Chronic Heat Stress Caused Lipid Metabolism Disorder and Tissue Injury in the Liver of Huso dauricus via Oxidative-Stress-Mediated Ferroptosis
文献类型： 外文期刊
作者： Zhang, Yining 1 ; Li, Yutao 1 ; Wang, Ruoyu 1 ; Wang, Sihan 1 ; Sun, Bo 1 ; Cao, Dingchen 1 ; Sun, Zhipeng 1 ; Lv, Weihua 1 ; Ma, Bo 2 ; Zhang, Ying 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Heilongjiang River Fishery Res Inst, Key Lab Cold Water Fish Germplasm Resources & Mult, Harbin 150070, Peoples R China
2.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China
3.Chinese Acad Fishery Sci, Heilongjiang River Fishery Res Inst, Heilongjiang River Basin Fishery Resources & Envir, Harbin 150070, Peoples R China
关键词： Huso dauricus; oxidative stress; heat stress; liver; transcriptome; kaluga sturgeon
期刊名称：ANTIOXIDANTS （ 影响因子：6.6； 五年影响因子：7.3 ）
ISSN：
年卷期： 2025 年 14 卷 8 期
页码：
收录情况： SCI
摘要： High-temperature stress has become an important factor that has restricted the aquaculture industry. Huso dauricus is a high-economic-value fish that has faced the threat of thermal stress. Based on this point, our investigation aimed to explore the detailed mechanism of the negative impacts of heat stress on the liver metabolism functions in Huso dauricus. In this study, we set one control group (19 degrees C) and four high-temperature treatment groups (22 degrees C, 25 degrees C, 28 degrees C, 31 degrees C) with 40 fish in each group for continuous 53-day heat exposure. Histological analysis, biochemical detection, and transcriptome technology were used to explore the effects of heat stress on the liver structure and functions of juvenile Huso dauricus. It suggested heat-stress-induced obvious liver injury and reactive oxygen species accumulation in Huso dauricus with a time/temperature-dependent manner. Serum total protein, transaminase, and alkaline phosphatase activities showed significant changes under heat stress (p < 0.05). In addition, 6433 differentially expressed genes (DEGs) were identified based on the RNA-seq project. Gene Ontology enrichment analysis showed that various DEGs could be mapped to the lipid-metabolism-related terms. KEGG enrichment and immunohistochemistry analysis showed that ferroptosis and FoxO signaling pathways were significantly enriched (p < 0.05). These results demonstrated that thermal stress induced oxidative stress damage in the liver of juvenile Huso dauricus, which triggered lipid metabolism disorder and hepatocyte ferroptosis to disrupt normal liver functions. In conclusion, chronic thermal stress can cause antioxidant capacity imbalance in the liver of Huso dauricus to mediate the ferroptosis process, which would finally disturb the lipid metabolism homeostasis. In further research, it will be necessary to verify the detailed cellular signaling pathways that are involved in the heat-stress-induced liver function disorder response based on the in vitro experiment, while the multi-organ crosswalk mode under the thermal stress status is also essential for understanding the comprehensive mechanism of heat-stress-mediated negative effects on fish species.
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