Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P80404 (GABA transaminase)
 786 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Brain capillaries (microvessels) were isolated from rabbit brain. Morphological characterization revealed relatively pure fractions of microvessels consisting of the capillary endothelium, the basal membrane, and the pericyte. These fractions of brain capillaries show acetylcholinesterase (AChE) and monoamine oxidase (MAO) activity, but lack catechol-O-methyltransferase and GABA transaminase activity. Isolated brain capillaries together with samples of the brain parenchyma and serum were used to study the role of AChE present in the brain capillary wall in soman intoxication. The results showed this AChE to be less sensitive to soman inhibition than AChE of brain parenchyma. Serum and brain AChE recovered to some extent in soman-intoxicated rabbits given HI-6, whereas AChE present in the microvessel was even further inhibited. It is suggested that soman-induced vasospasm in rabbit brain may explain both the inaccessibility of capillary AChE to soman and also the unfavorable effect of HI-6 on this enzyme.
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PMID:Soman intoxication and the blood-brain barrier. 409 83

The activities of monoamine oxidase (MAO), catechol-O-methyltransferase (COMT) and gamma-aminobutyric acid transaminase (GABA-T) were measured in primary cultures from newborn rat cultivated from 6 different brain regions. These primary cultures contained mostly astroglial cells, evaluated by the presence of the glial fibrillary acidic protein (GFAp, alpha-albumin) and the S-100 protein. The enzyme activities in the corresponding brain area from adult rat were also quantified. MAO activities were on the same level in 14-day old cultures and in adult rat brain homogenates, with significantly lower values in brain stem as compared to the other brain regions examined. COMT activities were on a higher level in the cultures than in adult rat brain homogenates. Astroglial cells from hippocampus were found to have the highest and those from brain stem the lowest COMT-activities. GABA-T activities were lower in the cultures than in adult rat homogenates. No significant differences were seen in the various astroglial cultures. Accumulation of [3H]dopamine and [3H]gamma-aminobutyric acid (GABA) visualized by autoradiography showed only a slight uptake of dopamine in comparison with the uptake of GABA. It is concluded that astroglial cells in culture have enzymatic properties similar to those of astroglial cells in different brain regions of adult rat brain. Studies are in progress to evaluate if the regional heterogeneity observed among cultivated astroglial cells is affected by in vivo differentiation until cultivation and/or time in culture.
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PMID:Enzyme activities of monoamine oxidase, catechol-O-methyltransferase and gamma-aminobutyric acid transaminase in primary astroglial cultures and adult rat brain from different brain regions. 671 30