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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 65 (1987), S. 482-485 
    ISSN: 1432-1106
    Keywords: Electrophysiology ; Dopamine ; Serotonin ; Astrocytes ; Tissue cultures ; Spinal cord ; Striatum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The actions of dopamine, apomorphine and serotonin on the membrane potential of cultured astrocytes from rat spinal cord and striatum were examined. All three compounds caused a hyperpolarization of the majority of astrocytes tested. A small number of cells was depolarized and on a relatively large number of cells the amines had no effect. The dopamine antagonists cis-flupenthixol and domperidone reversibly blocked the effects of dopamine whereas the action of serotonin was antagonized by ketanserin. It is therefore concluded that the effects of both amines are due to activation of specific dopamine and serotonin receptors, respectively. Our electrophysiological data together with autoradiographic binding studies provide evidence that astrocytes possess receptors for dopamine and serotonin in addition to adrenoceptors and histamine receptors.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1106
    Keywords: Immunohistochemistry ; Monoclonal antibody ; GABAA-receptors ; Tissue cultures ; Spinal cord ; Brain stem ; Cerebellum ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Explant cultures of rat spinal cord, brain stem and cerebellum were used to visualize GABAA-receptors by means of immunohistochemistry. For these studies we have incubated the cultures with the monoclonal antibody bd 17 against the β-subunit of the GABAA/benzodiazepine/chloride channel complex. In spinal cord cultures, many interneurones were immunoreactive whereas only a small number of large neurones, probably motoneurones was specifically stained. In brain stem cultures, groups of large and medium-sized neurones showed immunoreactivity. In cultures of cerebellum, a great number of neurones was specifically stained. Granule cells showed the strongest immunoreactivity whereas other neurones, presumably Purkinje cells and interneurones, were only moderately stained. The immunoreactivity was mainly confined to the cell bodies of the neurones while their processes were only weakly or not stained. In contrast to neurones, no immunoreactivity could be detected on astrocytes.
    Type of Medium: Electronic Resource
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