Thermoregulation of male sheep of indigenous or exotic breeds in a tropical environment

Pantoja, Messy Hannear de Andrade; Esteves, S. N.; Jacinto, M. A. C.; Pezzopane, José Ricardo Macedo; Paz, Cláudia Cristina Paro de; Silva, Jamile Andréa Rodrigues da; Lourenço, J. de B.; Brandão, Felipe Zandonadi; Moura, Ana Beatriz Bossois; Romanello, Narian; Botta, Daniela; Garcia, Alexandre Rossetto

doi:10.1016/j.jtherbio.2017.09.002

Cited by 43 publications

(24 citation statements)

References 48 publications

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“…T4 plays an important role in the animal’s adaptation to environmental changes; it is associated with the basal metabolic rate, glucose utilization, lipid metabolism, and neural functions [56,57]. Normally, the T4 level will decrease under chronic heat stress, trying to reduce the basal metabolism and body temperature [58,59]. However, due to the above reason, the internal environment of the animals sampled in autumn may be disturbed and cause an imbalance of blood biochemicals, resulting in the significant lower level of T4 in the WHSHS group.…”

Section: Discussionmentioning

confidence: 99%

Heat Stress-Responsive Transcriptome Analysis in the Liver Tissue of Hu Sheep

Kong

Deng

et al. 2019

Genes

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Heat stress has a severe effect on animal health and can reduce the productivity and reproductive efficiency; it is therefore necessary to explore the molecular mechanism involved in heat stress response, which is helpful for the cultivation of an animal breed with resistance to heat stress. However, little research about heat stress-responsive molecular analysis has been reported in sheep. Therefore, in this study, RNA sequencing (RNA-Seq) was used to investigate the transcriptome profiling in the liver of Hu sheep with and without heat stress. In total, we detected 520 and 22 differentially expressed mRNAs and lncRNAs, respectively. The differentially expressed mRNAs were mainly associated with metabolic processes, the regulation of biosynthetic processes, and the regulation of glucocorticoid; additionally, they were significantly enriched in the heat stress related pathways, including the carbon metabolism, the PPAR signaling pathway, and vitamin digestion and absorption. The co-located differentially expressed lncRNA Lnc_001782 might positively influence the expression of the corresponding genes APOA4 and APOA5, exerting co-regulative effects on the liver function. Thus, we made the hypothesis that Lnc_001782, APOA4 and APOA5 might function synergistically to regulate the anti-heat stress ability in Hu sheep. This study provides a catalog of Hu sheep liver mRNAs and lncRNAs, and will contribute to a better understanding of the molecular mechanism underlying heat stress responses.

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Section: Discussionmentioning

confidence: 99%

Heat Stress-Responsive Transcriptome Analysis in the Liver Tissue of Hu Sheep

Kong

Deng

et al. 2019

Genes

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“…T 3 is a type of thyroid hormone that works on anabolism and catabolism. The reduction in secretion of T 3 is considered to reflect an animal’s efforts to reduce its body heat production and accumulation as well as to maintain its body heat balance [1,19]. T 4 also plays an important role in the adaptation of animals to environmental changes.…”

Section: Discussionmentioning

confidence: 99%

“…Long-term high temperatures and excessively warm weather generate serious heat stress for animals. Heat stress directly or indirectly affects animal physiology, production, and health, among others [1,2,3], which is manifested by physiological features such as gasping for breath, accelerated respiration, elevated heart rate, rising rectal temperature, increasing in-vivo oxidative metabolism, and water and electrolyte disturbance [4,5,6,7]. Regarding reproduction, it can also cause reduced food intake, weight loss, and declining fertility [8,9,10], as well as declining immunity and disease resistance [11,12].…”

Section: Introductionmentioning

confidence: 99%

Transcriptomic Analysis Provides Novel Insights into Heat Stress Responses in Sheep

Chu

et al. 2019

Animals

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With the intensified and large-scale development of sheep husbandry and global warming, sheep heat stress has become an increasingly important issue. However, little is known about the molecular mechanisms related to sheep responses to heat stress. In this study, transcriptomic analysis of liver tissues of sheep in the presence and absence of heat stress was conducted, with the goal of identifying genes and pathways related to regulation when under such stress. After a comparison with the sheep reference genome, 440,226,436 clean reads were obtained from eight libraries. A p-value ≤ 0.05 and fold change ≥ 2 were taken as thresholds for categorizing differentially expressed genes, of which 1137 were identified. The accuracy and reliability of the RNA-Seq results were confirmed by qRT-PCR. The identified differentially expressed genes were significantly associated with 419 GO terms and 51 KEGG pathways, which suggested their participation in biological processes such as response to stress, immunoreaction, and fat metabolism. This study’s results provide a comprehensive overview of sheep heat stress-induced transcriptional expression patterns, laying a foundation for further analysis of the molecular mechanisms of sheep heat stress.

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“…The camera was positioned perpendicular to the right antimere of the animal at a distance of approximately 5.0 m 31 . To calculate the back line temperature (°C), individual images of all heifers from each system were used and the mean was determined using a linear tracing of the scapula to the iliac crest 60 . The analysis of the thermograms was done using the IRSoft software, version 4.0 (Testo AG, Lenzkirch, Germany; https://www.testo.com/en/products/thermography-irsoft ).…”

Section: Methodsmentioning

confidence: 99%

Silvopastoral system is an alternative to improve animal welfare and productive performance in meat production systems

Lemes

Garcia

Pezzopane

et al. 2021

Sci Rep

Self Cite

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Climate change is a reality and global surface temperature is projected to rise substantially in the next 80 years. Agriculture practices will have to adapt to climate change, and also help to mitigate this effect using, among other strategies, forest conservation and management. Silvopastoral systems have been adopted in tropical climate livestock areas but their benefits on thermal comfort and reproductive performance of beef cows are not completely known. Therefore, our aims were to compare the microclimate of silvopastoral and intensive rotational unshaded grazing systems in different months and to evaluate physiological variables (Exp. 1 and 2), metabolism, and in vitro embryo production (Exp. 2) in crossbred beef females. Our hypothesis is that the silvopastoral system can improve the thermal comfort of beef heifers and cows and, consequently, also improve dry matter intake, body weight gain, and in vitro embryo production when compared to the unshaded rotational grazing system. In Exp 1, the silvopastoral system decreased body temperature and increased welfare and performance of heifers. In Exp. 2, the silvopastoral system enhanced the body weight but did not affect metabolism and the general reproductive performance, but increased the recovery rate of oocytes in primiparous cows.

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Thermoregulation of male sheep of indigenous or exotic breeds in a tropical environment

Cited by 43 publications

References 48 publications

Heat Stress-Responsive Transcriptome Analysis in the Liver Tissue of Hu Sheep

Heat Stress-Responsive Transcriptome Analysis in the Liver Tissue of Hu Sheep

Transcriptomic Analysis Provides Novel Insights into Heat Stress Responses in Sheep

Silvopastoral system is an alternative to improve animal welfare and productive performance in meat production systems

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