Areolae of the Placenta in the Antarctic Minke Whale (Balaenoptera bonaerensis)
スポンサーリンク
概要
- 論文の詳細を見る
In this study, we examined the existence and structure of areolae and the steroidogenesis of areolar trophoblast cells in the Antarctic minke whale placenta morphologically and immunohistochemically. Placentas were collected from the 15th, 16th and 18th Japanese Whale Research Program under Special Permit in the Antarctic (JARPA) and 1st JARPA II organized by the Institute of Cetacean Research in Tokyo, Japan. The opening and cavity of fetal areolae formed by taller columnar trophoblast cells (areolar trophoblast cells) with long microvilli and a bright cytoplasm, as compared with the trophoblast cells of the chorionic villi interdigitating with the endometrial crypts, were recognized in observations of serial sections. The opening of the areolar cavity was hidden by chorionic villi with areolar trophoblast cells. Furthermore, a closed pouch-like structure lined by tall columnar cells similar to areolar trophoblast cells within the stroma of chorionic villi was noticed and continued to the areolar cavity, with the opening seen on serial sections. In a surface investigation of the chorion and endometrium by SEM, maternal (endometrial) areolae irregularly surrounded by endometrial folds were obvious. Moreover, we distinguished areolar trophoblast cells with long microvilli attached with many blebs from trophoblast cells. In our immunohistochemical observations, a steroidogenic enzyme, cytochrome P450 side chain cleavage enzyme (P450scc), was detected with strong immunoreactivity in trophoblast cells. However, areolar trophoblast cells showed weak or no immunoreactivity for P450scc.
- 日本繁殖生物学会の論文
著者
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Ohsumi Seiji
Institute Of Cetacean Research
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Tsubota Toshio
Laboratory Of Ecology Department Of Environmental Veterinary Sciences Graduate School Of Veterinary
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KITAMURA Nobuo
Laboratory of Anatomy, Department of Basic Veterinary Sciences, Obihiro University of Agriculture an
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Hayakawa Daisuke
Laboratory of Anatomy, Department of Basic Veterinary Science, Obihiro University of Agriculture and
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ISHIKAWA Hajime
Institute of Cetacean Research
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Miyamoto Akio
Department Of Agricultural And Life Science Obihiro University Of Agriculture And Veterinary Medicin
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Tetsuka Masafumi
Department Of Agricultural And Life Science Obihiro University Of Agriculture & Veterinary Medic
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Fukui Yutaka
Department Of Animal Science Obihiro University Of Agriculture And Veterinary Medicine
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Sasaki Motoki
Laboratory Of Anatomy Obihiro University Of Agriculture And Veterinary Medicine
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AMANO Yoko
Laboratory of Veterinary Anatomy, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Hokkaido 080-8555, Japan
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MOGOE Toshihiro
Institute of Cetacean Research, Tokyo 104-0055, Japan
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BUDIPITOJO Teguh
Faculty of Veterinary Medicine, Gadjah Mada University, Yogyakarta 55281, Indonesia
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Ishikawa Hajime
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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