Endothelial cell proliferation may be mediated VIA the production of endogenous lipoxygenase metabolites

  • Yamaja Setty B
  • Dubowy R
  • Stuart M
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Abstract

Endogenous regulators of endothelial cell proliferation have not been clearly defined. We investigated whether the cyclooxygenase and/or lipoxygenase metabolites are involved in this process, and report that lipoxygenase products can modulate endothelial cell growth. Nordihydroguaiaretic acid - a lipoxygenase inhibitor, inhibited endothelial cell proliferation as well as DNA synthesis. 5,8,11,14-Eicosatetraynoic acid - an inhibitor of both lipoxygenase and cyclooxygenase also inhibited endothelial cell DNA synthesis, while indomethacin - a selective cyclooxygenase inhibitor did not affect cell proliferation or DNA synthesis. While arachidonic acid stimulated DNA synthesis, this effect was completely abolished by nordihydroguaiaretic acid. These results demonstrate that products of the lipoxygenase pathway can affect endothelial cell proliferation. © 1987 Academic Press, Inc. All rights reserved.

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Authors

  • B. N. Yamaja Setty

  • Ronald L. Dubowy

  • Marie J. Stuart

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