Distribution of Immunoreactivities for Adenohypophysial Hormones in the Pituitary Gland of the Polypteriform Fish, Polypterus endlicheri(Endocrinology)
スポンサーリンク
概要
- 論文の詳細を見る
Polypteriform fish constitutes the most primitive living descendent of the ancient body fish. In polypteriform fish, only proopiomelanocortin (POMC) has been indentified so far in the adenohypophysis which is surprising in view of their evolutionary importance. In the present study, distribution of immunoreactive adenohypophysial hormones was examines in juvenile individuals or Polypterus endlicheri. Adernocorticotropin (ATCH)-like cells were detected by antisera to salmon POMC N-terminal peptide, porcine ACTH and mammalian α-malanotropin (MSH), and were distributed in the rostral pars distalis in close proximity to the hypopysical duct. MSH-like cells were found in the pars intermedia, and were stained by anti-salmon N-Ac-β-endorphin ll as well as anti-mammalian α-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 rostal pars distails, 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 pars intermedia. Two types of glycoprotein homone-positive cells were detected in the proximal pars distalis. Although both tyoes of cells were stained with several antisera to glycoprotein hormones, such as sturgeon LHβ and salmon LHβ, it was difficult to know which types of cells produce LH, FSH, ot TSH. Thsu, the present study revealed seven types of adenohypophysicial hotmone-like cells in the Polyterus pituitary gland, ehich may provide the morphological basis for better understanding on evolution of the pituitary gland and the adenohypophysicial hormones in vertebrates.
- 社団法人日本動物学会の論文
- 2005-10-25
著者
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SHIMOTANI Toyokazu
Sado Marine Biological Station, Faculty of Science, Niigata University
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NOZAKI Masumi
Sado Marine Biological Station, Faculty of Science, Niigata University
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Nozaki Masumi
Sado Marine Biological Station Faculty Of Science Niigata University
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Nozaki Masumi
Niigata Univ. Niigata Jpn
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Miki Makoto
Sado Marine Biological Station Niigata University
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Shimotani Toyokazu
Sado Marine Biological Station Faculty Of Science Niigata University
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Shimotani Toyokazu
Sado Marine Biological Station Niigata University
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