論文

基本情報

氏名 大内 義光
氏名(カナ) オオウチ ヨシミツ
氏名(英語) Ouchi Yoshimitsu
所属 獣医学部 獣医保健看護学科
職名 助教
researchmap研究者コード R000035739
researchmap機関 岡山理科大学

題名

Effects of Thermal Conditioning on Changes in Hepatic and Muscular Tissue Associated With Reduced Heat Production and Body Temperature in Young Chickens

単著・共著の別

 

著者

Yoshimitsu Ouchi
Vishwajit S. Chowdhury
John F. Cockrem
Takashi Bungo

概要

Effects of increased summer temperatures on poultry production are becoming more pronounced due to global warming, so it is important to consider approaches that might reduce heat stress in chickens. Thermal conditioning in chickens in the neonatal period can improve thermotolerance and reduce body temperature increases when birds are exposed to high ambient temperature later in life. The objective of this study was to investigate physiological and molecular changes associated with heat production and hence body temperature regulation under high ambient temperatures in thermally conditioned chicks. Three-day-old broiler chicks (Chunky) were thermally conditioned by exposure to a high ambient temperature (40°C) for 12 h while control chicks were kept at 30°C. Four days after the treatment, both groups were exposed to 40°C for 15 or 90 min. The increase in rectal temperature during 90 min of exposure to a high ambient temperature was less in thermally conditioned than control chicks. At 15-min of re-exposure treatment, gene expression for uncoupling protein and carnitine palmitoyletransferase 1, key molecules in thermogenesis and fatty acid oxidation, were significantly higher in pectoral muscle of control chicks but not conditioned chicks. Hepatic argininosuccinate synthase (ASS) decreased and hepatic argininosuccinate lyase (ASL) increased after reexposure to a high temperature. The concentrations of hepatic arginosuccinic acid, and ASS and ASL expression, were upregulated in conditioned chicks compared with the control chicks, indicating activity of the urea cycle could be enhanced to trap more energy to reduce heat production in conditioned chicks. These results suggest thermal conditioning can reduce the increase in heat production in muscles of chickens that occurs in high ambient temperatures to promote sensible heat loss. Conditioning may also promote energy trapping process in the liver by altering the heat production system, resulting in an alleviation of the excessive rise of body temperature.

発表雑誌等の名称

Frontiers in Veterinary Science

出版者

Frontiers Media SA

7

 

開始ページ

 

終了ページ

 

発行又は発表の年月

2021-01-18

査読の有無

有り

招待の有無

 

記述言語

 

掲載種別

研究論文(学術雑誌)

ISSN

 

ID:DOI

10.3389/fvets.2020.610319

ID:NAID(CiNiiのID)

 

ID:PMID

 

JGlobalID

 

arXiv ID

 

ORCIDのPut Code

 

DBLP ID