Gene Association: GABRQ
UniProt Search:
GABRQ (PROTEIN_CODING)
Function Description: gamma-aminobutyric acid type A receptor subunit theta
found 12 associated metabolites with current gene based on the text mining result from the pubmed database.
15(S)-HPETE
15(S)-hydroperoxyeicosatetraenoic acid (15(S)-HPETE) is the corresponding hydroperoxide of 15(S)-HETE and undergoes homolytic decomposition to the DNA-reactive bifunctional electrophile 4-oxo-2(E)-nonenal, a precursor of heptanone-etheno-2-deoxyguanosine. Reactive oxygen species convert the omega-6 polyunsaturated fatty acid arachidonic acid into (15-HPETE); vitamin C mediates 15(S)-HPETE decomposition. 15(S)-HPETE initiates apoptosis in vascular smooth muscle cells. 15(S)-HPETE is a lipoxygenase metabolite that affects the expression of cell adhesion molecules (CAMs) involved in the adhesion of leukocytes and/or the accumulation of leukocytes in the vascular endothelium, these being the initial events in endothelial cell injury. 15(S)-HPETE induces a loss of cardiomyocytes membrane integrity. 15-(S)HPETE is a hydroperoxide that enhances the activity of the enzymes lipoxygenase [EC 1.13.11.12] and Na+, K+-ATPase [EC 3.6.3.9] of brain microvessels. Lipoxygenase(s) and Na+-K+-ATPase of brain microvessels may play a significant role in the occurrence of ischemic brain edema. (PMID: 15964853, 15723435, 8655602, 8595608, 2662983). D002317 - Cardiovascular Agents > D014662 - Vasoconstrictor Agents D004791 - Enzyme Inhibitors > D016859 - Lipoxygenase Inhibitors D009676 - Noxae > D016877 - Oxidants > D010545 - Peroxides
15H-11,12-EETA
15H-11,12-EETA is an epoxyeicosatrienoic acid (EET). The role of EETs in regulation of the cerebral circulation has become more important, since it was realized that EETs are produced in another specialized cell type of the brain, the astrocytes. It has become evident that EETs released from astrocytes may mediate cerebral functional hyperemia. Molecular and pharmacological evidence hve shown that neurotransmitter release and spillover onto astrocytes can generate EETs. Since these EETs may reach the vasculature via astrocyte foot-processes, they have the same potential as their endothelial counterparts to hyperpolarize and dilate cerebral vessels. P450 enzymes contain heme in their catalytic domain and nitric oxide (NO) appears to bind to these heme moieties and block formation of P450 products, including EETs. Thus, there appears to be crosstalk between P450 enzymes and NO/NO synthase. The role of fatty acid metabolites and cerebral blood flow becomes even more complex in light of data demonstrating that cyclooxygenase products can act as substrates for P450 enzymes. (PMID: 17494091, 17468203, 17434916, 17406062, 17361113, 15581597, 11413051, 10519554, 11893556) [HMDB] 15H-11,12-EETA is an epoxyeicosatrienoic acid (EET). The role of EETs in regulation of the cerebral circulation has become more important, since it was realized that EETs are produced in another specialized cell type of the brain, the astrocytes. It has become evident that EETs released from astrocytes may mediate cerebral functional hyperemia. Molecular and pharmacological evidence hve shown that neurotransmitter release and spillover onto astrocytes can generate EETs. Since these EETs may reach the vasculature via astrocyte foot-processes, they have the same potential as their endothelial counterparts to hyperpolarize and dilate cerebral vessels. P450 enzymes contain heme in their catalytic domain and nitric oxide (NO) appears to bind to these heme moieties and block formation of P450 products, including EETs. Thus, there appears to be crosstalk between P450 enzymes and NO/NO synthase. The role of fatty acid metabolites and cerebral blood flow becomes even more complex in light of data demonstrating that cyclooxygenase products can act as substrates for P450 enzymes. (PMID: 17494091, 17468203, 17434916, 17406062, 17361113, 15581597, 11413051, 10519554, 11893556).
