Preliminary Results Concerning the Influence of @entity1 Kisspeptin on LH Secretion in @entity26727 ( XXXX ) Females at the Stage of Ovarian Recrudescence and Spawning Season.

@entity1 @entity26727 @entity33913 @entity1766 @entity935 @entity4397 @entity1176
The aim of the experiments was to evaluate the influence of @entity1 kisspeptin on LH secretion of @entity26727 ( @entity26727 ) females during ovarian recrudescence and spawning season. For the experiments, @entity1 kisspeptin @entity33913 (0.1 mg kg(-1) of body weight--b.w.), @entity1176 analogue (Des Gly(10), D-Ala(6)) GnRH-A (20   g kg(-1) b.w.) and @entity935 antagonist ( @entity1766 ) (5 mg kg(-1) b.w.) were used alone or in combinations. At 3, 6, 12, 24 hours after injection(s) blood samples were collected from all fish. LH levels were measured in plasma with the use of the ELISA method. @entity33913 did not show any significant effects on spontaneous LH secretion in both tested seasons. At 12 hours sampling time (both stages of gonad maturity) a combination of tested compounds (GnRH-A+ @entity33913 ) significantly increased LH release in comparison with the control. In the stage of gonad recrudescence @entity33913 significantly increased LH secretion evoked by @entity1766 at 24 hours. A combination of three components: @entity33913 , GnRH-A, and @entity1766 significantly decreased LH secretion in comparison to LH secretion evoked by @entity4397 and @entity1766 during stage of gonad recrudescence. These results suggest that kisspeptin is involved in seasonal control of reproduction in @entity26727 . The possible interaction of kisspeptin and the dopaminergic system is also discussed.
