PMID- 30215744
OWN - NLM
STAT- MEDLINE
DCOM- 20190221
LR  - 20191204
IS  - 1525-3163 (Electronic)
IS  - 0021-8812 (Print)
IS  - 0021-8812 (Linking)
VI  - 96
IP  - 12
DP  - 2018 Dec 3
TI  - Effects of constant or intermittent high temperature on egg production, feed 
      intake, and hypothalamic expression of antioxidant and pro-oxidant enzymes genes 
      in laying ducks.
PG  - 5064-5074
LID - 10.1093/jas/sky355 [doi]
AB  - Heat stress is a major environmental factor contributing to lower production of 
      poultry. The objective of present study was to evaluate the influence of constant 
      or intermittent high temperature on the production performance and redox status 
      of plasma and hypothalamus in laying ducks. A total of 288 weight- and 
      laying-matched laying ducks were randomly assigned to 1 of 4 treatments (each 
      with 6 replicates of 12 birds): control, pair-fed, constant high temperature (24 
      h, 34 +/- 1 degrees C), and intermittent high temperature (10 h, 34 +/- 1 degrees C). Blood and 
      hypothalamic tissue samples were collected on days 1, 21, and 55 to determine 
      redox status. Average daily feed intake and egg weight was reduced (P < 0.001) 
      during imposition of both high-temperature treatments but was not different (P > 
      0.05) among the treatments during the recovery period. Lower (P < 0.05) egg mass 
      was observed in pair-fed and intermittent high-temperature treatment during 
      high-temperature period and in constant high temperature during the recovery 
      period. Haugh units from high temperature-treated ducks were significantly lower 
      than those from control or pair-fed ducks (P < 0.05) during the high-temperature 
      period. Both models of heat exposure decreased plasma concentrations of 
      glutathione (GSH) at day 1, and constant high temperature decreased plasma 
      activity of GSH peroxidase (GSH-PX) at day 21 (P < 0.05). Hypothalamic expression 
      of antioxidant genes GSH reductase (GR) and mitochondrial NADH dehydrogenase 
      subunit (Complex Iota) were decreased by both high-temperature treatments at day 1. 
      Hypothalamic expression of genes for pro-oxidant enzymes cyclooxygenase-2 
      (COX-2), 5-lipoxygenase (5-LOX), and cytochrome P450 7A1 (CYP7A1) were decreased 
      (P < 0.05) by both models of high temperature but transcripts of cyclooxygenase-1 
      (COX-1) of ducks that were pair-fed or were exposed to constant high temperature 
      were increased at day 21. The transcripts of NADPH oxidase 1 (NOX-1) were 
      decreased at day 1 by both high-temperature treatments (P < 0.05) but increased 
      during the recovery period. These results indicate that, for laying ducks, 
      intermittent high temperature caused much greater negative production performance 
      effects than constant high temperature during high-temperature period, but laying 
      ducks exposed to constant high temperature tend to take longer to recover their 
      production performance. High-temperature stress, either constant or intermittent, 
      altered hypothalamic expression of antioxidation and pro-oxidation genes.
FAU - Luo, Xi
AU  - Luo X
AD  - Institute of Animal Science, Guangdong Academy of Agricultural Sciences, 
      Guangzhou, China.
AD  - State Key Laboratory of Livestock and Poultry Breeding, Guangzhou, China.
AD  - Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of 
      Agriculture, Guangzhou, China.
AD  - Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
AD  - Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
FAU - Zheng, Chuntian
AU  - Zheng C
AD  - Institute of Animal Science, Guangdong Academy of Agricultural Sciences, 
      Guangzhou, China.
AD  - State Key Laboratory of Livestock and Poultry Breeding, Guangzhou, China.
AD  - Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of 
      Agriculture, Guangzhou, China.
AD  - Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
AD  - Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
FAU - Xia, Weiguang
AU  - Xia W
AD  - Institute of Animal Science, Guangdong Academy of Agricultural Sciences, 
      Guangzhou, China.
AD  - State Key Laboratory of Livestock and Poultry Breeding, Guangzhou, China.
AD  - Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of 
      Agriculture, Guangzhou, China.
