排序方式: 共有12条查询结果,搜索用时 0 毫秒
11.
N. Kumakura K. Okuzawa S. Yamaguchi K. Gen B.S. Lim H. Kagawa 《Fish physiology and biochemistry》2003,28(1-4):99-100
We examined the effects of gonadotropin-releasing hormone agonist (GnRHa) and testosterone (T) on the level of gonadotropin subunit mRNAs in the pituitary of ovariectomized or intact female red seabream. Ovariectomy induced increase of seabream (sb) GnRH, glycoprotein (GP) α and luteinizing hormone (LH) β mRNA levels. GnRHa treatment also stimulated GPα and LHβ mRNA levels. T treatment reduced GPα and LHβ mRNA expression probably via negative feedback action on sbGnRH. Both GnRHa and T treatment had no effect on follicle-stimulating hormone (FSH) β mRNA levels. These results suggest that the regulatory mechanisms of GPα and LHβ gene expression differ from those of FSHβ gene. 相似文献
12.
Koichi Okuzawa Naoki Kumakura Koichiro Gen Sonoko Yamaguchi Bong-Soo Lim Hirohiko Kagawa 《Fish physiology and biochemistry》2003,28(1-4):439-440
In the present study, we examined the effect of high water temperature on brain-pituitary-gonad (B-P-G) axis of a perciform fish red seabream, Pagrus (Chrysophrys) major during its spawning season (April-May). High water temperature negatively affected all levels in B-P-G axis and turned out to be the termination factor of the spawning season of this species. 相似文献