L-Leucine increases the daily body temperature and affords thermotolerance in broiler chicks
Objective Heat stress poses an increasing threat for poultry production. Some amino acids have been found to play critical roles in affording thermotolerance. Recently, it was found that in ovo administration of L-leucine (L-Leu) altered amino acid metabolism and afforded thermotolerance in heat-exp...
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doaj-0a500fec48164170ae7ba26e119d94d42020-11-25T02:20:46ZengAsian-Australasian Association of Animal Production SocietiesAsian-Australasian Journal of Animal Sciences1011-23671976-55172019-06-0132684284810.5713/ajas.18.067724127L-Leucine increases the daily body temperature and affords thermotolerance in broiler chicksGuofeng Han0Hui Yang1Yunhao Wang2Shogo Haraguchi3Takuro Miyazaki4Takashi Bungo5Kosuke Tashiro6Mitsuhiro Furuse7Vishwajit S. Chowdhury8 Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka 819-0395, Japan Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka 819-0395, Japan Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka 819-0395, Japan Department of Biochemistry, Showa University School of Medicine, Tokyo 152-8555, Japan Department of Biochemistry, Showa University School of Medicine, Tokyo 152-8555, Japan Department of Bioresource Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan Department of Molecular Biosciences, Faculty of Agriculture, Kyushu University, Fukuoka 819-0395, Japan Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka 819-0395, Japan Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka 819-0395, JapanObjective Heat stress poses an increasing threat for poultry production. Some amino acids have been found to play critical roles in affording thermotolerance. Recently, it was found that in ovo administration of L-leucine (L-Leu) altered amino acid metabolism and afforded thermotolerance in heat-exposed broiler chicks. Methods In this study, two doses (35 and 70 μmol/egg) of L-Leu were administered in ovo on embryonic day 7 to determine their effect on rectal temperature (RT), body weight (BW) and thyroid hormones at hatching. Changes in RT, BW, and thermotolerance in post-hatched chicks were also analyzed. Results It was found that in ovo administration of L-Leu dose-dependently reduced RT and plasma thyroxine (T4) level just after hatching. In post-hatched neonatal broiler chicks, however, the higher dose of L-Leu administered in ovo significantly increased RT without affecting BW gain. In chicks that had been exposed to heat stress, the RT was significantly lowered by in ovo administration of L-Leu (high dose) in comparison with the control chicks under the same high ambient temperature (HT: 35°C±1°C, 120 min). Conclusion In ovo administration of L-Leu in a high dose contributed to an increased daily body temperature and afforded thermotolerance under HT in neonatal broiler chicks.http://www.ajas.info/upload/pdf/ajas-18-0677.pdfL-leucineChicksHeat StressRectal TemperatureThermotolerance |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Guofeng Han Hui Yang Yunhao Wang Shogo Haraguchi Takuro Miyazaki Takashi Bungo Kosuke Tashiro Mitsuhiro Furuse Vishwajit S. Chowdhury |
spellingShingle |
Guofeng Han Hui Yang Yunhao Wang Shogo Haraguchi Takuro Miyazaki Takashi Bungo Kosuke Tashiro Mitsuhiro Furuse Vishwajit S. Chowdhury L-Leucine increases the daily body temperature and affords thermotolerance in broiler chicks Asian-Australasian Journal of Animal Sciences L-leucine Chicks Heat Stress Rectal Temperature Thermotolerance |
author_facet |
Guofeng Han Hui Yang Yunhao Wang Shogo Haraguchi Takuro Miyazaki Takashi Bungo Kosuke Tashiro Mitsuhiro Furuse Vishwajit S. Chowdhury |
author_sort |
Guofeng Han |
title |
L-Leucine increases the daily body temperature and affords thermotolerance in broiler chicks |
title_short |
L-Leucine increases the daily body temperature and affords thermotolerance in broiler chicks |
title_full |
L-Leucine increases the daily body temperature and affords thermotolerance in broiler chicks |
title_fullStr |
L-Leucine increases the daily body temperature and affords thermotolerance in broiler chicks |
title_full_unstemmed |
L-Leucine increases the daily body temperature and affords thermotolerance in broiler chicks |
title_sort |
l-leucine increases the daily body temperature and affords thermotolerance in broiler chicks |
publisher |
Asian-Australasian Association of Animal Production Societies |
series |
Asian-Australasian Journal of Animal Sciences |
issn |
1011-2367 1976-5517 |
publishDate |
2019-06-01 |
description |
Objective Heat stress poses an increasing threat for poultry production. Some amino acids have been found to play critical roles in affording thermotolerance. Recently, it was found that in ovo administration of L-leucine (L-Leu) altered amino acid metabolism and afforded thermotolerance in heat-exposed broiler chicks. Methods In this study, two doses (35 and 70 μmol/egg) of L-Leu were administered in ovo on embryonic day 7 to determine their effect on rectal temperature (RT), body weight (BW) and thyroid hormones at hatching. Changes in RT, BW, and thermotolerance in post-hatched chicks were also analyzed. Results It was found that in ovo administration of L-Leu dose-dependently reduced RT and plasma thyroxine (T4) level just after hatching. In post-hatched neonatal broiler chicks, however, the higher dose of L-Leu administered in ovo significantly increased RT without affecting BW gain. In chicks that had been exposed to heat stress, the RT was significantly lowered by in ovo administration of L-Leu (high dose) in comparison with the control chicks under the same high ambient temperature (HT: 35°C±1°C, 120 min). Conclusion In ovo administration of L-Leu in a high dose contributed to an increased daily body temperature and afforded thermotolerance under HT in neonatal broiler chicks. |
topic |
L-leucine Chicks Heat Stress Rectal Temperature Thermotolerance |
url |
http://www.ajas.info/upload/pdf/ajas-18-0677.pdf |
work_keys_str_mv |
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