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  • Title: Polymorphonuclear leukocytes produce thromboxane A2-like activity during phagocytosis.
    Author: Higgs GA, Bunting S, Moncada S, Vane JR.
    Journal: Prostaglandins; 1976 Nov; 12(5):749-57. PubMed ID: 981700.
    Abstract:
    Homogenates of phagocytosing polymorphonuclear leukocytes obtained from rabbit peritoneum were incubated with the prostaglandin endoperoxides PGG2 or PGH2. After 2 min at 0degree C, incubation mixtures contained an increased rabbit aorta contracting activity. Ether extracts of incubation mixtures contained a substance which contracted the superfused strips of rabbit aorta and coeliac artery and had a half life which was similar to thromboxane A2. The generation of thromboxane A2-like activity from PG endoperoxides was prevented by boiling the homogenate prior to incubation, or by pretreatment with benzydamine, a drug which blocks thromboxane formation in platelets. Production of thromboxane A2-like material by leukocyte homogenates was compared with platelet microsomal thromboxane synthetase.
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