Seasonal Changes in Immunolocalization of Inhibin/Activin Subunits and Testicular Activity in Wild Male Raccoon Dogs (Nyctereutes procyonoides)
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概要
- 論文の詳細を見る
Thirty-four pairs of testes from wild adult raccoon dogs (Nyctereutes procyonoides) were obtained between September 2000 and May 2003. The cellular localization of the inhibin α and inhibin/activin (βA and βB) subunits in wild raccoon dog testes was investigated. The testicular weight and size and seminiferous tubule diameters were measured. There were marked seasonal variations in testicular weight and size and seminiferous tubule diameters, with values relatively low in September and high in March. Spermatogonia and primary spermatocytes were observed in September, and spermatogonia, spermatocytes, and round spermatids were present in January. All types of spermatogenic cells, including mature spermatozoa, were found in March, indicating that the breeding season is around March in Japan. Thereafter, spermatogonia and degenerating spermatocytes were observed in April. The sections of testes were immunostained by the avidin-biotin-peroxidase complex method (ABC) using polyclonal antisera raised against porcine inhibin α, inhibin/activin βA and inhibin/activin βB. The inhibin α and inhibin/activin (βA and βB) subunits were only expressed in Leydig cells in September. On the other hand, the inhibin α, βA, and βB subunits were observed in Leydig cells and Sertoli cells, but not in germ cells, in March. These results suggest that the testes of wild raccoon dogs have the ability to synthesize inhibins, and the cellular localization of inhibin/activin subunits showed season-related changes in the breeding and non-breeding seasons.
- 日本繁殖生物学会の論文
- 2006-08-01
著者
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坪田 敏男
北海道大学大学院獣医学研究科生態学教室
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WATANABE Gen
Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Toky
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TAYA Kazuyoshi
Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Toky
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TSUBOTA Toshio
岐阜大学農学部
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坪田 敏男
兵庫県森林動物研究センター
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Tsubota Toshio
Laboratory Of Wildlife Biology Graduate School Of Veterinary Medicine Hokkaido University
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MEDAN Mohamed
Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology
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XU Meiyu
College of Biological Science and Technology, Beijing Forestry University
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Taya Kazuyoshi
Laboratory Of Veterinary Physiology Department Of Veterinary Medicine Faculty Of Agriculture Tokyo U
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Tsubota Toshio
Department Of Environmental Veterinary Science Graduate School Of Veterinary Medicine Hokkaido Unive
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Xu Meiyu
College Of Biological Science And Technology Beijing Forestry University
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Weng Qiang
College Of Biological Science And Technology Beijing Forestry University
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Tsubota T
Department Of Environmental Veterinary Science Graduate School Of Veterinary Medicine Hokkaido Unive
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Tsubota Toshio
Division Of Veterinary Medicine Faculty Of Agriculture Gifu University
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Tsubota Toshio
United Graduate School Of Veterinary Medicine Gifu University
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Watanabe Gen
Laboratory Of Veterinary Physiology Department Of Veterinary Medicine Faculty Of Agriculture Tokyo U
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Medan Mohamed
Faculty Of Veterinary Medicine Suez Canal University
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WENG Qiang
Faculty of Biological Science and Technology, Beijing Forestry University
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XU Meiyu
Faculty of Biological Science and Technology, Beijing Forestry University
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Medan Mohamed
東京農工大学 農学部獣医学科獣医生理学研究室
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Tsubota Toshio
Department Of Veterinary Obstetrics Faculty Of Veterinary Medicine Hokkaido University
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Weng Qiang
Laboratory Of Veterinary Physiology Department Of Veterinary Medicine Faculty Of Agriculture Tokyo U
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Medan Mohamed
Laboratory Of Veterinary Physiology Tokyo University Of Agriculture And Technology
-
Medan Mohamed
エジプト
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Watanabe Gen
Laboratories Of Veterinary Physiology Dep. Of Veterinary Medicine Fac. Of Agriculture Tokyo Univ. Of
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