Endothelium-derived relaxing factor from cultured human endothelial cells inhibits aggregation of human platelets.

作者: Ute Alheid , Jürgen C. Frölich , Ulrich Förstermann

DOI: 10.1016/0049-3848(87)90361-6

关键词:

摘要: The present study was designed to investigate whether endothelium-derived relaxing factor (EDRF) produced by cultured human endothelial cells (HEC) inhibits the aggregation of platelets. Microcarrier beads covered with HEC from umbilical veins ( ∼ 2 × 106) or empty (as controls) were co-incubated in an aggregometer washed platelets 5 107). Indomethacin throughout and no prostacyclin production (measured as 6-keto-PGF1α radioimmunoassay) could be detected. presence markedly inhibited thrombin-induced platelet this inhibition further enhanced bradykinin, a stimulator EDRF production. anti-platelet aggregatory effect blocked treating inhibitor gossypol, soluble guanylate cyclase methylene blue, adding scavenger oxyhemoglobin mixture. antiaggregatory material labile, since supernatant indomethacin-treated did not inhibit aggregation. In absence indomethacin, prostacyclin-mediated blue hemoglobin. These data strongly suggest that formed is may constitute important defense mechanism against vasospasm

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