AD  - Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
AD  - Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
FAU - Ruan, Dong
AU  - Ruan D
AD  - Institute of Animal Science, Guangdong Academy of Agricultural Sciences, 
      Guangzhou, China.
AD  - State Key Laboratory of Livestock and Poultry Breeding, Guangzhou, China.
AD  - Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of 
      Agriculture, Guangzhou, China.
AD  - Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
AD  - Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
FAU - Wang, Shuang
AU  - Wang S
AD  - Institute of Animal Science, Guangdong Academy of Agricultural Sciences, 
      Guangzhou, China.
AD  - State Key Laboratory of Livestock and Poultry Breeding, Guangzhou, China.
AD  - Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of 
      Agriculture, Guangzhou, China.
AD  - Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
AD  - Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
FAU - Cui, Yiyan
AU  - Cui Y
AD  - Institute of Animal Science, Guangdong Academy of Agricultural Sciences, 
      Guangzhou, China.
AD  - State Key Laboratory of Livestock and Poultry Breeding, Guangzhou, China.
AD  - Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of 
      Agriculture, Guangzhou, China.
AD  - Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
AD  - Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
FAU - Yu, Deqian
AU  - Yu D
AD  - Institute of Animal Science, Guangdong Academy of Agricultural Sciences, 
      Guangzhou, China.
AD  - State Key Laboratory of Livestock and Poultry Breeding, Guangzhou, China.
AD  - Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of 
      Agriculture, Guangzhou, China.
AD  - Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
AD  - Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
FAU - Wu, Qiwen
AU  - Wu Q
AD  - Institute of Animal Science, Guangdong Academy of Agricultural Sciences, 
      Guangzhou, China.
AD  - State Key Laboratory of Livestock and Poultry Breeding, Guangzhou, China.
AD  - Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of 
      Agriculture, Guangzhou, China.
AD  - Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
AD  - Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
FAU - Huang, Danhong
AU  - Huang D
AD  - Institute of Animal Science, Guangdong Academy of Agricultural Sciences, 
      Guangzhou, China.
AD  - State Key Laboratory of Livestock and Poultry Breeding, Guangzhou, China.
AD  - Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of 
      Agriculture, Guangzhou, China.
AD  - Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
AD  - Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
FAU - Zhang, Yanan
AU  - Zhang Y
AD  - Institute of Animal Science, Guangdong Academy of Agricultural Sciences, 
      Guangzhou, China.
AD  - State Key Laboratory of Livestock and Poultry Breeding, Guangzhou, China.
AD  - Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of 
      Agriculture, Guangzhou, China.
AD  - Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
AD  - Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
FAU - Chen, Wei
AU  - Chen W
AD  - Institute of Animal Science, Guangdong Academy of Agricultural Sciences, 
      Guangzhou, China.
AD  - State Key Laboratory of Livestock and Poultry Breeding, Guangzhou, China.
AD  - Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of 
      Agriculture, Guangzhou, China.
AD  - Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
AD  - Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangzhou, China.
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Anim Sci
JT  - Journal of animal science
JID - 8003002
RN  - 0 (Antioxidants)
RN  - 0 (Oxidants)
RN  - 0 (Reactive Oxygen Species)
SB  - IM
MH  - Animals
MH  - Antioxidants/metabolism
MH  - Ducks/*physiology
MH  - *Eating
MH  - Female
MH  - Gene Expression Regulation, Enzymologic
MH  - *Hot Temperature
MH  - Hypothalamus/*metabolism
MH  - *Oviposition
MH  - Oxidants
MH  - *Reactive Oxygen Species
MH  - Time Factors
PMC - PMC6276560
EDAT- 2018/09/15 06:00
MHDA- 2019/02/23 06:00
PMCR- 2019/12/03
CRDT- 2018/09/15 06:00
PHST- 2018/05/23 00:00 [received]
PHST- 2018/09/05 00:00 [accepted]
PHST- 2018/09/15 06:00 [pubmed]
PHST- 2019/02/23 06:00 [medline]
PHST- 2018/09/15 06:00 [entrez]
PHST- 2019/12/03 00:00 [pmc-release]
AID - 5095302 [pii]
AID - sky355 [pii]
AID - 10.1093/jas/sky355 [doi]
PST - ppublish
SO  - J Anim Sci. 2018 Dec 3;96(12):5064-5074. doi: 10.1093/jas/sky355.