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首页> 外文期刊>Zoological Science >Distribution of Immunoreactivities for Adenohypophysial Hormones inthe Pituitary Gland of the Polypteriform Fish, Polypterus endlicheri
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Distribution of Immunoreactivities for Adenohypophysial Hormones inthe Pituitary Gland of the Polypteriform Fish, Polypterus endlicheri

机译：翼状Poly鱼垂体腺垂体腺垂体激素免疫反应的分布

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Polypteriform fish constitutes the most primitive living descendent of the ancient bony fish. In polypteriform fish, only proopiomelanocortin (POMC) has been identified so far in the adenohypophysis, which is surprising in view of their evolutionary importance. In the present study, distribution of immunoreactive adenohypophysial hormones was examined in juvenile individuals of Polypterus endlicheri. Antisera to tetrapod and fish adenohypophysial hormones were used as immunostaining probes. Adrenocorticotropin (ACTH)-like cells were detected by antisera to salmon POMC N-terminal peptide, porcine ACTH and mammalian alpha-melanotropin (MSH), and were distributed in the rostral pars distalis in close proximity to the hypophysial duct. MSH-like cells were found in the pars intermedia, and were stained by anti-salmon N-Ac- beta -endorphin II as well as anti-mammalian alpha-MSH and anti-salmon POMC-N terminal peptide. Prolactin (PRL)-like cells were detected only after application of anti-sturgeon PRL, and were distributed in the rostral pars distalis, where PRL-positive material was found in columnar mucinous cells lining the diverticuli of the hypophysial duct. Growth hormone (GH)-like cells were stained with antisera to sturgeon GH, human GH, salmon GH and blue shark GH, and were distributed in the proximal pars distalis. Somatolactin (SL)-like cells were stained with anti-salmon SL, and were distributed in the pars intermedia. Two types of glycoprotein hormone-positive cells were detected in the proximal pars distalis. Although both types of cells were stained with several antisera to glycoprotein hormones, such as sturgeon LH beta and salmon LH beta , it was difficult to know which types of cells produce LH, FSH, or TSH. Thus, the present study revealed seven types of adenohypophysial hormone-like cells in the Polypterus pituitary gland, which may provide the morphological basis for better understanding on evolution of the pituitary gland and the adenohypophysial hormones in vertebrates.
机译：多翅目鱼是古代骨鱼最原始的后代。到目前为止，在多翅目鱼类中，仅在腺垂体中鉴定出了proopiomelanocortin（POMC），鉴于其进化重要性，这是令人惊讶的。在当前的研究中，免疫活性腺垂体激素的分布在未成年的息肉（Polypterus endlicheri）个体中进行了检查。使用针对四足动物和鱼类腺垂体激素的抗血清作为免疫染色探针。鲑鱼POMC N端肽，猪ACTH和哺乳动物α-黑素皮质激素（MSH）的抗血清检测到了促肾上腺皮质激素（ACTH）样细胞，并分布在靠近垂体管的远侧喙部。在pars intermedia中发现了MSH样细胞，并被抗鲑鱼N-Ac-β-内啡肽II以及抗哺乳动物α-MSH和抗鲑鱼POMC-N末端肽染色。催乳素（PRL）样细胞仅在使用抗-鱼PRL后才被检测到，并分布在远侧鼻翼，其中在垂体下垂体内膜的柱状粘液细胞中发现PRL阳性物质。用抗血清对st鱼生长激素（GH），人生长激素（GH），鲑鱼生长激素（GH）和蓝鲨生长激素（GH）染色，将生长激素（GH）样细胞染色，并分布在远端近端。用抗鲑鱼SL对Somatolactin（SL）样细胞进行染色，并分布在pars intermedia中。在远端近端检出了两种类型的糖蛋白激素阳性细胞。尽管两种类型的细胞都用几种抗糖蛋白激素的抗血清染色，例如st鱼LH beta和鲑鱼LH beta，但很难知道哪种类型的细胞会产生LH，FSH或TSH。因此，本研究揭示了息肉垂体腺中七种类型的腺垂体激素样细胞，这可能为更好地了解脊椎动物垂体和腺垂体激素的进化提供了形态学基础。

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