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首页> 外文期刊>Cell and Tissue Research >Existence and distribution of gonadotropin-releasing hormone-like peptides in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei
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Existence and distribution of gonadotropin-releasing hormone-like peptides in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei

机译：促性腺激素释放激素样肽在太平洋白对虾凡纳滨对虾的中枢神经系统和卵巢中的存在和分布

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摘要

We used antibodies against octopus gonadotropin-releasing hormone (octGnRH) and tunicate GnRH (tGnRH-I) in order to investigate the existence and distribution of GnRH-like peptides in the central nervous system (CNS) and in the ovary during various stages of the ovarian cycle of the white shrimp, Litopenaeus vannamei. OctGnRH-immunoreactive and tGnRH-I-immunoreactive neurons and fibers were present in several regions of the supraesophageal ganglion (brain), subesophageal ganglion (SEG), thoracic ganglia, and abdominal ganglia. In the brain, both octGnRH immunoreactivity (ir) and tGnRH-I-ir were detected in neurons of clusters 6, 11, 17, and associated fibers, and the anterior medial protocerebral, posterior medial protocerebral, olfactory, and tegumentary neuropils. In the SEG and thoracic ganglia, octGnRH-immunoreactive and tGnRH-I-immunoreactive neurons and fibers were present in dorsolateral and ventromedial cell clusters and in surrounding fibers. Only immunoreactive fibers were detected in the abdominal ganglia. In the ovary, both octGnRH and tGnRH-I were detected at medium intensity in the cytoplasm of early step oocytes (Oc2) and, at high intensity, in Oc3. Furthermore, octGnRH-ir and tGnRH-I-ir were intense in follicular cells surrounding Oc2 and Oc3. The presence of GnRH-ir in the CNS and ovary indicates that GnRH-like peptides occur in the white shrimp, and that GnRHs are involved in the reproductive process, especially ovarian maturation and the differentiation of oocytes, as reported in other species.
机译：我们使用了抗章鱼促性腺激素释放激素（octGnRH）和被膜GnRH（tGnRH-1）的抗体，以研究GnRH样肽在中枢神经系统（CNS）和卵巢各个阶段的存在和分布。白色虾，南美白对虾的卵巢周期。 OctGnRH免疫反应性和tGnRH-1免疫反应性神经元和纤维存在于食管上神经节（脑），食管下神经节（SEG），胸神经节和腹部神经节的几个区域。在大脑中，在簇6、11、17和相关纤维的神经元以及前内侧小脑，后内侧小脑，嗅觉和外皮神经丛中均检测到octGnRH免疫反应性（ir）和tGnRH-I-ir。在SEG和胸神经节中，octGnRH免疫反应性和tGnRH-1免疫反应性神经元和纤维存在于背外侧和腹膜细胞簇以及周围的纤维中。在腹部神经节中仅检测到免疫反应性纤维。在卵巢中，在早期卵母细胞（Oc2）的细胞质中以中等强度检测到octGnRH和tGnRH-1，在Oc3中以高强度检测到。此外，octGnRH-ir和tGnRH-1-ir在Oc2和Oc3周围的卵泡细胞中含量很高。 GnRH-ir在中枢神经系统和卵巢中的存在表明，GnRH样肽存在于白色虾中，并且GnRHs参与了生殖过程，尤其是卵巢成熟和卵母细胞的分化，正如其他物种所报道的那样。

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