Cargando…
Blood amino acids profile responding to heat stress in dairy cows
OBJECTIVE: The objective of this experiment was to investigate the effects of heat stress on milk protein and blood amino acid profile in dairy cows. METHODS: Twelve dairy cows with the similar parity, days in milk and milk yield were randomly divided into two groups with six cows raised in summer a...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Asian-Australasian Association of Animal Production Societies (AAAP) and Korean Society of Animal Science and Technology (KSAST)
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5756923/ https://www.ncbi.nlm.nih.gov/pubmed/28231695 http://dx.doi.org/10.5713/ajas.16.0428 |
_version_ | 1783290797703036928 |
---|---|
author | Guo, Jiang Gao, Shengtao Quan, Suyu Zhang, Yangdong Bu, Dengpan Wang, Jiaqi |
author_facet | Guo, Jiang Gao, Shengtao Quan, Suyu Zhang, Yangdong Bu, Dengpan Wang, Jiaqi |
author_sort | Guo, Jiang |
collection | PubMed |
description | OBJECTIVE: The objective of this experiment was to investigate the effects of heat stress on milk protein and blood amino acid profile in dairy cows. METHODS: Twelve dairy cows with the similar parity, days in milk and milk yield were randomly divided into two groups with six cows raised in summer and others in autumn, respectively. Constant managerial conditions and diets were maintained during the experiment. Measurements and samples for heat stress and no heat stress were obtained according to the physical alterations of the temperature-humidity index. RESULTS: Results showed that heat stress significantly reduced the milk protein content (p<0.05). Heat stress tended to decrease milk yield (p = 0.09). Furthermore, heat stress decreased dry matter intake, the concentration of blood glucose and insulin, and glutathione peroxidase activity, while increased levels of non-esterified fatty acid and malondialdehyde (p<0.05). Additionally, the concentrations of blood Thr involved in immune response were increased under heat stress (p<0.05). The concentration of blood Ala, Glu, Asp, and Gly, associated with gluconeogenesis, were also increased under heat stress (p<0.05). However, the concentration of blood Lys that promotes milk protein synthesis was decreased under heat stress (p<0.05). CONCLUSION: In conclusion, this study revealed that more amino acids were required for maintenance but not for milk protein synthesis under heat stress, and the decreased availability of amino acids for milk protein synthesis may be attributed to competition of immune response and gluconeogenesis. |
format | Online Article Text |
id | pubmed-5756923 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Asian-Australasian Association of Animal Production Societies (AAAP) and Korean Society of Animal Science and Technology (KSAST) |
record_format | MEDLINE/PubMed |
spelling | pubmed-57569232018-01-12 Blood amino acids profile responding to heat stress in dairy cows Guo, Jiang Gao, Shengtao Quan, Suyu Zhang, Yangdong Bu, Dengpan Wang, Jiaqi Asian-Australas J Anim Sci Article OBJECTIVE: The objective of this experiment was to investigate the effects of heat stress on milk protein and blood amino acid profile in dairy cows. METHODS: Twelve dairy cows with the similar parity, days in milk and milk yield were randomly divided into two groups with six cows raised in summer and others in autumn, respectively. Constant managerial conditions and diets were maintained during the experiment. Measurements and samples for heat stress and no heat stress were obtained according to the physical alterations of the temperature-humidity index. RESULTS: Results showed that heat stress significantly reduced the milk protein content (p<0.05). Heat stress tended to decrease milk yield (p = 0.09). Furthermore, heat stress decreased dry matter intake, the concentration of blood glucose and insulin, and glutathione peroxidase activity, while increased levels of non-esterified fatty acid and malondialdehyde (p<0.05). Additionally, the concentrations of blood Thr involved in immune response were increased under heat stress (p<0.05). The concentration of blood Ala, Glu, Asp, and Gly, associated with gluconeogenesis, were also increased under heat stress (p<0.05). However, the concentration of blood Lys that promotes milk protein synthesis was decreased under heat stress (p<0.05). CONCLUSION: In conclusion, this study revealed that more amino acids were required for maintenance but not for milk protein synthesis under heat stress, and the decreased availability of amino acids for milk protein synthesis may be attributed to competition of immune response and gluconeogenesis. Asian-Australasian Association of Animal Production Societies (AAAP) and Korean Society of Animal Science and Technology (KSAST) 2018-01 2017-02-23 /pmc/articles/PMC5756923/ /pubmed/28231695 http://dx.doi.org/10.5713/ajas.16.0428 Text en Copyright © 2018 by Asian-Australasian Journal of Animal Sciences This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Article Guo, Jiang Gao, Shengtao Quan, Suyu Zhang, Yangdong Bu, Dengpan Wang, Jiaqi Blood amino acids profile responding to heat stress in dairy cows |
title | Blood amino acids profile responding to heat stress in dairy cows |
title_full | Blood amino acids profile responding to heat stress in dairy cows |
title_fullStr | Blood amino acids profile responding to heat stress in dairy cows |
title_full_unstemmed | Blood amino acids profile responding to heat stress in dairy cows |
title_short | Blood amino acids profile responding to heat stress in dairy cows |
title_sort | blood amino acids profile responding to heat stress in dairy cows |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5756923/ https://www.ncbi.nlm.nih.gov/pubmed/28231695 http://dx.doi.org/10.5713/ajas.16.0428 |
work_keys_str_mv | AT guojiang bloodaminoacidsprofilerespondingtoheatstressindairycows AT gaoshengtao bloodaminoacidsprofilerespondingtoheatstressindairycows AT quansuyu bloodaminoacidsprofilerespondingtoheatstressindairycows AT zhangyangdong bloodaminoacidsprofilerespondingtoheatstressindairycows AT budengpan bloodaminoacidsprofilerespondingtoheatstressindairycows AT wangjiaqi bloodaminoacidsprofilerespondingtoheatstressindairycows |