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  • 1
    Electronic Resource
    Electronic Resource
    Immunocytochemical localization of GnRH (gonadotropin releasing hormone) systems in the brain of a marine teleost fish, the sole (1985)
    Springer
    Cellular and molecular life sciences 41 (1985), S. 1574-1576 
    Details
    ISSN: 1420-9071
    Keywords: GnRH ; immunocytochemistry ; brain ; fish ; reproduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The GnRH system was studied in the brain of the sole by immunocytochemistry (peroxidase-antiperoxidase method) (PAP) using antibodies to synthetic salmon GnRH (s-GnRH). Two centers containing immunoreactive cell bodies were observed in the forebrain, one located at the junction between the olfactory bulbs and the telencephalon and the other in the preoptic area. Numerous immunoreactive fibers were found, especially in the telencephalon, hypothalamus, pituitary, optic tectum and retina.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01964814
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  • 2
    Electronic Resource
    Electronic Resource
    Studies on the mode of action of neuropeptide Y (NPY) on maturational gonadotropin (GtH) secretion from perifused rainbow trout pituitary glands (1990)
    Springer
    Fish physiology and biochemistry 8 (1990), S. 339-346 
    Details
    ISSN: 1573-5168
    Keywords: neuropeptide Y ; GnRH ; gonadotropin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The action of neuropeptide Y (NPY) and gonadotropin releasing hormone (s-GnRH) have been compared on the release of gonadotropin (GtH) by perifused rainbow trout pituitary glands sampled from freshly ovulated female rainbow trout. We have already demonstrated that NPY stimulated the secretion of GtH in vitro. The pituitary responses to s-GnRH and NPY were similar either after repeated 10 min infusions or a one hour prolonged application. In both cases, after the first application, the pituitary did not responded to subsequent secretagogues stimulations, and appeared to be desensitized. The stimulatory action of s-GnRH was partly inhibited (60%) by LH-RH antagonist (DpGlu1, DPhe2, DTrp3–6) LH-RH, which completely inhibited the response to NPY in perifused pituitary glands sampled from freshly ovulated females, but did not modify the response of pituitaries taken from vitellogenic animals in which NPY induced a transient inhibition of the GtH secretion. These results may indicate that the mode of action of NPY would differ between vitellogenic and matured animals. NPY also stimulated the GtH secretion from perifused pituitary dispersed cells prepared from pituitaries taken from freshly ovulated rainbow trout, indicating that NPY may act directly on the pituitary gonadotropic cells to stimulate GtH secretion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00003429
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    Paper (German National Licenses)
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