Immunoreactive Gonadotropin-Releasing Hormone (Ir-GnRH) in the Carp Brain
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منابع مشابه
Photoperiod-independent changes in immunoreactive brain gonadotropin-releasing hormone (GnRH) in a free-living, tropical bird.
Timing of seasonal reproduction in high latitude vertebrates is generally regulated by photoperiodic cues. Increasing day length in the spring is associated with changes in the brain that are responsible for mediating reproductive activities. A primary example of this is the increased content of gonadotropin-releasing hormone (GnRH) in the preoptic area of the hypothalamus in birds as they ente...
متن کاملGonadotropin-releasing hormone (GnRH)-immunoreactive terminal nerve cells have intrinsic rhythmicity and project widely in the brain.
Modulation of ionic channel properties and synaptic functions by neurotransmitters and hormones is called neuro-modulation and may be the basis for many long-lasting changes in animal behavior, for example, changes in the arousal or motivational states. We have previously shown in a teleost, the dwarf gourami, that the terminal nerve (TN) cells are a major component of the gonadotropin-releasin...
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Gonadotropin-releasing hormone (GnRH) regulates reproduction. The human GnRH receptor lacks a cytoplasmic carboxy-terminal tail but has amino acid sequence motifs characteristic of rhodopsin-like, class A, G protein-coupled receptors (GPCRs). This review will consider how recent descriptions of X-ray crystallographic structures of GPCRs in inactive and active conformations may contribute to und...
متن کاملDistinct sequence of gonadotropin-releasing hormone (GnRH) in dogfish brain provides insight into GnRH evolution.
In vertebrates, gonadotropin-releasing hormone (GnRH) belongs to a family of decapeptides characterized by the conservation of residues 1, 2, 4, 9, and 10. In the jawed vertebrates only positions 5, 7, and 8 in the GnRH molecules vary. We have now purified two forms of GnRH from the brains of spiny dogfish (Squalus acanthias) by using reverse-phase high-performance liquid chromatography. The pr...
متن کاملRole of gonadotropin-releasing hormone (GnRH) in ovarian cancer
The expression of GnRH (GnRH-I, LHRH) and its receptor as a part of an autocrine regulatory system of cell proliferation has been demonstrated in a number of human malignant tumors, including cancers of the ovary. The proliferation of human ovarian cancer cell lines is time- and dose-dependently reduced by GnRH and its superagonistic analogs. The classical GnRH receptor signal-transduction mech...
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ژورنال
عنوان ژورنال: NIPPON SUISAN GAKKAISHI
سال: 1992
ISSN: 0021-5392,1349-998X
DOI: 10.2331/suisan.58.593