Reaction Process: WikiPathways:WP5137
Linoleic acid oxylipin metabolism related metabolites
find 13 related metabolites which is associated with chemical reaction(pathway) Linoleic acid oxylipin metabolism
12(13)-EpOME ⟶ 12,13-DiHOME
Linoleic acid
Linoleic acid is a doubly unsaturated fatty acid, also known as an omega-6 fatty acid, occurring widely in plant glycosides. In this particular polyunsaturated fatty acid (PUFA), the first double bond is located between the sixth and seventh carbon atom from the methyl end of the fatty acid (n-6). Linoleic acid is an essential fatty acid in human nutrition because it cannot be synthesized by humans. It is used in the biosynthesis of prostaglandins (via arachidonic acid) and cell membranes (From Stedman, 26th ed). Linoleic acid is found to be associated with isovaleric acidemia, which is an inborn error of metabolism. Linoleic acid (LA) is an organic compound with the formula HOOC(CH2)7CH=CHCH2CH=CH(CH2)4CH3. Both alkene groups (−CH=CH−) are cis. It is a fatty acid sometimes denoted 18:2 (n-6) or 18:2 cis-9,12. A linoleate is a salt or ester of this acid.[5] Linoleic acid is a polyunsaturated, omega-6 fatty acid. It is a colorless liquid that is virtually insoluble in water but soluble in many organic solvents.[2] It typically occurs in nature as a triglyceride (ester of glycerin) rather than as a free fatty acid.[6] It is one of two essential fatty acids for humans, who must obtain it through their diet,[7] and the most essential, because the body uses it as a base to make the others. The word "linoleic" derives from Latin linum 'flax', and oleum 'oil', reflecting the fact that it was first isolated from linseed oil.
12,13-DiHOME
12,13-DHOME (CAS: 263399-35-5), also known as 12,13-dihydroxy-9-octadecenoic acid or 12,13-DiHOME, is the epoxide hydrolase metabolite of the leukotoxin 12,13-EpOME. 12,13-EpOME acts as a protoxin, with the corresponding epoxide hydrolase 12,13-DHOME specifically exerting toxicity. Both the EpOME and the DHOME are shown to have neutrophil chemotactic activity. 12,13-DHOME suppress the neutrophil respiratory burst by a mechanism distinct from that of respiratory burst inhibitors such as cyclosporin H or lipoxin A4, which inhibit multiple aspects of neutrophil activation. 12,13-DHOME is a derivative of the linoleic acid diol that has been reported to be toxic in human tissue preparations. 12,13-DHOME is a naturally occurring proliferator-activated receptor (PPAR) gamma2 ligand, which stimulates adipocytes and inhibits osteoblast differentiation (PMID: 17435320, 12021203, 12127265). 12,13-DHOME is the epoxide hydrolase metabolite of the leukotoxin12,13-EpOME. 12,13-EpOMEs act as a protoxin, with the corresponding epoxide hydrolase 12,13-DiHOME specifically exerting toxicity. Both the EpOME and the DiHOME are shown to have neutrophil chemotactic activity. 12,13-DiHOME suppress the neutrophil respiratory burst by a mechanism distinct from that of respiratory burst inhibitors such as cyclosporin H or lipoxin A4,which inhibit multiple aspects of neutrophil activation. 12,13-DHOME is a derivative of linoleic acid diol that have been reported to be toxic in humans tissue preparations. 12,13-DHOME is a naturally occurring proliferator-activated receptor (PPAR) gamma2 ligand, which stimulates adipocytes and inhibits osteoblast differentiation. (PMID: 17435320, 12021203, 12127265) [HMDB]
9-Oxo-ODE
9-OxoODE results from oxidation of the allylic hydroxyl of either 9(S)- or 9(R)-HODE. Rabbit reticulocyte plasma and mitochondrial membranes contain both 9- and 13-oxoODEs, representing about 2\\% of the total linoleate residues in the membranes. Most of these oxidized linoleate residues are esterified to membrane lipids. [HMDB] 9-OxoODE results from oxidation of the allylic hydroxyl of either 9(S)- or 9(R)-HODE. Rabbit reticulocyte plasma and mitochondrial membranes contain both 9- and 13-oxoODEs, representing about 2\\% of the total linoleate residues in the membranes. Most of these oxidized linoleate residues are esterified to membrane lipids.
13-HODE + 9-HODE
13-Hydroxyoctadecadienoic acid (13-HODE) (CAS: 18104-45-5), also known as 13(S)-hydroxy-9Z,11E-octadecadienoic acid or 13(S)-HODE, is the major lipoxygenation product synthesized in the body from linoleic acid. 13-HODE prevents cell adhesion to endothelial cells and can inhibit cancer metastasis. 13-HODE synthesis is enhanced by cyclic AMP. gamma-Linolenic acid, a desaturated metabolite of linoleic acid, causes substantial stimulation of 13-HODE synthesis. A fall in gamma-linolenic acid synthesis with age may be related to the age-related fall in 13-HODE formation (PMID: 9561154). 13-HODE is considered an intermediate in linoleic acid metabolism. It is generated from 13(S)-HPODE via the enzyme lipoxygenase (EC 1.13.11.12). 13-HODE has been shown to be involved in cell proliferation and differentiation in a number of systems. 13-HODE is found to be produced by prostate tumours and cell lines and researchers believe that there is a link between linoleic acid metabolism and the development or progression of prostate cancer (PMID: 9367845).
