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

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...

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Autores principales: MIYAZAKI, Tamako, UENOYAMA, Reiko, MATSUZAKI, Takashi, YAMASHITA, Tetsuro, HIRATA, Toh-ichi, MIYAZAKI, Masao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Japanese Society of Veterinary Science 2021
Materias:
Theriogenology
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8025431/
https://www.ncbi.nlm.nih.gov/pubmed/33455959
http://dx.doi.org/10.1292/jvms.20-0506
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author MIYAZAKI, Tamako
UENOYAMA, Reiko
MATSUZAKI, Takashi
YAMASHITA, Tetsuro
HIRATA, Toh-ichi
MIYAZAKI, Masao
author_facet MIYAZAKI, Tamako
UENOYAMA, Reiko
MATSUZAKI, Takashi
YAMASHITA, Tetsuro
HIRATA, Toh-ichi
MIYAZAKI, Masao
author_sort MIYAZAKI, Tamako
collection PubMed
description 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.
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spelling pubmed-80254312021-04-13 Detection of urinary luteinizing hormone in Japanese black cows after administration of gonadotropin-releasing hormone MIYAZAKI, Tamako UENOYAMA, Reiko MATSUZAKI, Takashi YAMASHITA, Tetsuro HIRATA, Toh-ichi MIYAZAKI, Masao J Vet Med Sci Theriogenology 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. The Japanese Society of Veterinary Science 2021-01-15 2021-03 /pmc/articles/PMC8025431/ /pubmed/33455959 http://dx.doi.org/10.1292/jvms.20-0506 Text en ©2021 The Japanese Society of Veterinary Science This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (by-nc-nd) License. (CC-BY-NC-ND 4.0: https://creativecommons.org/licenses/by-nc-nd/4.0/)
spellingShingle Theriogenology
MIYAZAKI, Tamako
UENOYAMA, Reiko
MATSUZAKI, Takashi
YAMASHITA, Tetsuro
HIRATA, Toh-ichi
MIYAZAKI, Masao
Detection of urinary luteinizing hormone in Japanese black cows after administration of gonadotropin-releasing hormone
title Detection of urinary luteinizing hormone in Japanese black cows after administration of gonadotropin-releasing hormone
title_full Detection of urinary luteinizing hormone in Japanese black cows after administration of gonadotropin-releasing hormone
title_fullStr Detection of urinary luteinizing hormone in Japanese black cows after administration of gonadotropin-releasing hormone
title_full_unstemmed Detection of urinary luteinizing hormone in Japanese black cows after administration of gonadotropin-releasing hormone
title_short Detection of urinary luteinizing hormone in Japanese black cows after administration of gonadotropin-releasing hormone
title_sort detection of urinary luteinizing hormone in japanese black cows after administration of gonadotropin-releasing hormone
topic Theriogenology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8025431/
https://www.ncbi.nlm.nih.gov/pubmed/33455959
http://dx.doi.org/10.1292/jvms.20-0506
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