Calcium ions as a mediator in GnRH action on gonadotropin release in the common carp (Cyprinus carpio L)
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منابع مشابه
Calcium ions as a mediator in GnRH action on gonadotropin release in the common carp (Cyprinus carpio L).
Collagenase-dispersed carp pituitary cells in a perifusion system were used to study the role of calcium ions in the mechanism of GnRH action on the release of maturational gonadotropin (GtH) in fish. The specific calcium chelator EGTA and the calcium antagonist manganese (Mn2+) caused a 40% inhibition in the basal GtH release and completely blocked GnRH-stimulated GtH release. Short-term appli...
متن کاملInvolvement of voltage-dependent calcium channels (VDCC) in the action of GnRH on GtH release in common carp (Cyprinus carpio L): comparison with K+ action.
The involvement of different types of voltage-dependent calcium channels (VDCC) in the stimulatory action of GnRH (in comparison with K+) on maturational gonadotropin (GtH) release was investigated using superfused carp pituitary cells. The action of these 2 stimulants was not modified either by D600 or nifedipine (drugs blocking L-type of VDCC). Cadmium (Cd2+), which blocks all types of VDCC i...
متن کاملCommon Carp, Cyprinus carpio
The common carp (Cyprinus carpio) belongs to the family Cyprinidae. In nature, carp live in the middle or lower reaches of a river with slow currents, or in marshes. Their habitats are usually weedy areas with a muddy bottom. Carp fry feed on zooplankton such as rotifers and copepods, but as they grow up they become benthic feeders, feeding on animals and other organic material. The cyprinids h...
متن کاملCommon carp - Cyprinus carpio
Distribution ! e common carp [Cyprinus carpio Linnaeus (1758)] has been one of the oldest domesticated species of fi sh for food. Culture of carp in China dates back to at least the 5th century BC, although domestication began much later. ! e European races of carp derived from wild carp of the Danube; the earliest attempts date back to the Roman Empire and spread of Christianity in Europe, fro...
متن کاملThe effects of reserpine and LHRH or salmon GnRH analogues on gonadotropin release, ovulation and spermiation in common carp (Cyprinus carpio L.).
The effects of reserpine (catecholamine depletor) and LHRH analogues on gonadotropin secretion, spermiation and ovulation of common carp were investigated. Injections of reserpine alone at a dose of 1 or 7 mg/kg of body weight stimulated spermiation, and reserpine at a dose of 1 mg/kg of body weight in combination with (D-Arg6, Trp7, Leu8, Pro9, NEt)-LHRH (s-GnRH-A) or with (D-Ala6, Pro9)-LHRH ...
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ژورنال
عنوان ژورنال: Reproduction Nutrition Développement
سال: 1990
ISSN: 0181-1916
DOI: 10.1051/rnd:19900403