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首页> 外文期刊>Cell and Tissue Research >Presence of gonadotropin-releasing hormone-like peptide in the central nervous system and reproductive organs of the male blue swimming crab, Portunus pelagicus, and its effect on spermatogenesis
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Presence of gonadotropin-releasing hormone-like peptide in the central nervous system and reproductive organs of the male blue swimming crab, Portunus pelagicus, and its effect on spermatogenesis

机译：促性腺激素释放激素样肽在雄性蓝色游泳梭子蟹（Portunus pelagicus）的中枢神经系统和生殖器官中的存在及其对精子发生的影响

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Our previous studies have demonstrated that lamprey gonadotropin-releasing hormone-III (lGnRH-III)-like peptide occurs in the central nervous system (CNS) of decapod crustaceans (Macrobrachium rosenbergii, Penaeus monodon, Portunus pelagicus), and that lGnRH-III is the most potent in stimulating ovarian maturation compared with other GnRH isoforms. In this study, we examined the localization of lGnRH-III-like peptide in the CNS and male reproductive organs of the blue swimming crab by using anti-lGnRH-III as a probe. In the brain, lGnRH-III immunoreactivity (-ir) was detected in neurons of clusters 6, 10, 11, 14/15, 16, and 17 and in many neuropils. In the subesophageal ganglion, lGnRH-III-ir was present in neurons of the dorso-lateral and ventro-medial clusters. In the thoracic ganglia, lGnRH-III-ir was observed in the large-sized neurons between the thoracic neuropils and in the ventromedial cluster of the abdominal ganglia. In the testis, lGnRH-III-ir was detected in nurse cells, hemocytes, spermatids 2, and the outer and inner zones of the acrosomes of spermatozoa. Bioassay showed that lGnRH-III significantly increased the testis-somatic index, the percentage of late stages of seminiferous tubules (stages VII-IX), the diameter of the seminiferous tubules, and the number of BrdU-labeled early germ cells compared with the control groups. Thus, lGnRH-III-like peptide exists in the male crab and possibly enhances germ cell proliferation and maturation in the testes, leading to increased sperm production.
机译：我们以前的研究表明，七lamp鱼促性腺激素释放激素III（lGnRH-III）样肽存在于十足类甲壳动物（罗氏沼虾，斑节对虾，远古Portunus虾）的中枢神经系统（CNS）中，而lGnRH-III是与其他GnRH同工型相比，在刺激卵巢成熟方面最有效。在这项研究中，我们通过使用抗lGnRH-III作为探针检查了lGnRH-III样肽在蓝色游泳蟹的中枢神经系统和雄性生殖器官中的定位。在大脑中，在簇6、10、11、14 / 15、16和17的神经元以及许多神经纤维中检测到了IgnRH-III免疫反应性（-ir）。在食管下神经节中，背外侧和腹内侧神经簇的神经元中存在lGnRH-III-ir。在胸神经节中，在胸神经柱之间和腹部神经节的腹侧簇中的大型神经元中观察到了lGnRH-III-ir。在睾丸中，在哺乳细胞，血细胞，精子2以及精子顶体的内部和外部区域检测到了IgnRH-III-ir。生物测定显示，与对照相比，lGnRH-III显着提高了睾丸的体细胞指数，生精小管晚期阶段（VII-IX期）的百分比，生精小管的直径以及BrdU标记的早期生殖细胞的数量。组。因此，雄性蟹中存在类似于IgnRH-III的肽，并可能增强睾丸中生殖细胞的增殖和成熟，从而导致精子产量增加。

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