Characterization of transcriptomic and proteomic changes in bovine myocytes subject to temporal heat stress

IF 2.9 2区 生物学 Q2 BIOLOGY
Erika Eckhardt , Andrea Luttman , Jayasimha R. Daddam , Boon Hong Keng , Wonseob Kim , Cedric Gondro , Jongkyoo Kim
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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.

Abstract Image

牛肌细胞在时间热应激下转录组学和蛋白质组学变化的表征
本研究通过测定牛肌细胞转录组和蛋白质组的变化,阐明了牛肌细胞对热应激(HS)的分子响应程度。牛卫星细胞(Bovine satellite cells, BSCs)来自荷斯坦公牛犊牛(n = 3,体重:77.10±2.02 kg)。在肌源性分化后,将肌细胞暴露在三个处理组中的一个中3小时:38°C(对照组;CON; n = 3), 39.5°C(中度热应激;MHS; n = 3)和41°C(极端热应激;EHS; n = 3)。提取RNA和蛋白质,分别进行转录组和蛋白质组测序分析。在不考虑Log2倍变化的情况下,采用FDR调整显著性阈值P <; 0.05选择MHS与CON和EHS与CON对照的差异表达基因(DEGs),采用FDR调整显著性阈值P <; 0.05和绝对倍数变化±1.2选择差异丰富蛋白(DAPs)。然后对deg进行基因集富集分析。MHS共有888个,EHS共有2590个,其中MHS和EHS共有590个。EHS导致多种热休克蛋白(HSP)异构体的表达升高,尤其是与HSP70相关的异构体,此外FOXO6和PPARGC1A的表达也增加。与蛋白质合成相关的关键合成代谢途径的改变,肌生成调节因子的调节,以及在hs -肌细胞中检测到的大量DEGs,证明了肌管大小和蛋白质合成的表型改变的推测。
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来源期刊
Journal of thermal biology
Journal of thermal biology 生物-动物学
CiteScore
5.30
自引率
7.40%
发文量
196
审稿时长
14.5 weeks
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
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