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Endometrial epidermal growth factor profile and its abnormalities in dairy cows

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タイトル: Endometrial epidermal growth factor profile and its abnormalities in dairy cows
著者: Katagiri, Seiji 著作を一覧する
Moriyoshi, Masaharu 著作を一覧する
Yanagawa, Yojiro 著作を一覧する
キーワード: Biopsy
Endometrial epidermal growth factor (EGF)
High yielding cows
Repeat breeding
Uterus
発行日: 2016年10月
出版者: Society for Reproduction and Development(SRD)
誌名: Journal of Reproduction and Development
巻: 62
号: 5
開始ページ: 465
終了ページ: 470
抄録: Normal cows have 2 peaks in endometrial epidermal growth factor (EGF) concentrations on Days 2-4 and 13-14, and the absence of peaks has been linked to reduced fertility in repeat breeder (RB) cows. However, the timing of the peaks (i.e., day of examinations) was estimated for a few cows per cycle day. Therefore, the present study characterized EGF peaks and examined if the absence of peaks in RB cows indicate either peak loss or changed timing. In Study 1, 20 Holstein cows were examined for EGF concentrations between Days 1 and 6 using repeated biopsy of the uterine endometrial tissues. Sixteen cows exhibited increased EGF concentrations for 2-3 days between Days 2 and 5. All 16 cows exhibited increased EGF concentrations on Day 3. In Study 2, 10 cows were examined for EGF concentrations between Days 11 and 16. Increased EGF concentrations for 2-3 days were found in 7 cows between Days 12 and 15. All 7 cows exhibited increased EGF concentrations on Days 13 and 14. In Study 3, 12 RB cows were examined for endometrial EGF concentrations between Days 1 and 6. Four cows exhibited an increase of EGF concentrations on Days 3 and 4, whereas 8 cows (66.7%) exhibited low EGF concentrations throughout the study period. In conclusion, Days 3 and 13-14 are suitable days to examine a cyclic change of endometrial EGF concentrations. Further, low EGF concentrations on Day 3 in RB cows indicated an absence, but not altered timing, of the EGF peak.
資料タイプ: article
URI: http://hdl.handle.net/2115/63896
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 片桐 成二

 

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