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  • Title: Enzymatic hydrolysis of leukotriene A4 into 5,6-dihydroxy-7,9,11,14-eicosatetraenoic acid and LTB4 by mammalian kidney.
    Author: Medina JF, Haeggström J, Wetterholm A, Wallin A, Rådmark O.
    Journal: Biochem Biophys Res Commun; 1987 Mar 13; 143(2):697-703. PubMed ID: 3032177.
    Abstract:
    Homogenates from rat and pig kidney converted leukotriene A4 to 5,6-dihydroxy-7,9,11,14-eicosatetraenoic acid as well as leukotriene B4. Both hydrolyses were enzymatic as judged by the effects of heat treatment and proteolytic digestion. Upon subcellular fractionation, conversion of leukotriene A4 to 5,6-dihydroxy-7,9,11,14-eicosatetraenoic acid occurred both in the 105,000xg supernatant and the 20,000xg pellet from rat kidney, whereas conversion to leukotriene B4 was confined to the 105,000xg supernatant. We also found production of 5,6-dihydroxy-7,9,11,14-eicosatetraenoic acid and leukotriene B4 in isolated rat renal epithelial cells, either from exogenous leukotriene A4 or from this substrate supplied by human leukocytes.
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