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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Neurochemical research 25 (2000), S. 211-215 
    ISSN: 1573-6903
    Keywords: Glutamate ; guanine nucleotides ; antinoception ; naturally-occurring compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Glutamate is to be considered a nociceptive neurotransmitter and glutamatergic antagonists present antinoceptive activity. In this study we investigated the effects of the naturally occurring antinociceptive compounds rutin, geraniin and quercetine extracted from Phyllanthus, as well as the diterpene jatrophone, extracted from Jatropha elliptica on the binding of [3H]glutamate and [3H]GMP-PNP [a GTP analogue which binds to extracellular site(s), modulating the glutamatergic transmission] in rat brain membrane. Jatrophone inhibited [3H]glutamate binding and geraniin inhibited [3H]GMP-PNP binding. Quercetine inhibited the binding of both ligands. These results may indicate a neurochemical parameter possibly related to the antinoceptive activity of these natural compounds.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular neurobiology 9 (1989), S. 469-473 
    ISSN: 1573-6830
    Keywords: rat vas deferens ; field stimulation ; chronic imipramine treatment ; γ-aminobutyric acid (GABA) ; clonidine ; isoproterenol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. Chronic (10 mg/kg, i.p., once daily for 14 days) but not acute (10 mg/kg, i.p., 24 hr) administration of imipramine resulted in a decrease in both the responsiveness and the sensitivity of the contractions of the isolated rat vas deferens elicited by field stimulation to GABA and (−)-baclofen. 2. In contrast, clonidine and isoproterenol effects were not altered by either treatment. 3. This study shows for the first time that GABA action in the peripheral nervous system is altered by chronic treatment with antidepressants, possibly by inducing changes in a postreceptor element.
    Type of Medium: Electronic Resource
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