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首页> 外文期刊>Cell and Tissue Research >Distribution and changes of serotonin and dopamine levels in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei, during ovarian maturation cycle.
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Distribution and changes of serotonin and dopamine levels in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei, during ovarian maturation cycle.

机译：在卵巢成熟周期中，太平洋白虾南美白对虾的中枢神经系统和卵巢中5-羟色胺和多巴胺水平的分布和变化。

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摘要

We investigated changes in serotonin (5-HT) and dopamine (DA) levels and in their distribution patterns in the central nervous system (CNS) and ovary during the ovarian maturation cycle in the Pacific white shrimp, Litopenaeus vannamei. The concentrations of these two neurotransmitters were determined by using high performance liquid chromatography with electrochemical detection. The 5-HT concentration exhibited a gradual increase in the brain and thoracic ganglia during early ovarian stages I, II, and III, reaching a maximum at the mature ovarian stage IV, whereas DA showed its highest concentration at ovarian stage II in the brain and thoracic ganglia and then declined to its lowest concentration at ovarian stage IV. In the ovaries, 5-HT was lowest at ovarian stage I and gradually increased to a peak at ovarian stage IV. Conversely, the concentration of DA was highest at ovarian stages I and II and lowest at ovarian stage IV. In the brain, 5-HT immunoreactivity (-ir) from stage IV and DA-ir from stage II were distributed extensively in neurons of clusters 6, 11, and 17, in fibers, and in the anterior and posterior medial protocerebral, olfactory, antenna II, and tegumentary neuropils. In the circumesophageal, subesophageal, thoracic, and abdominal ganglia, both 5-HT-ir and DA-ir were detected in neuropils and surrounding neurons and fibers. 5-HT-ir and DA-ir were more intense in the thoracic ganglia than in other parts of the CNS. In the ovary, 5-HT-ir exhibited high intensity in late oocytes, whereas DA-ir was more intense in early oocytes. Thus, opposing changes occur in the levels of these two neurotransmitters and in their specific localizations in the CNS and ovary during ovarian maturation, indicating their important involvement in female reproduction.
机译：我们调查了太平洋白色虾对虾凡纳滨对虾卵巢成熟过程中5-羟色胺（5-HT）和多巴胺（DA）水平的变化及其在中枢神经系统（CNS）和卵巢中的分布模式。这两种神经递质的浓度是通过使用高效液相色谱和电化学检测来确定的。 5-HT浓度在卵巢早期I，II和III阶段显示大脑和胸神经节逐渐增加，在成熟的卵巢IV阶段达到最大值，而DA在大脑II和卵巢第二阶段显示最高浓度。胸神经节，然后在卵巢IV期降至最低浓度。在卵巢中，5-HT在卵巢I期最低，并在卵巢IV期逐渐升高至峰值。相反，DA的浓度在卵巢I期和II期最高，而在IV期最低。在大脑中，IV期的5-HT免疫反应性（-ir）和II期的DA-ir广泛分布在簇6、11和17的神经元，纤维，以及大脑前，后内侧的嗅觉中，触角II和外皮神经neuro。在食管，食管下，胸和腹神经节中，在神经纤维和周围的神经元和纤维中均检测到5-HT-ir和DA-ir。胸神经节中的5-HT-ir和DA-ir比中枢神经系统其他部位更强烈。在卵巢中，5-HT-ir在晚期卵母细胞中表现出高强度，而DA-ir在早期卵母细胞中更强。因此，在卵巢成熟过程中，这两种神经递质的水平及其在CNS和卵巢中的特定定位发生了相反的变化，表明它们在女性生殖中的重要作用。

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