Planas J V, Swanson P, Rand-Weaver M, Dickhoff W W
School of Fisheries HF-15, University of Washington, Seattle 98195.
Gen Comp Endocrinol. 1992 Jul;87(1):1-5. doi: 10.1016/0016-6480(92)90142-7.
Somatolactin (SL), a newly discovered pituitary hormone of the teleost pars intermedia, is structurally similar to prolactin and growth hormone. The function(s) of SL are not yet established, although evidence suggests that it may play a role in reproduction. Possible steroidogenic activity of coho salmon SL was tested and compared with gonadotropin I (GTH I) in incubations of ovarian follicles or testicular fragments. SL stimulated production of 11-ketotestosterone and testosterone by testicular fragments, and production of estradiol by ovarian follicles in a concentration-dependent manner. However, the steroidogenic activity of SL was considerably less than that of GTH I. These results suggest that SL may play a role in regulation of gonadal function in salmon.
生长抑素（SL）是硬骨鱼中间部新发现的一种垂体激素，其结构与催乳素和生长激素相似。尽管有证据表明生长抑素可能在生殖过程中发挥作用，但其功能尚未明确。在卵巢卵泡或睾丸组织块培养中，对银大麻哈鱼生长抑素可能的类固醇生成活性进行了测试，并与促性腺激素I（GTH I）进行了比较。生长抑素以浓度依赖的方式刺激睾丸组织块产生11-酮睾酮和睾酮，以及卵巢卵泡产生雌二醇。然而，生长抑素的类固醇生成活性远低于促性腺激素I。这些结果表明，生长抑素可能在鲑鱼性腺功能调节中发挥作用。
