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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... Full description

Journal Title: Asian-Australasian Journal of Animal Sciences 01 June 2019, Vol.32(6), pp.842-848
Main Author: Guofeng Han
Other Authors: Hui Yang , Yunhao Wang , Shogo Haraguchi , Takuro Miyazaki , Takashi Bungo , Kosuke Tashiro , Mitsuhiro Furuse , Vishwajit S. Chowdhury
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 1011-2367 ; E-ISSN: 1976-5517 ; DOI: 10.5713/ajas.18.0677
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title: L-Leucine increases the daily body temperature and affords thermotolerance in broiler chicks
format: Article
creator:
  • Guofeng Han
  • Hui Yang
  • Yunhao Wang
  • Shogo Haraguchi
  • Takuro Miyazaki
  • Takashi Bungo
  • Kosuke Tashiro
  • Mitsuhiro Furuse
  • Vishwajit S. Chowdhury
subjects:
  • L-Leucine
  • Chicks
  • Heat Stress
  • Rectal Temperature
  • Thermotolerance
  • Agriculture
ispartof: Asian-Australasian Journal of Animal Sciences, 01 June 2019, Vol.32(6), pp.842-848
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.
language: eng
source:
identifier: ISSN: 1011-2367 ; E-ISSN: 1976-5517 ; DOI: 10.5713/ajas.18.0677
fulltext: fulltext_linktorsrc
issn:
  • 1011-2367
  • 10112367
  • 1976-5517
  • 19765517
url: Link


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titleL-Leucine increases the daily body temperature and affords thermotolerance in broiler chicks
creatorGuofeng Han ; Hui Yang ; Yunhao Wang ; Shogo Haraguchi ; Takuro Miyazaki ; Takashi Bungo ; Kosuke Tashiro ; Mitsuhiro Furuse ; Vishwajit S. Chowdhury
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subjectL-Leucine ; Chicks ; Heat Stress ; Rectal Temperature ; Thermotolerance ; Agriculture
descriptionObjective 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.
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titleL-Leucine increases the daily body temperature and affords thermotolerance in broiler chicks
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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.

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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.

pubAsian-Australasian Association of Animal Production Societies
doi10.5713/ajas.18.0677
oafree_for_read
date2019-06-01