13-OxoODE
13-oxoODE is produced from 13-HODE by a NAD+-dependent dehydrogenase present in rat colonic mucosa. 13-OxoODE has been shown to stimulate cell proliferation when instilled intrarectally in rats. 13-OxoODE has also been detected in preparations of rabbit reticulocyte plasma and mitochondrial membranes, mostly esterified to phospholipids. Production of 13-oxoODE is putatively linked to the maturation of reticulocytes to erythrocytes through the activity of 15-LO. [HMDB] 13-oxoODE is produced from 13-HODE by a NAD+-dependent dehydrogenase present in rat colonic mucosa. 13-OxoODE has been shown to stimulate cell proliferation when instilled intrarectally in rats. 13-OxoODE has also been detected in preparations of rabbit reticulocyte plasma and mitochondrial membranes, mostly esterified to phospholipids. Production of 13-oxoODE is putatively linked to the maturation of reticulocytes to erythrocytes through the activity of 15-LO.
9(S)-HPODE
9(S)-HPODE is an intermediate in Linoleic acid metabolism(KEGG ID C14827). It is the second to last step in the synthesis of 9-oxoODE, and is converted from linoleate via the enzyme arachidonate 5-lipoxygenase [EC:1.13.11.34]. It is then converted to 9(S)-HODE. D004791 - Enzyme Inhibitors > D016859 - Lipoxygenase Inhibitors D009676 - Noxae > D016877 - Oxidants > D010545 - Peroxides
9,12,13-TriHOME
9,12,13-TriHOME is a trihydroxyoctadecenoic acid metabolite of linoleic acid, one of the major fatty acids found in lipids. Vascular tissue converts various polyunsaturated fatty acids to monohydroxy and trihydroxy metabolites derived from hydroperoxides which may be involved in regulating prostaglandin synthesis. The absolute amounts of 9,12,13-TriHOME varies considerably from one species to another. There are several possible mechanisms for the formation of esterified oxygenated polyunsaturated fatty acids: oxygenated and then incorporated into lipids, not well incorporated into either vascular endothelial or smooth muscle cells, or could accumulated in lipids either due to autoxidation in vivo or to the action of an enzyme similar to Iipoxygenase. (PMID: 3997883, 6414520) [HMDB] 9,12,13-TriHOME is a trihydroxyoctadecenoic acid metabolite of linoleic acid, one of the major fatty acids found in lipids. Vascular tissue converts various polyunsaturated fatty acids to monohydroxy and trihydroxy metabolites derived from hydroperoxides which may be involved in regulating prostaglandin synthesis. The absolute amounts of 9,12,13-TriHOME varies considerably from one species to another. There are several possible mechanisms for the formation of esterified oxygenated polyunsaturated fatty acids: oxygenated and then incorporated into lipids, not well incorporated into either vascular endothelial or smooth muscle cells, or could accumulated in lipids either due to autoxidation in vivo or to the action of an enzyme similar to Iipoxygenase. (PMID: 3997883, 6414520). Pinellic acid is a trihydroxyoctadecenoic acid with hydroxy groups at positions C-9, -12, and 13, and an E (cis) double bond at position 10. It has a role as an adjuvant and an anti-inflammatory agent. It is functionally related to a 13(S)-HPODE. Pinellic acid is a natural product found in Pinellia ternata, Bupleurum falcatum, and other organisms with data available. A trihydroxyoctadecenoic acid with hydroxy groups at positions C-9, -12, and 13, and an E (cis) double bond at position 10.
9,10,13-TriHOME
9,10,13-TriHOME is a trihydroxyoctadecenoic acid metabolite of linoleic acid, one of the major fatty acids found in lipids. Vascular tissue converts various polyunsaturated fatty acids to monohydroxy and trihydroxy metabolites derived from hydroperoxides which may be involved in regulating prostaglandin synthesis. [HMDB] 9,10,13-TriHOME is a trihydroxyoctadecenoic acid metabolite of linoleic acid, one of the major fatty acids found in lipids. Vascular tissue converts various polyunsaturated fatty acids to monohydroxy and trihydroxy metabolites derived from hydroperoxides which may be involved in regulating prostaglandin synthesis.
12,13-EpOME
12,13-EpOME is the 12,13-cis epoxide of linoleic acid, generated by neutrophils during the oxidative burst. The toxicity and biosynthesis of 12,13-EpOME has not been well differentiated from 9,10-EpOME, but has been presumed to be essentially the same.P [HMDB]. Vernolic acid is found in rice. 12,13-EpOME is the 12,13-cis epoxide of linoleic acid, generated by neutrophils during the oxidative burst. The toxicity and biosynthesis of 12,13-EpOME has not been well differentiated from 9,10-EpOME, but has been presumed to be essentially the same.P.
(10E,12Z)-9-HODE
(10E,12Z)-9-HODE, also known as 9-Hydroxy-10E,12Z-octadecadienoic acid or 9-Hydroxylinoleic acid, is classified as a lineolic acid or a Lineolic acid derivative. Lineolic acids are derivatives of lineolic acid. Lineolic acid is a polyunsaturated omega-6 18 carbon long fatty acid, with two CC double bonds at the 9- and 12-positions. (10E,12Z)-9-HODE is considered to be practically insoluble (in water) and acidic. (10E,12Z)-9-HODE is an octadecanoid lipid molecule
13-HpODE
An HPODE (hydroperoxyoctadecadienoic acid) in which the double bonds are at positions 9 and 11 (E and Z geometry, respectively) and the hydroperoxy group is at position 13. D009676 - Noxae > D016877 - Oxidants > D010545 - Peroxides
