Expression of hormone genes and osmoregulation in homing chum salmon: A minireview
Expression of hormone genes and osmoregulation in homing chum salmon: A minireview
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DOI：
10.1016/j.ygcen.2007.01.010
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发表时间：
2007-06-01
影响因子：
2.7
通讯作者：
Urano, Akihisa
中科院分区：
文献类型：
--
作者：
Makino, Keita;Onuma, Takeshi A.;Urano, Akihisa
太平洋鲑鱼从海洋通过纳塔尔河洄游产卵。信息的表达基因编码的调节激素和迁移行为是很重要的分子事件，了解鲑鱼归巢的调节。本文简要综述了鲑鱼产卵前神经垂体激素、催产素（VT）、垂体激素、生长激素（GH）和催乳素（PRL）的基因表达调控。此后，我们介绍了最近的数据迁移行为从软件到固件环境。在产卵前的大麻哈鱼，下丘脑VT mRNA水平增加的男性，而下降的女性与盐的耐受性损失时，他们被保存在SW。GH mRNA的垂体中的量下降，在海洋迁移之前进入FW。低渗刺激SW-FW转移并没有显着影响PRL mRNA的量，但它升高SW和FW环境沿着在最终成熟的进展。在行为上，归巢的鲑鱼继续垂直运动之间的SW和FW层的河口的纳塔尔河约12它之前，上游迁移。在水族馆，这使得鱼自由访问SW和FW，产卵前的鲑鱼显示，与SW鱼相比，血浆睾酮（T）和雌二醇-17 β（E2）水平较低的个人花更长的时间在FW。两者合计，神经内分泌机制，盐和水的稳态和迁移行为从SW FW可能是下丘脑-垂体-性腺轴的控制下产卵前鲑鱼。(c)2007年爱思唯尔公司All rights reserved.
Pacific salmon migrate from ocean through the natal river for spawning. Information on expression of genes encoding osmoregulatory hormones and migratory behavior is important for understanding of molecular events that underlie osmoregulation of homing salmon. In the present article, regulation of gene expression for osmoregulatory hormones in pre-spawning salmon was briefly reviewed with special reference to neurobypophysial hormone, vasotocin (VT), and pituitary hormones, growth hormone (GH) and prolactin (PRL). Thereafter, we introduced recent data on migratory behavior from SW to FW environment. In pre-spawning chum salmon, the hypothalamic VT mRNA levels increased in the males, while decreased in the females with loss of salinity tolerance when they were kept in SW. The amounts of GH mRNA in the pituitary decreased during ocean migration prior to entrance into FW. Hypo-osmotic stimulation by SW-to-FW transfer did not significantly affect the amount of PRL mRNA, but it was elevated in both SW and FW environments along with progress in final maturation. Behaviorally, homing chum salmon continued vertical movement between SW and FW layers in the mouth of the natal river for about 12 It prior to upstream migration. Pre-spawning chum salmon in an aquarium, which allowed fish free access to SW and FW, showed that individuals with the lower plasma testosterone (T) and higher estradiol-17 beta (E2) levels spent longer time in FW when compared with the SW fish. Taken together, neuroendocrine mechanisms that underlie salt and water homeostasis and migratory behavior from SW to FW may be under the control of the hypothalamus-pituitary-gonadal axis in pre-spawning salmon. (c) 2007 Elsevier Inc. All rights reserved.