11,12,15-THETA
11,12,15-trihydroxyeicosatrienoic acid (11,12,15-THETA) is a metabolite of the 15-lipoxygenase (15-LO) pathway of arachidonic acid (AA). 11,12,15-THETA is an endothelium-derived relaxing factor. Acetylcholine stimulates AA release from membrane phospholipids of vascular endothelial cells (ECs). AA is released from phosphatidylcholine (PC) and phosphatidylethanolamine (PE) by phospholipase A2 (PLA2), or from phosphatidylinositol (PI) by phospholipase C (PLC) pathway. The diacylglycerol (DAG) lipase can convert DAG into 2-arachidonoylglycerol from which free AA can be released by monoacylglycerol (MAG) lipase or fatty acid amidohydrolase (FAAH). 11,12,15-THETA mediates the acetylcholine-induced vaso-relaxation, via activation of the K+ channels to hyperpolarize the smooth muscle membrane and induce relaxation. (PMID: 12907422, 16024567, 15388505, 14622984) [HMDB] 11,12,15-trihydroxyeicosatrienoic acid (11,12,15-THETA) is a metabolite of the 15-lipoxygenase (15-LO) pathway of arachidonic acid (AA). 11,12,15-THETA is an endothelium-derived relaxing factor. Acetylcholine stimulates AA release from membrane phospholipids of vascular endothelial cells (ECs). AA is released from phosphatidylcholine (PC) and phosphatidylethanolamine (PE) by phospholipase A2 (PLA2), or from phosphatidylinositol (PI) by phospholipase C (PLC) pathway. The diacylglycerol (DAG) lipase can convert DAG into 2-arachidonoylglycerol from which free AA can be released by monoacylglycerol (MAG) lipase or fatty acid amidohydrolase (FAAH). 11,12,15-THETA mediates the acetylcholine-induced vaso-relaxation, via activation of the K+ channels to hyperpolarize the smooth muscle membrane and induce relaxation. (PMID: 12907422, 16024567, 15388505, 14622984).
11H-14,15-EETA
11H-14,15-EETA is an epoxyeicosatrienoic acid. Epoxyeicosatrienoic acids (EpETrEs) have been reported recently having vasodilatory effects and a role of P-450-dependent arachidonic acid monooxygenase metabolites is suggested in vasoregulation. The physiological role of this compound has not been totally established, although in other tissues EpETrEs are mainly involved in hormone production and in the vascular and renal systems. Some studies have implicated epoxygenase metabolites of arachidonic acid in the control of steroidogenesis in luteinised granulosa cells. (PMID: 12749593, 12361727, 1650001) [HMDB] 11H-14,15-EETA is an epoxyeicosatrienoic acid. Epoxyeicosatrienoic acids (EpETrEs) have been reported recently having vasodilatory effects and a role of P-450-dependent arachidonic acid monooxygenase metabolites is suggested in vasoregulation. The physiological role of this compound has not been totally established, although in other tissues EpETrEs are mainly involved in hormone production and in the vascular and renal systems. Some studies have implicated epoxygenase metabolites of arachidonic acid in the control of steroidogenesis in luteinised granulosa cells. (PMID: 12749593, 12361727, 1650001).
11,14,15-THETA
11,14,15-trihydroxyeicosatrienoic acid (11,14,15-THETA) is a metabolite of the 15-lipoxygenase (15-LO) pathway of arachidonic acid (AA). Increased amounts of 11,14,15-THETA are synthesized in subacute hypoxia. Prolonged exposure to reduced PO2 activates 15-LO in small pulmonary arteries (PA); activation of 15-LO is associated with translocation of the enzyme from the cytosol to membrane. 11,14,15-THETA is an endothelium-derived relaxing factor. (PMID: 12690037, 9812980, 15388505, 14622984) [HMDB] 11,14,15-trihydroxyeicosatrienoic acid (11,14,15-THETA) is a metabolite of the 15-lipoxygenase (15-LO) pathway of arachidonic acid (AA). Increased amounts of 11,14,15-THETA are synthesized in subacute hypoxia. Prolonged exposure to reduced PO2 activates 15-LO in small pulmonary arteries (PA); activation of 15-LO is associated with translocation of the enzyme from the cytosol to membrane. 11,14,15-THETA is an endothelium-derived relaxing factor. (PMID: 12690037, 9812980, 15388505, 14622984).
15(S)-HPETE
D002317 - Cardiovascular Agents > D014662 - Vasoconstrictor Agents D004791 - Enzyme Inhibitors > D016859 - Lipoxygenase Inhibitors D009676 - Noxae > D016877 - Oxidants > D010545 - Peroxides The (S)-enantiomer of 15-HPETE. 15(S)-hydroperoxyeicosatetraenoic acid (15(S)-HPETE) is the corresponding hydroperoxide of 15(S)-HETE and undergoes homolytic decomposition to the DNA-reactive bifunctional electrophile 4-oxo-2(E)-nonenal, a precursor of heptanone-etheno-2-deoxyguanosine. Reactive oxygen species convert the omega-6 polyunsaturated fatty acid arachidonic acid into (15-HPETE); vitamin C mediates 15(S)-HPETE decomposition. 15(S)-HPETE initiates apoptosis in vascular smooth muscle cells. 15(S)-HPETE is a lipoxygenase metabolite that affects the expression of cell adhesion molecules (CAMs) involved in the adhesion of leukocytes and/or the accumulation of leukocytes in the vascular endothelium, these being the initial events in endothelial cell injury. 15(S)-HPETE induces a loss of cardiomyocytes membrane integrity. 15-(S)HPETE is a hydroperoxide that enhances the activity of the enzymes lipoxygenase [EC 1.13.11.12] and Na+, K+-ATPase [EC 3.6.3.9] of brain microvessels. Lipoxygenase(s) and Na+-K+-ATPase of brain microvessels may play a significant role in the occurrence of ischemic brain edema. (PMID: 15964853, 15723435, 8655602, 8595608, 2662983) [HMDB]
