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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 71 (1988), S. 450-454 
    ISSN: 1432-1106
    Keywords: Binding ; 3H-acetylcholine ; 3H-nicotine ; Muscarinic antagonists ; Tissue culture ; Brain stem ; Spinal cord
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The cellular localization of cholinergic binding sites was studied in organotypic cultures of rat spinal cord and brain stem by means of autoradiography with radiolabelled muscarinic and nicotinic agonists and antagonists. Many astrocytes in both types of cultures showed intense labelling by 3H-acetylcholine in the presence of nicotine and the muscarinic antagonists 3H-pirenzepine, 3H-quinuclidinyl benzilate and 3H-propylbenzilcholine mustard. Incubation of the cultures with 3H-nicotine or 3H-acetylcholine in the presence of atropine also caused labelling of astrocytes. In addition to glial cells, many neurones showed binding of muscarinic and nicotinic agonists and antagonists. From our results it is suggested that astrocytes, besides neurones, possess both muscarinic and nicotinic 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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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 38 (1980), S. 241-243 
    ISSN: 1432-1106
    Keywords: Binding ; 3H-GABA ; 3H-muscimol ; Cerebellum ; Tissue culture ; Autoradiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Autoradiographic studies were conducted on the binding of3H-GABA and3H-muscimol in cultures of rat cerebellum. Binding sites for both substances were observed on many cerebellar neurones, such as Purkinje cells and interneurones, but not on glial cells. Binding of3H-GABA and3H-muscimol was inhibited by unlabelled GABA and by the GABA antagonist bicuculline.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1106
    Keywords: Binding ; Autoradiography ; 3H-serotonin ; 3H-ketanserin ; Tissue culture ; Brain stem ; Spinal cord
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary By means of lightmicroscopic autoradiography we have studied the cellular localization of binding sites for 3H-serotonin and 3H-ketanserin in organotypic cultures of rat brain stem and spinal cord. In both types of cultures, a relatively great number of neurones revealed binding sites for 3H-serotonin which predominantly labels S1-receptors. 3H-ketanserin, an S2-antagonist was also bound to many neurones although to a lesser extent than 3H-serotonin. Binding sites for both radio-ligands were also observed on astrocytes. These findings together with electrophysiological investigations indicate that astrocytes possess serotonin receptors.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 80 (1990), S. 621-625 
    ISSN: 1432-1106
    Keywords: Binding ; GABAA-sites ; GABAB-sites ; Tissue culture ; Cerebellum ; Brain stem ; Spinal cord ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The cellular localization of GABA-binding sites was studied in explant cultures of rat cerebellum, brain stem and spinal cord by means of autoradiography. Labelling of GABAB-sites was done with 3H(-)baclofen or 3H-GABA in presence of unlabelled bicuculline. Binding sites for these radio-ligands were found on many neurones and on a large number of astrocytes. Labelling of glial cells was usually weaker than that of neurones. Combining autoradiography with staining with anti-glial fibrillary acidic protein (GFAP) revealed that the glial cells labelled with 3H-baclofen or 3H-GABA were GFAP-positive. In contrast, when GABAA-sites were localized using 3H-GABA in presence of unlabelled baclofen, the GABAA-agonists 3H-muscimol and 3H-THIP, or the antagonist 3H-(+)-bicuculline, binding only occurred to neurones but not to astrocytes. Immunohistochemical investigations with the monoclonal antibody (bd-17) against the GABAA/benzodiazepine/chloride channel complex revealed that neurones were specifically stained whereas glial cells were immunonegative. From our observations it is suggested that astrocytes possess GABAB-receptors but there is little evidence for the existence of GABAA-sites on glial elements.
    Type of Medium: Electronic Resource
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