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鱼类的低氧耐受性取决于脂质和碳水化合物之间的代谢偏好
Qiang Ma1,2, Yuan Luo1, Jia Zhong3
1LANEH, School of Life Sciences, East China Normal University, Shanghai 200241, China.
Zoological research
|September 18, 2023
概括
鱼类的低氧耐受性取决于能量来源的偏好. 抑制脂质代谢通过促进碳水化合物使用来提高耐受性,而激活它会降低耐受性. 这突显了脂质代谢在水生压力反应中的作用.
科学领域:
- *环境生理学 *环境生理学
- * 水生毒理学 * 水生毒理学
- *代谢生物化学 *代谢生物化学
背景情况:
- *低氧 (低氧) 是水生生物的重要环境压力因素.
- * 低氧耐受性机制在鱼类物种之间存在差异,并未完全理解.
- *能量代谢,特别是脂质和碳水化合物利用之间的平衡,可能起到至关重要的作用.
研究的目的:
- * 研究鱼类中脂质代谢,能量基质偏好和缺氧耐受性之间的关系.
- *阐明脂质代谢如何影响氧气消耗和缺氧期间氧化应激的分子机制.
- *根据各种鱼类的初级能源来比较不同鱼类的低氧耐受性.
主要方法:
- * 在鱼和斑马鱼中使用遗传 (基因淘汰,突变菌株,如脂肪甘油三酸脂酶) 和药理方法操纵脂质代谢.
- *评估过氧耐受性,氧气消耗,氧化损伤和代谢概况 (脂质与碳水化合物代谢).
- *分析了14种鱼类,这些鱼类代表着不同的食物营养水平和分类学群体,以将能量偏好与低氧耐受性相关联.
主要成果:
- * 激活脂质代谢 (例如,通过过氧酶增殖器激活受体α [Pparα]) 通过增加氧气需求和氧化损伤,降低了鱼的低氧耐受性.
- * 抑制脂质代谢 (例如,抑制线粒体脂质的进入或淘汰关键基因) 增强了鱼和斑马鱼的低氧耐受性.
- *低氧耐受性与能量基质偏好有关;更多依赖脂质的鱼类比使用碳水化合物的鱼类耐受性较低.
结论:
- *鱼类的低氧耐受性受到脂质代谢的调节和对脂质与碳水化合物能量来源的偏好显著的影响.
- *减少对脂质代谢的依赖,促进碳水化合物利用,提高了鱼类应对急性低氧条件的能力.
- * 准脂质代谢途径为改善面临环境压力的鱼群中缺氧弹性提供了潜在的策略.
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