Lipoxygenase activity in heart cells.
Arachidonic acid (AA) metabolism via the lipoxygenase (LOX) pathway in rat hearts and in cultured rat cardiomyocytes was investigated using 1-[14C]AA. LOX activity was detected in the microsomal fraction, in the high speed supernatant prepared from rat hearts and in rat cardiomyocyte supernatant. LOX products from all fractions comigrated in thin layer chromatography as 12-hydroxyeicosatetraenoic acid (12-HETE) and 15-HETE. Enzyme linked immunosorbent assay for 12-HETE showed its formation by the microsomal fraction, the ammonium sulfate (AS) pellet, and by rat cardiomyocyte supernatant, while radioimmunoassay for 15-HETE showed its formation only by the AS pellet. The properties of LOX in each fraction are reported here.
Department of Life Sciences, Bar-Ilan University, Ramat Gan, Israel.
E
E
Breitbart
Y
Y
Sofer
A
A
Shainberg
S
S
Grossman
D019377:12-Hydroxy-5,8,10,14-eicosatetraenoic Acid / Q000302:isolation & purification / Q000378:metabolism; D000818:Animals; D016718:Arachidonic Acid / Q000378:metabolism; D002478:Cells, Cultured; D003600:Cytosol / Q000201:enzymology; D005260:Female; D006893:Hydroxyeicosatetraenoic Acids / Q000302:isolation & purification / Q000378:metabolism; D007700:Kinetics; D008084:Lipoxygenase / Q000378:metabolism*; D008861:Microsomes / Q000201:enzymology*; D009206:Myocardium / Q000201:enzymology*; D051381:Rats
D006893:Hydroxyeicosatetraenoic Acids; D016718:Arachidonic Acid; D019377:12-Hydroxy-5,8,10,14-eicosatetraenoic Acid; C025984:15-hydroxy-5,8,11,13-eicosatetraenoic acid; D008084:Lipoxygenase