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פותח על ידי קלירמאש פתרונות בע"מ -
Liver proteomic analysis of postpartum Holstein cows exposed to heat stress or cooling conditions during the dry period
Year:
2018
Source of publication :
Journal of Dairy Science
Authors :
זכות, מאיה
;
.
Volume :
101
Co-Authors:
Skibiel, A.L., Department of Animal Sciences, University of Florida, Gainesville 32611
Zachut, M., Department of Ruminant Sciences, Institute of Animal Science, ARO Volcani Center, Rishon Lezion, Israel, 7505101
do Amaral, B.C., Department of Animal Sciences, University of Florida, Gainesville 32611
Levin, Y., The Nancy and Stephen Grand Israel National Center for Personalized Medicine, Weizmann Institute of Science, Rehovot, Israel, 7610001
Dahl, G.E., Department of Animal Sciences, University of Florida, Gainesville 32611
Facilitators :
From page:
705
To page:
716
(
Total pages:
12
)
Abstract:
Heat stress negatively affects cow performance, compromises immune function, and increases susceptibility to metabolic disorders, particularly during the dry period and as cows transition from gestation to lactation. Metabolic adaptations of the liver are critical for successful transition, yet it is unclear how heat stress affects metabolic pathways within the liver at the proteomic level. The objective of this study was to investigate the liver proteome of postpartum cows that were cooled or heat stressed during the dry period to gain insight into how protein expression is altered by prior heat stress and may contribute to performance and disease outcomes. During the dry period, cows were either housed in shaded barns with fans and water soakers [cooled group (CL); n = 5] or in shaded barns lacking these cooling devices [heat-stressed group (HT); n = 5]. Liver biopsies were collected at 2 d postpartum, and protein content was analyzed by label-free quantitative shotgun proteomics (nanoscale liquid chromatography coupled to tandem mass spectrometry). In the most comprehensive bovine liver proteomics analysis completed to date, we identified 3,270 proteins, 75 of which were differentially expressed between HT and CL cows (fold change ±1.2). The top pathways differing between HT and CL cows were oxidative phosphorylation, mitochondrial dysfunction, farnesoid X receptor/retinoid X receptor (FXR/RXR) activation, and the methylmalonyl pathway. Cooling cows during the dry period likely improves ATP production, reduces oxidative stress, and prevents excessive accumulation of hepatic triglycerides and cholesterol, which may contribute to greater milk yield and lower susceptibility to transition-related diseases. © 2018 American Dairy Science Association.
Note:
Related Files :
mitochondria
Oxidative phosphorylation
oxidative stress
Transition
עוד תגיות
תוכן קשור
More details
DOI :
10.3168/jds.2017-13258
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
28394
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:38
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Scientific Publication
Liver proteomic analysis of postpartum Holstein cows exposed to heat stress or cooling conditions during the dry period
101
Skibiel, A.L., Department of Animal Sciences, University of Florida, Gainesville 32611
Zachut, M., Department of Ruminant Sciences, Institute of Animal Science, ARO Volcani Center, Rishon Lezion, Israel, 7505101
do Amaral, B.C., Department of Animal Sciences, University of Florida, Gainesville 32611
Levin, Y., The Nancy and Stephen Grand Israel National Center for Personalized Medicine, Weizmann Institute of Science, Rehovot, Israel, 7610001
Dahl, G.E., Department of Animal Sciences, University of Florida, Gainesville 32611
Liver proteomic analysis of postpartum Holstein cows exposed to heat stress or cooling conditions during the dry period
Heat stress negatively affects cow performance, compromises immune function, and increases susceptibility to metabolic disorders, particularly during the dry period and as cows transition from gestation to lactation. Metabolic adaptations of the liver are critical for successful transition, yet it is unclear how heat stress affects metabolic pathways within the liver at the proteomic level. The objective of this study was to investigate the liver proteome of postpartum cows that were cooled or heat stressed during the dry period to gain insight into how protein expression is altered by prior heat stress and may contribute to performance and disease outcomes. During the dry period, cows were either housed in shaded barns with fans and water soakers [cooled group (CL); n = 5] or in shaded barns lacking these cooling devices [heat-stressed group (HT); n = 5]. Liver biopsies were collected at 2 d postpartum, and protein content was analyzed by label-free quantitative shotgun proteomics (nanoscale liquid chromatography coupled to tandem mass spectrometry). In the most comprehensive bovine liver proteomics analysis completed to date, we identified 3,270 proteins, 75 of which were differentially expressed between HT and CL cows (fold change ±1.2). The top pathways differing between HT and CL cows were oxidative phosphorylation, mitochondrial dysfunction, farnesoid X receptor/retinoid X receptor (FXR/RXR) activation, and the methylmalonyl pathway. Cooling cows during the dry period likely improves ATP production, reduces oxidative stress, and prevents excessive accumulation of hepatic triglycerides and cholesterol, which may contribute to greater milk yield and lower susceptibility to transition-related diseases. © 2018 American Dairy Science Association.
Scientific Publication
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