授乳及び非授乳中のニホンツキノワグマ(Ursus thibetanus japonicus)における血清プロジェステロン、エストラジオール-17β、黄体形成ホルモン、プロラクチン濃度の変化

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概要

• 論文の詳細を見る

• The concentrations of progesterone (P4), estradiol-17 β (E2), luteinizing hormone (LH) and prolactin (PRL) in serum obtained from 9 captive female Japanese black bears, Ursus thibetanus japonicus, (7 lactating and 2 non-lactating) were obtained by a heterologous radioimmunoassay to clarify hormonal profiles during the pre- and post-parturition and lactation periods. The present study provides the first evidence to validate LH and PRL radioimmunoassay in bear sera by using the canine LH and PRL and the antibody to these hormones. In 7 bears which gave birth and lactated, serum P4 concentrations were high during prepartum phases in December and January but fell rapidly after parturition in February (p<0.05; comparison of pre- and post-parturient phases). Serum E2 and LH concentrations did not change significantly throughout pre- and post-parturition. Serum PRL concentrations increased significantly after parturition in February (p<0.05; comparison of pre- and post-parturient phases) and exceeded 10 ng/ml in all lactating bears from Days 41~60 after parturition in March. On the other hand, in 2 bears which did not produce cubs, serum P4 concentrations were high in December and January and decreased after February. Serum E2 concentrations were relatively low between December and February but increased in March. Serum LH concentrations were relatively high in December and remained low throughout January to April, whereas PRL concentrations increased gradually after February, but were below 10 ng/ml. These results suggest that a rapid decline in P4 and a marked increase in PRL occurred in association with events such as parturition and lactation, but there is no clear evidence that changes in serum E2 and LH concentrations are associated with parturition and lactation.

• 日本繁殖生物学会の論文

著者

• KOMATSU Takeshi

  The Institute of Japanese Black Bear in Ani

• Murase Tetsuma

  Laboratory of Theriogenology, Division of Veterinary Medicine, Faculty of Applied Biological Science

• TSUBOTA Toshio

  Laboratory of Wildlife Biology, Graduate School of Veterinary Medicine, Hokkaido University

• Kita Isao

  Laboratory of Theriogenology, Faculty of Agriculture, Gifu University, Yanagido 1-1, Gifu 501-1193,

• 佐藤 美穂

  United Graduate School of Veterinary Science, Gifu University

• 中野 典子

  Laboratory of Theriogenology, Faculty of Agriculture, Gifu University

• 坪田 敏男

  Laboratory of Theriogenology, Faculty of Agriculture, Gifu University

• KUDO Tadaaki

  Laboratory of Veterinary Surgery, Faculty of Agriculture, Gifu University

• SATO Miho

  United Graduate School of Veterinary Science, Gifu University

• NAKANO Noriko

  Laboratory of Theriogenology, Faculty of Agriculture, Gifu University

関連論文

• Normal Sperm Morphology and Changes of Semen Characteristics and Abnormal Morphological Spermatozoa among Peri-mating Seasons in Captive Japanese Black Bears (Ursus thibetanus japonicus)
• Dilution of Boar Ejaculates with BTS Containing HEPES in Place of Bicarbonate Immediately After Ejaculation Can Reduce the Increased Inducibility of the Acrosome Reaction by Treatment with Calcium and Calcium Ionophore A23187, Which is Potentially Associa
• Fetal Age Estimation of Hokkaido Sika Deer (Cervus nippon yesoensis) Using Ultrasonography During Early Pregnancy
• Seasonal Changes in Subcellular Structures of Leydig and Sertoli Cells in the Japanese Black Bear, Ursus thibetanus japonicus
• Localization of Five Steroidogenic Enzyme mRNAs in Japanese Black Bear (Ursus thibetanus japonicus) Testes During the Mating Season by In Situ Hybridization
• Dilution of Boar Ejaculates with BTS Containing HEPES in Place of Bicarbonate Immediately After Ejaculation Can Reduce the Increased Inducibility of the Acrosome Reaction by Treatment with Calcium and Calcium Ionophore A23187, Which is Potentially Associa
• 和牛精子が発情期の子宮頚管粘液へ侵入する能力を測定する方法の簡便化
• 採取した個体の異なる組合わせで混合した子宮頚管粘液へ黒毛和種種雄牛精子が侵入する距離の相異
• Leptin Receptor (Ob-R) Expression in the Ovary and Uterus of the Wild Japanese Black Bear (Ursus thibetanus japonicus)
• 授乳及び非授乳中のニホンツキノワグマ(Ursus thibetanus japonicus)における血清プロジェステロン、エストラジオール-17β、黄体形成ホルモン、プロラクチン濃度の変化
• Seasonal Changes in Semen Characteristics, Composition of Seminal Plasma and Frequency of Acrosome Reaction Induced by Calcium and Calcium Ionophore A23187 in Large White Boars
• Hepatozoon ursi n. sp. (Apicomplexa : Hepatozoidae) in Japanese black bear (Ursus thibetanus japonicus)
• Sex Identification by Alternative Polymerase Chain Reaction Methods in Falconiformes(Reproductive Biology)
• セラミドはカルシウムとカルシウムイオノホアA23187により誘起されたブタ射出精子の先体反応を増強する
• Changes in Serum Progesterone, Estradiol-17β, Luteinizing Hormone and Prolactin in Lactating and Non-lactating Japanese Black Bears (Ursus thibetanus japonicus)
• Hyperactivated Motility of Frozen-Thawed Spermatozoa from Fertile and Subfertile Japanese Black Bulls Induced by Cyclic Adenosine 3',5'-Monophosphate Analogue, cBiMPS
• Generation of Diacylglycerol during the Acrosome Reaction Induced by Ca2+ and Ca2+ Ionophore A23187 in Frozen-Thawed Spermatozoa from Fertile and Subfertile Japanese Black Bulls
• セラミドはカルシウムとカルシウムイオノホアA23187により誘起されたブタ射出精子の先体反応を増強する
• 和牛精子が発情期の子宮頚管粘液へ侵入する能力を測定する方法の簡便化

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