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Updated: Sep 16, 2025

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在彩虹鱼 (Oncorhynchus mykiss) 中对热应激的代谢生理反应进行了基于多种OMICS的研究
Yang Yang1, Yingjie Liu2, Wenzhi Liu3
1Heilongjiang River Fisheries Research Institute of Chinese Academy of Fishery Sciences, Laboratory of Quality & Safety Risk Assessment for Aquatic Products (Harbin), Ministry of Agriculture and Rural Areas, Harbin 150070, China.
概括
全球变暖威胁冷水鱼类. 这项研究揭示了热应激如何影响彩虹鱼的生理和新陈代谢,确定了热耐受性的关键适应策略和基因.
科学领域:
- 水生物质毒理学研究
- 鱼类生理学 鱼类生理学
- 环境压力反应环境压力反应
背景情况:
- 全球变暖对冷水鱼类物种构成重大威胁.
- 了解鱼类对热应激的生理和代谢反应对于水产养殖和保护至关重要.
研究的目的:
- 建立一个彩虹鱼热应激模型.
- 在模拟的热应激条件下调查彩虹鱼的不良影响和适应策略.
- 确定彩虹鱼肝脏中热应激反应背后的分子机制.
主要方法:
- 彩虹鱼热应激模型,温度逐渐增加 (16°C至20°C).
- 肝脏组织的组织病理学检查.
- 转录组和代谢组分析.
- 测量抗氧化酶活性和活性氧物种 (ROS).
主要成果:
- 热应激诱导肝脏拥堵和肥胖症,表明炎症和脂质代谢失调.
- 增加的抗氧化酶活性和ROS水平表明抗氧化防御不足.
- 脂质代谢是最显著地改变的生物过程,前列腺素D2.2的升高.
- 适应性上调的酸和α-酸代谢,以及GPX4A和热冲击蛋白,可能有助于适应.
结论:
- 热应激会导致彩虹鱼肝脏的重大病理损伤和代谢障碍.
- 彩虹鱼表现出涉及脂质代谢和抗氧化系统的适应性策略,以应对热应激.
- 候选基因 (GPX4A,LOC118938277,hsp47) 已被确定用于繁殖耐热菌株.
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