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在日本黑牛中注射促性腺激素释放激素后检测尿促黄体生成素

Detection of urinary luteinizing hormone in Japanese black cows after administration of gonadotropin-releasing hormone.

作者信息

Miyazaki Tamako, Uenoyama Reiko, Matsuzaki Takashi, Yamashita Tetsuro, Hirata Toh-Ichi, Miyazaki Masao

机构信息

Faculty of Agriculture, Iwate University, 3-18-8 Ueda, Morioka, Iwate 020-8550, Japan.

出版信息

J Vet Med Sci. 2021 Mar 11;83(3):431-434. doi: 10.1292/jvms.20-0506. Epub 2021 Jan 15.

DOI:10.1292/jvms.20-0506
PMID:33455959
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8025431/
Abstract

The blood luteinizing hormone (LH) surge in cows is well studied. However, little is known about urinary LH in cows. This study examined urinary LH concentrations after administration of gonadotropin-releasing hormone (GnRH) in six Japanese black cows to induce LH secretion from the pituitary gland into the bloodstream. Abrupt rises in plasma and urinary LH were observed after GnRH administration. Plasma and urinary LH peaked at 2 and 5 hr, respectively. A positive correlation was observed between plasma LH concentrations and urinary LH amounts. Ovulation was confirmed in the cows after 48 hr of GnRH administration. These data strongly suggest that urinary LH is derived from plasma LH, which triggers ovulation in cows.

摘要

牛血液中的促黄体生成素（LH）激增已得到充分研究。然而，关于牛尿液中的LH却知之甚少。本研究检测了6头日本黑牛在注射促性腺激素释放激素（GnRH）以诱导垂体向血液中分泌LH后尿液中LH的浓度。注射GnRH后，血浆和尿液中的LH均出现突然升高。血浆LH和尿液LH分别在2小时和5小时达到峰值。血浆LH浓度与尿液LH含量之间存在正相关。在注射GnRH 48小时后确认母牛排卵。这些数据有力地表明，尿液中的LH源自血浆LH，而血浆LH会触发母牛排卵。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1af/8025431/da7d0a95be90/jvms-83-431-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1af/8025431/671bb9008c8f/jvms-83-431-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1af/8025431/da7d0a95be90/jvms-83-431-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1af/8025431/671bb9008c8f/jvms-83-431-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1af/8025431/da7d0a95be90/jvms-83-431-g002.jpg

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基于雌二醇-孕酮的排卵同步方案发情强度对受胎效果的影响。
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