PMID- 6405454 OWN - NLM STAT- MEDLINE DCOM- 19830610 LR - 20190825 IS - 0090-6980 (Print) IS - 0090-6980 (Linking) VI - 25 IP - 1 DP - 1983 Jan TI - Resolution by DEAE-cellulose chromatography of the enzymatic steps in the transformation of arachidonic acid into 8, 11, 12- and 10, 11, 12-trihydroxy-eicosatrienoic acid by the rat lung. PG - 79-84 AB - The 30-50% ammonium sulfate fraction of the high speed supernatant (100,000 xg) of a rat lung homogenate is capable of catalysing the conversion of arachidonic acid into 8,11,12- and 10,11, 12-trihydroxyeicosatrienoic acids. This enzyme preparation was resolved through DEAE cellulose chromatography into three stages which were assayed with precursors specific for each stage. Thus in the first stage arachidonic acid is converted by 12-lipoxygenase into 12-hydroperoxy-5,8,10,14-eicosatetraenoic acid (12-HPETE) detected as the corresponding 12-hydroxy product (12-HETE). 12-HPETE in turn is converted into 8-hydroxy-11,12-epoxy-5,9,14-eicosatrienoic acid and 10-hydroxy-11,12-epoxy-5,8,14-eicosatrienoic acid. These epoxides are in turn selectively converted through an epoxide hydrase into the respective triols. While the first and third stages were carried out by distinct fractions from the DEAE columns, the second i.e. conversion of 12-HPETE into epoxides, was detected in all fractions as was the reduction of 12-HPETE into 12-HETE. FAU - Pace-Asciak, C R AU - Pace-Asciak CR FAU - Mizuno, K AU - Mizuno K FAU - Yamamoto, S AU - Yamamoto S LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Prostaglandins JT - Prostaglandins JID - 0320271 RN - 0 (Arachidonic Acids) RN - 0 (Fatty Acids, Unsaturated) RN - 0 (Leukotrienes) RN - 27YG812J1I (Arachidonic Acid) RN - 59985-28-3 (12-Hydroxy-5,8,10,14-eicosatetraenoic Acid) RN - 67675-13-2 (12-HPETE) RN - 68860-46-8 (8,11,12-trihydroxy-5,9,14-eicosatrienoic acid) RN - 85589-25-9 (10,11,12-trihydroxyeicosatrienoic acid) RN - EC 1.13.11.12 (Lipoxygenase) RN - EC 3.3.2.- (Epoxide Hydrolases) RN - FC398RK06S (8,11,14-Eicosatrienoic Acid) SB - IM MH - 12-Hydroxy-5,8,10,14-eicosatetraenoic Acid MH - 8,11,14-Eicosatrienoic Acid/analogs & derivatives/*biosynthesis MH - Animals MH - Arachidonic Acid MH - Arachidonic Acids/*metabolism MH - Biotransformation MH - Chromatography, DEAE-Cellulose/methods MH - Epoxide Hydrolases/metabolism MH - Fatty Acids, Unsaturated/*biosynthesis MH - *Leukotrienes MH - Lipoxygenase/metabolism MH - Lung/*metabolism MH - Rats EDAT- 1983/01/01 00:00 MHDA- 1983/01/01 00:01 CRDT- 1983/01/01 00:00 PHST- 1983/01/01 00:00 [pubmed] PHST- 1983/01/01 00:01 [medline] PHST- 1983/01/01 00:00 [entrez] AID - 0090-6980(83)90137-5 [pii] AID - 10.1016/0090-6980(83)90137-5 [doi] PST - ppublish SO - Prostaglandins. 1983 Jan;25(1):79-84. doi: 10.1016/0090-6980(83)90137-5.