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  • 1
    Electronic Resource
    Electronic Resource
    Morphological evidence for a direct neuroendocrine GABAergic control of the anterior pituitary in teleosts (1987)
    Springer
    Cellular and molecular life sciences 43 (1987), S. 300-302 
    Details
    ISSN: 1420-9071
    Keywords: GABA ; immunocytochemistry ; anterior pituitary ; neuroendocrine control ; teleost
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The anterior pituitary of teleosts is unique among vertebrates in receiving a direct innervation which represents the morphological support of the neuroendocrine control of pars distalis functions. The participation of GABAergic fibers in this innervation was studied by means of immunocytochemistry at the light and electron microscopic levels, using antibodies against GABA. Immunoreactive fibers, characterized by the presence of small clear and dense cored vesicles, were detected in all parts of the gland. Immunopositive terminals were found in close, sometimes synaptic-like, contact with most glandular cell types in the anterior lobe. The data strongly suggest that in teleosts, as in mammals, GABA is involved in the neuroendocrine control of anterior pituitary functions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01945558
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Simultaneous immunogold labeling of GABAergic terminals and vasopressin-containing neurons in the rat paraventricular nucleus (1989)
    Springer
    Cell & tissue research 255 (1989), S. 77-80 
    Details
    ISSN: 1432-0878
    Keywords: Paraventricular nucleus ; GABA ; Vasopressin ; Double-immunogold labeling ; Rat (Wistar)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The GABAergic innervation of vasopressin-containing cells in the magnocellular part of the paraventricular nucleus was studied at the electron-microscope level using antibodies against GABA and vasopressin. The detection of both GABA and vasopressin on the same ultrathin section, performed with a double-labeling immunogold method, revealed GABAergic terminals in symmetrical synaptic contact with vasopressin-containing neurons. These GABAergic terminals displayed mitochondria, clear synaptic vesicles and varying numbers of electron-dense vesicles. Vasopressin-immunoreactivity was associated with neurosecretory granules, whereas GABA-immunoreactivity was found above mitochondria, clear synaptic vesicles and some electron-dense vesicles. This study, demonstrating the extensive participation of GABA in the innervation of magnocellular vasopressin-secreting neurons, suggests that this inhibitory neurotransmitter regulates vasopressin secretion at the level of the paraventricular nucleus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229068
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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