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Integrated metabolomic and transcriptomic responses to heat stress in a high-altitude fish, Triplophysa siluroides

文献类型: 外文期刊

作者: Chen, Yeyu 1 ; Wu, Xiaoyun 1 ; Li, Pengcheng 1 ; Liu, Ya 1 ; Song, Mingjiang 1 ; Li, Feiyang 1 ; Ou, Jun 1 ; Lai, Jiansheng 1 ;

作者机构: 1.Sichuan Acad Agr Sci, Fishery Inst, Chengdu 611730, Peoples R China

关键词: Triplophysa siluroides; Heat stress; Heat shock protein; RNA-Seq; Metabolism sequencing

期刊名称:FISH & SHELLFISH IMMUNOLOGY ( 影响因子:4.7; 五年影响因子:4.7 )

ISSN: 1050-4648

年卷期: 2023 年 142 卷

页码:

收录情况: SCI

摘要: Species in Triplophysa display strong adaptability to the extreme environment of the plateau, thus offering an ideal model to study the molecular mechanism of fish adaptation to environmental stress. In the present study, we conducted integrated analysis of the transcriptome and metabolism of liver tissue in Triplophysa siluroides under heat stress (28 degrees C) and control (10 degrees C) conditions to identify heat stress-induced genes, metabolites and pathways. RNA-Seq identified 2373 differentially expressed genes, which consisted of 1360 upregulated genes and 1013 downregulated genes, in the heat stress group vs. the control group. Genes in the heat shock protein (Hsp) family, including Hsp40, Hsp70, Hsp90 and other Hsps, were strongly upregulated by heat stress. Pathway enrichment analysis revealed that the PI3K/AKT/mTOR and protein processing in the endoplasmic reticulum (ER) pathways were significantly affected by heat stress. Metabolism sequencing identified a total of 155 differentially abundant metabolites, including 118 significantly upregulated metabolites and 37 downregulated metabolites. Combined analysis of the transcriptome and metabolism results showed that ubiquitin-dependent proteolysis and purine metabolism pathways were enhanced in response to acute heat stress to protect cells from damage under stress conditions. The results of this study may contribute to our understanding of the underlying molecular mechanism of the heat stress response in cold-water fish.

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