成熟雄ラットにおける潜在精巣作出が精子運動能と精巣内分泌機能に及ぼす影響
スポンサーリンク
概要
- 論文の詳細を見る
The effect of induced cryptorchidism on testicular function and sperm motility was investigated. Bilateral cryptorchidism was created surgically in adult male rats (treated group), and sham-operated rats were used as a control group. Five rats from each group were sacrificed on days 1, 3, 5, and 7 after surgery. The percentage of motile spermatozoa began to decrease 1 day after the operation, followed by an abrupt decline 3 and 5 days later in cryptorchid rats. Furthermore, there were significant decreases in the other sperm motility parameters 5 days after inducement of cryptorchidism. In cryptorchid rats, plasma concentrations of LH, FSH, testosterone, and inhibin B were significantly lower than in the control group 1 day after the operation. Thereafter, plasma concentrations of LH, FSH, and testosterone gradually increased in the cryptorchid rats. On the other hand, plasma concentrations of inhibin B showed a further decline from day 3 after the operation onward. Concentrations of immunoreactive (ir)-inhibin, but not testosterone, in testicular interstitial fluid were remarkably increased until 3 days after surgery in the cryptorchid rats, and declined thereafter. Testicular response to human chorionic gonadotropin (hCG) for testosterone release was decreased in the cryptorchid rats compared with the control rats, indicating that heat stress to testes resulted in a reduction of the activity of Leydig cells and Sertoli cells. These results clearly indicate that heat stress to the testes resulted in a significant reduction of sperm activity within 3 days, and this was followed by changes in testicular endocrine function.
- 日本繁殖生物学会の論文
著者
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小津 真理子
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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MEDAN Mohamed
Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology
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WATANABE Gen
Department of Basic Veterinary Sciences, The United Graduate School of Veterinary Sciences, Gifu Uni
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TAYA Kazuyoshi
Department of Basic Veterinary Sciences, The United Graduate School of Veterinary Sciences, Gifu Uni
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Li Chunmei
Department Of Pathology Graduate School Of Medical Sciences Nagoya City University
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任 竜権
Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu Univ
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小津 真理子
Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Toky
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Ren LongQuan
Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu Univ
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OZU Mariko
Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Toky
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Li Chunmei
Department Of Basic Veterinary Science The United Graduate School Of Veterinary Sciences Gifu Univer
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Watanabe Gen
Department Of Basic Veterinary Science United Graduate School Of Veterinary Sciences Gifu University
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Ren Longquan
Department Of Basic Veterinary Science The United Graduate School Of Veterinary Sciences Gifu Univer
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Medan Mohamed
Laboratory Of Veterinary Physiology Tokyo University Of Agriculture And Technology
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Taya Kazuyoshi
Department Of Basic Veterinary Science United Graduate School Of Veterinary Sciences Gifu University
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Ren LongQuan
Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University
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OZU Mariko
Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology
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