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Elastase activity in capillary and aortic endothelial cells.

D C West, S Kumar

    Anticancer Research
    |September 1, 1986
    PubMed
    Summary
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    Bovine endothelial cells exhibit distinct elastase activity. Aortic cells secrete elastase, unlike capillary cells, with no observed modulation by TAF, heparin, or TPA.

    Area of Science:

    • Biochemistry
    • Cell Biology
    • Vascular Biology

    Background:

    • Endothelial cells play crucial roles in vascular homeostasis and disease.
    • Proteinases, such as elastase, are involved in endothelial cell function and extracellular matrix remodeling.
    • Understanding differential proteinase activity in various endothelial cell types is important for vascular research.

    Purpose of the Study:

    • To investigate and compare cellular and secreted proteinase activity in bovine capillary and aortic endothelial cells.
    • To characterize the biochemical properties (pH optimum, inhibition profile) of elastase in these cell types.
    • To determine the effect of specific factors (TAF, heparin, TPA) on elastase activity.

    Main Methods:

    • Isolation and culture of bovine capillary and aortic endothelial cells.

    Related Experiment Videos

  • Assay of cellular and secreted proteinase activity, focusing on elastase.
  • Characterization of elastase activity using pH optima and specific inhibitors.
  • Treatment of cells with tumor angiogenesis factor (TAF), heparin, and 12-O-tetradecanoyl-phorbol-acetate (TPA) to assess their effects.

    • Main Results:

    • Both bovine capillary and aortic endothelial cells demonstrated significant cellular elastase activity.
    • Differences were observed in the level of elastase activity, pH optimum, and inhibition profiles between the two cell types.
    • Elastase secretion was detected exclusively in aortic endothelial cells.
    • Tumor angiogenesis factor (TAF), heparin, and TPA did not influence cell-associated or secreted elastase levels.

    Conclusions:

    • Bovine aortic and capillary endothelial cells possess distinct cellular and secreted elastase profiles.
    • Aortic endothelial cells are a source of secreted elastase, suggesting a role in extracellular matrix regulation.
    • The investigated factors (TAF, heparin, TPA) do not modulate elastase activity in these endothelial cells, indicating specific regulatory mechanisms.