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Page 1 de 157 résultats
A novel catechol-O-methyltransferase variant associated with human disc degeneration.
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BACKGROUND
Disc degeneration and its associated low back pain are a major health care concern causing disability with a prominent role in this country's medical, social and economic structure. Low back pain is devastating and influences the quality of life for millions. Low back pain lifetime
The high-activity Val allele of the catechol-O-methyltransferase gene predicts greater cognitive deterioration in patients with psychosis.
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The objective of this study was to examine whether the functional genetic polymorphism Val158Met in the catechol-O-methyltransferase (COMT) gene influences cognitive deterioration in a sample of patients with psychosis under treatment with atypical antipsychotics. Eighty-seven patients with
Role of catechol autooxidation in the degeneration of dopamine neurons.
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Cloning and expression of thermophilic catechol 1,2-dioxygenase gene (catA) from Streptomyces setonii.
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Streptomyces setonii (ATCC 39116) degrades various single aromatic compounds such as phenol or benzoate via an ortho-cleavage pathway using catechol 1,2-dioxygenase (C12O). A PCR using degenerate primers based on the conserved regions of known C12O-encoding genes amplified a 0.45-kbp DNA fragment
The spin trap reagent PBN attenuates degeneration of 5-HT neurones in rat brain induced by p-chloroamphetamine but not fenfluramine.
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Dark Agouti rats injected with either p-chloroamphetamine (PCA; 2.5 mg/kg i.p.) or fenfluramine (15 mg/kg i.p.) had substantial decreases (approximately 50%) in the concentration of 5-HT and 5-HIAA and binding of [3H]paroxetine in the cerebral cortex 7 days later. This indicates that both compounds
Cytosolic catechols inhibit alpha-synuclein aggregation and facilitate the formation of intracellular soluble oligomeric intermediates.
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Aberrant aggregation of alpha-synuclein (alpha-syn) to form fibrils and insoluble aggregates has been implicated in the pathogenic processes of many neurodegenerative diseases. Despite the dramatic effects of dopamine in inhibiting the formation of alpha-syn fibrils by stabilization of oligomeric
[A comparative study of efficacy of dopamine receptors agonists and catechol-O-methyltransferase in the treatment of late stages of Parkinson's disease].
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Dopamine receptors agonists and catechol-O-methyltransferase (COMT) inhibitors are the novel classes of the drugs for Parkinson's disease (PD) treatment in both early and late stages. In the latter one, there is an increase of substantia nigra neurons degeneration, striatum denervation, changes of
The activities of brain dopamine-beta-hydroxylase and catechol-O-methyl transferase in schizophrenics and controls.
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It has been suggested that deterioration of central noradrenergic pathways may be responsible for the production of certain schizophrenic symptoms, and that such a degeneration might be reflected in lowered dopamine-beta-hydroxylase (DBH) activity in the brains of schizophrenics. The present study
Applicability of the functional gene catechol 1,2-dioxygenase as a biomarker in the detection of BTEX-degrading Rhodococcus species.
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OBJECTIVE
Catechol 1,2-dioxygenase is a key enzyme in the degradation of monoaromatic pollutants. The detection of this gene is in focus today but recently designed degenerate primers are not always suitable. Rhodococcus species are important members of the bacterial community involved in the
Molecular analysis of the catechol-degrading bacterial community in a coal wasteland heavily contaminated with PAHs.
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A PCR-based molecular tool was developed to estimate the diversity of the catechol-degrading bacterial community in a coal wasteland heavily contaminated with PAHS. A degenerate primer pair specific to catA sequences was designed by multiple alignment of known sequences coding a key intermediate of
Distinct cellular localization of membrane-bound and soluble forms of catechol-O-methyltransferase in brain.
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The cellular localization of the two forms of catechol-O-methyltransferase (COMT) was investigated by measuring their activities in rat striatum following unilateral stereotaxic injection of kainic acid, which causes degeneration of striatal neurons followed by proliferation of astroglial cells.
Catechol-o-methyltransferase and blood pressure in humans.
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BACKGROUND
Whether catechol-O-methyltransferase (COMT), the enzyme that metabolizes extraneuronal norepinephrine, contributes to blood pressure regulation in humans is unknown.
RESULTS
We studied incremental doses of the COMT inhibitor entacapone, the sympathetic stimulant yohimbine, and placebo in
Glutathione reductase activity in skin exposed to 4-tertiary butyl catechol.
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The effect of 4-tertiary butyl catechol (TBC), a potent depigmenting chemical, on glutathione reductase (GR) in pigmented ear skin of hairless mice was investigated. Three topical applications of TBC, which cause neither skin color changes nor melanocyte degeneration, induced an increase in enzyme
In vivo evidence for free radical involvement in the degeneration of rat brain 5-HT following administration of MDMA ('ecstasy') and p-chloroamphetamine but not the degeneration following fenfluramine.
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1. Administration of 3,4-methylenedioxymethamphetamine (MDMA or 'ecstasy') to several species results in a long lasting neurotoxic degeneration of 5-hydroxytryptaminergic neurones in several regions of the brain. We have now investigated whether this degeneration is likely to be the result of free
PCR isolation of catechol 2,3-dioxygenase gene fragments from environmental samples and their assembly into functional genes.
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A method was developed to isolate central segments of catechol 2, 3-dioxygenase (C23O) genes from environmental samples and to insert these C23O gene segments into nahH (the structural gene for C23O encoded by catabolic plasmid NAH7) by replacing the corresponding nahH sequence with the isolated
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