نتایج جستجو برای: comt
تعداد نتایج: 1925 فیلتر نتایج به سال:
Introduction COMT expression was reported to be associated with the recurrence of prostate cancer. Furthermore, it has been shown that rs165599 SNP in 3’UTR affects interaction between miR-138 and COMT, while another polymorphism (rs4680) located gene also its expression. Here, we explored combined effect rs4680 . Material methods Kaplan-Meier analysis performed analyze PSA-progression-free sur...
BACKGROUND Catechol-O-methyltransferase (COMT) metabolizes dopamine. The COMT Val(158)Met polymorphism influences its activity, and multiple neural correlates of this genotype on dopaminergic phenotypes, especially working memory, have been reported. COMT activity can also be regulated pharmacologically by COMT inhibitors. The inverted-U relationship between cortical dopamine signaling and work...
Catechol-O-methyltransferase (COMT) has two isoforms: soluble (S-COMT), which resides in the cytoplasm, and membrane-bound (MB-MT), anchored to intracellular membranes. COMT is involved in the O-methylation of L-DOPA, dopamine and other catechols. The exact role of MB-COMT is still mostly unclear. We wanted to create a novel genetically modified mouse model that specifically lacks MB-COMT activ...
Catechol-O-methyltransferase (COMT) plays an important role in estrogen-induced cancers because COMT inactivates catechol estrogens that have cancer-promoting activities. Two promoters control the expression of human COMT isoforms: membrane-bound COMT (MB-COMT) and soluble COMT (S-COMT). We hypothesize that inactivation of MB-COMT and S-COMT is important in understanding the pathogenesis of end...
Catechol-O-methyltransferase (COMT) activity depends on gender, age and physiological status suggesting that estrogen may regulate COMT activity. In fact, estrogens down-regulate the function of COMT promoters in cell cultures. On the other hand, COMT may play an important role in estrogen-induced cancers due to its ability to inactivate estrogen metabolites and thereby lowering the levels of t...
enzyme which inactivates the released catecholamines from nerve endings by methylating their catechol moieties using S-adenosyl-L-methionine (SAMe) as a methyl donor. COMT is found in most mammalian tissues, with highest activity in the liver and the kidney. There are two COMT isoforms: in the cytoplasm as soluble COMT (S-COMT) and in association with membranes as membrane-bound COMT (MB-COMT)....
Sex steroids are of profound importance for several physiological processes including reproduction, growth, and maintenance of skeletal integrity. Serum levels of sex steroids are associated with bone mineral density (BMD) and have been shown to be predictive of fracture risk in older people. Sex steroid levels in serum, and also BMD and fracture risk, are under genetic control. Catechol-O-meth...
traumatic brain injury (tbi) is one of the serious neurodisorders commonly caused by car accidents and sports. preventive measures are highly recommended to reduce the risk and number of tbi cases. after tbi, the primary injury to the brain initiates a secondary injury process that spreads via multiple molecular mechanisms in the pathogenesis of tbi. many studies in animals using cdna microarra...
BACKGROUND Catechol-O-methyltransferase (COMT) is the principal enzyme in the conjugation pathway for hydroxylated estrogens. We hypothesize that blood 17beta-estradiol (E(2)) and estrone (E(1)) levels in postmenopausal women receiving an oral E(2) preparation are dependent on the enzyme activity of COMT. METHODS To determine the influence of this enzyme on E(2) serum levels three groups of 1...
Catechol-O-methyltransferase (COMT) metabolizes catecholaminergic neurotransmitters. Numerous studies have linked COMT to pivotal brain functions such as mood, cognition, response to stress, and pain. Both nociception and risk of clinical pain have been associated with COMT genetic variants, and this association was shown to be mediated through adrenergic pathways. Here, we show that associatio...
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