Related Experiment Videos

Endothelial monolayer permeability to macromolecules.

P J Del Vecchio, A Siflinger-Birnboim, J M Shepard

    Federation Proceedings
    |June 1, 1987
    PubMed
    Summary
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    Cultured endothelial monolayers reveal insights into microvessel permeability. Permeability depends on molecule size, cell origin, basement membrane, cell shape, and interendothelial space size.

    Area of Science:

    • Endothelial biology
    • Vascular physiology
    • Cellular permeability

    Background:

    • The barrier function of endothelial monolayers is crucial for microvessel permeability.
    • Investigating this function using cultured endothelium offers a controlled in vitro approach.
    • Understanding endothelial barrier function is key to comprehending microvessel wall permeability.

    Purpose of the Study:

    • To investigate the barrier function of cultured endothelial monolayers.
    • To elucidate factors influencing endothelial monolayer permeability in vitro.
    • To compare albumin permeability across different vascular-derived endothelial cells.

    Main Methods:

    • Utilized an in vitro endothelial monolayer system.
    • Assessed permeability to small- and large-molecular-weight substances.

    Related Experiment Videos

  • Examined albumin permeability in endothelial cells from pulmonary venous and arterial sites.
  • Investigated the role of basement membrane components.

    • Main Results:

    • Endothelial monolayers exhibit higher permeability to small molecules than large molecules.
    • Albumin permeability varies significantly between pulmonary venous and arterial endothelial cells.
    • Basement membrane components appear to influence albumin permeability.
    • Endothelial cell shape and interendothelial space size affect monolayer permeability.

    Conclusions:

    • Endothelial monolayer permeability is influenced by macromolecule characteristics (size, charge).
    • Cellular factors like endothelial cell shape and interendothelial space size are critical determinants.
    • Vascular site-specific differences exist in endothelial permeability.
    • In vitro models provide valuable insights into microvessel wall permeability.