Erika Eckhardt , Andrea Luttman , Jayasimha R. Daddam , Boon Hong Keng , Wonseob Kim , Cedric Gondro , Jongkyoo Kim
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引用次数: 0
Abstract
This study elucidated the degree of molecular response to heat stress (HS) in bovine myocytes by measuring changes in the transcriptome and proteome. Bovine satellite cells (BSCs) were extracted from holstein bull calves (n = 3, BW: 77.10 ± 2.02 kg). Following myogenic differentiation, myocytes were exposed to one of three treatment groups for 3 h: 38 °C (control; CON; n = 3), 39.5 °C (moderate heat stress; MHS; n = 3), and 41 °C (extreme heat stress; EHS; n = 3). RNA and protein were extracted for transcriptomic and proteomic sequencing analyses, respectively. Differentially expressed genes (DEGs) for the contrasts MHS vs. CON and EHS vs. CON were selected using an FDR adjusted significance threshold of P < 0.05, regardless of Log2 fold change, with differentially abundant proteins (DAPs) selected at an FDR adjusted significance threshold of P < 0.05 and absolute fold change ± 1.2. DEGs were then subjected to gene set enrichment analysis. A total of 888 DEGs were detected for MHS and 2590 for EHS, with 590 DEGs shared between MHS and EHS. EHS resulted in elevated expression of multiple heat shock protein (HSP) isoforms especially those related to HSP70, in addition to increased expression of FOXO6 and PPARGC1A. Alteration of key anabolic pathways associated with protein synthesis, modulation of myogenic regulatory factors, and the large number of DEGs detected in HS-myocytes demonstrates the speculation of phenotypic alterations to myotube size and protein synthesis.
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