HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine >
Peer-reviewed Journal Articles, etc >

Endometrial epidermal growth factor profile and its abnormalities in dairy cows

This item is licensed under: Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International

Files in This Item:
62_2016-039.pdf670.52 kBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/63896

Title: Endometrial epidermal growth factor profile and its abnormalities in dairy cows
Authors: Katagiri, Seiji Browse this author →KAKEN DB
Moriyoshi, Masaharu Browse this author →KAKEN DB
Yanagawa, Yojiro Browse this author
Keywords: Biopsy
Endometrial epidermal growth factor (EGF)
High yielding cows
Repeat breeding
Uterus
Issue Date: Oct-2016
Publisher: Society for Reproduction and Development(SRD)
Journal Title: Journal of Reproduction and Development
Volume: 62
Issue: 5
Start Page: 465
End Page: 470
Abstract: 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.
Rights: http://creativecommons.org/licenses/by-nc-nd/4.0/
Type: article
URI: http://hdl.handle.net/2115/63896
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 片桐 成二

Export metadata:

OAI-PMH ( junii2 , jpcoar )

MathJax is now OFF:


 

 - Hokkaido University