Huiyuan Rui , Xiangyang Xu , Fei Song , Aige Han , Meiwei Lv , Xin Kang , Ming Ge , Xiaowen Jiang , Wenhui Yu
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引用次数: 0
Abstract
Heat stress (HS) has severely restricted the growth and yield of poultry. Reversal light-dark cycles (RLD) are a low-cost and highly effective method to regulate circadian rhythms. However, current studies have not demonstrated whether this method can improve the intestinal injury induced by HS in broilers. This research collected the intestinal tissues, and the experiment was carried out by HE staining, molecular biology, 16S rRNA sequencing, and other methods. Our results show that HS not only hinders the growth and development of broilers but also leads to increased stress levels in the body and impairs intestinal function. RLD treatment increased significantly the body weight of broilers, alleviated oxidative stress caused by HS, promoted the release of melatonin, as well as reduced the expression of cortisol and heat shock protein 70. RLD also induced increased gene and protein expression of tight junction proteins and clock genes, and altered the structure of the cecal microbial community by increasing the abundance of Enterococcus faecalis, Lactobacillus, and Bacteroidetes. Furthermore, the activities of intestinal digestive enzymes and absorption enzymes were significantly improved. In conclusion, RLD improves the growth performance of broilers under HS conditions by reducing the stress response and protecting intestinal function.
期刊介绍:
The Journal of Thermal Biology publishes articles that advance our knowledge on the ways and mechanisms through which temperature affects man and animals. This includes studies of their responses to these effects and on the ecological consequences. Directly relevant to this theme are:
• The mechanisms of thermal limitation, heat and cold injury, and the resistance of organisms to extremes of temperature
• The mechanisms involved in acclimation, acclimatization and evolutionary adaptation to temperature
• Mechanisms underlying the patterns of hibernation, torpor, dormancy, aestivation and diapause
• Effects of temperature on reproduction and development, growth, ageing and life-span
• Studies on modelling heat transfer between organisms and their environment
• The contributions of temperature to effects of climate change on animal species and man
• Studies of conservation biology and physiology related to temperature
• Behavioural and physiological regulation of body temperature including its pathophysiology and fever
• Medical applications of hypo- and hyperthermia
Article types:
• Original articles
• Review articles