Surviving the heat: The homeostatic regulation mechanism of endangered Brachymystax tsinlingensis
文献类型： 外文期刊
作者： Wang, Zhenlu 1 ; Ye, Huan 2 ; Liu, Peng 1 ; Lin, Shaoqing 3 ; Wang, Yizhou 1 ; Zhou, Qiong 2 ; Jiang, Haibo 1 ; Shao, Jian 1 ;
作者机构： 1.Guizhou Univ, Coll Anim Sci, Lab Fishery Resources & Environm Protect, Key Lab Anim Genet Breeding & Reprod Plateau Mount, Guiyang 550025, Peoples R China
2.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Minist Agr & Rural Affairs, Key Lab Freshwater Biodivers Conservat, Wuhan 430223, Peoples R China
3.Tibet Anim Husb Serv Ctr, Lhasa 850000, Peoples R China
关键词： Brachymystax tsinlingensis; Heat stress; Homeostasis; Transcriptome
期刊名称：JOURNAL OF THERMAL BIOLOGY （ 影响因子：2.9； 五年影响因子：3.2 ）
ISSN： 0306-4565
年卷期： 2025 年 127 卷
页码：
收录情况： SCI
摘要： Conservation and utilization of Brachymystax tsinlingensis Li, 1966 (B. tsinlingensis), an endangered cold-water fish, is severely hampered by heat stress. In this study, heat stress and recovery experiments were firstly performed and implied that the intestine of B. tsinlingensis remained capable of self-regulation under heat stress. Therefore, transcriptome analysis was used to investigate the homeostatic mechanisms of B. tsinlingensis during temperature fluctuations. The results showed that a total of 5775 differentially expressed genes (DEGs) (1725 upand 4050 down-regulated) were identified in the heat stress group, and 4312 DEGs (2024 up- and 2228 downregulated) were identified in the recovery group when compared to their expression levels in the control group. Through Gene Set Enrichment Analysis (GSEA), citrate cycle (TCA cycle), oxidative phosphorylation, apoptosis, ferroptosis, focal adhesion, and tight junction pathways were found to be significantly up-regulated during heat stress, and declined during the recovery process. The results illustrated that heat stress caused ferroptosis and apoptosis in B. tsinlingensis. However, the organism was able to maintain homeostasis during temperature fluctuations modulating its energy metabolism, as well as the barrier and immune functions of the intestine. These findings help to enhance our understanding of the acclimation mechanisms of cold-water fish in present-day climate change.
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