LH and testosterone secretions in response to GnRH challenge in pubertal Japanese Black beef bulls with normal and abnormal semen

Plasma luteinizing hormone (LH) and testosterone concentrations were examined in Japanese Black beef bulls with normal and abnormal semen in response to gonadotropin releasing hormone (GnRH) challenge at the start (10 months) and completion (20 months) of puberty. Bulls with normal semen had higher...

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Autores principales: SAKASE, Mitsuhiro, WEERAKOON, W. W. P. N., HANNAN, M. A., KOHAMA, Namiko, TAMADA, Hiromichi, KAWATE, Noritoshi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Japanese Society of Veterinary Science 2018
Materias:
Theriogenology
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6305509/
https://www.ncbi.nlm.nih.gov/pubmed/30298829
http://dx.doi.org/10.1292/jvms.18-0151
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author SAKASE, Mitsuhiro
WEERAKOON, W. W. P. N.
HANNAN, M. A.
KOHAMA, Namiko
TAMADA, Hiromichi
KAWATE, Noritoshi
author_facet SAKASE, Mitsuhiro
WEERAKOON, W. W. P. N.
HANNAN, M. A.
KOHAMA, Namiko
TAMADA, Hiromichi
KAWATE, Noritoshi
author_sort SAKASE, Mitsuhiro
collection PubMed
description Plasma luteinizing hormone (LH) and testosterone concentrations were examined in Japanese Black beef bulls with normal and abnormal semen in response to gonadotropin releasing hormone (GnRH) challenge at the start (10 months) and completion (20 months) of puberty. Bulls with normal semen had higher testosterone concentrations after GnRH treatment at 20 months than they did at 10 months, while LH concentrations did not differ between the two age groups. LH and testosterone concentrations were not different between bulls with normal and abnormal semen at 20 months. Thus, testosterone secretions in response to the GnRH challenge were higher for bulls with normal semen at pubertal completion compared to bulls at the start of puberty, but responsiveness of LH to GnRH and of testosterone to the LH increment was not altered in bulls with abnormal semen.
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spelling pubmed-63055092018-12-28 LH and testosterone secretions in response to GnRH challenge in pubertal Japanese Black beef bulls with normal and abnormal semen SAKASE, Mitsuhiro WEERAKOON, W. W. P. N. HANNAN, M. A. KOHAMA, Namiko TAMADA, Hiromichi KAWATE, Noritoshi J Vet Med Sci Theriogenology Plasma luteinizing hormone (LH) and testosterone concentrations were examined in Japanese Black beef bulls with normal and abnormal semen in response to gonadotropin releasing hormone (GnRH) challenge at the start (10 months) and completion (20 months) of puberty. Bulls with normal semen had higher testosterone concentrations after GnRH treatment at 20 months than they did at 10 months, while LH concentrations did not differ between the two age groups. LH and testosterone concentrations were not different between bulls with normal and abnormal semen at 20 months. Thus, testosterone secretions in response to the GnRH challenge were higher for bulls with normal semen at pubertal completion compared to bulls at the start of puberty, but responsiveness of LH to GnRH and of testosterone to the LH increment was not altered in bulls with abnormal semen. The Japanese Society of Veterinary Science 2018-10-08 2018-12 /pmc/articles/PMC6305509/ /pubmed/30298829 http://dx.doi.org/10.1292/jvms.18-0151 Text en ©2018 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
SAKASE, Mitsuhiro
WEERAKOON, W. W. P. N.
HANNAN, M. A.
KOHAMA, Namiko
TAMADA, Hiromichi
KAWATE, Noritoshi
LH and testosterone secretions in response to GnRH challenge in pubertal Japanese Black beef bulls with normal and abnormal semen
title LH and testosterone secretions in response to GnRH challenge in pubertal Japanese Black beef bulls with normal and abnormal semen
title_full LH and testosterone secretions in response to GnRH challenge in pubertal Japanese Black beef bulls with normal and abnormal semen
title_fullStr LH and testosterone secretions in response to GnRH challenge in pubertal Japanese Black beef bulls with normal and abnormal semen
title_full_unstemmed LH and testosterone secretions in response to GnRH challenge in pubertal Japanese Black beef bulls with normal and abnormal semen
title_short LH and testosterone secretions in response to GnRH challenge in pubertal Japanese Black beef bulls with normal and abnormal semen
title_sort lh and testosterone secretions in response to gnrh challenge in pubertal japanese black beef bulls with normal and abnormal semen
topic Theriogenology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6305509/
https://www.ncbi.nlm.nih.gov/pubmed/30298829
http://dx.doi.org/10.1292/jvms.18-0151
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