环境盐度对鱼的分支和肝脏碳水化合物代谢有不同的影响
Ryan J A Chang1, Fritzie T Celino-Brady1, Jason P Breves2
1Department of Human Nutrition, Food, and Animal Sciences, University of Hawai'i at Mānoa, Honolulu, Hawaii, USA.
Journal of fish biology
|May 30, 2025
概括
盐度的变化会影响鱼类的能量. 盐度下降导致血糖升高,而盐度增加促进了中的糖原分解. 这表明鱼肝和中的碳水化合物代谢有差异性调节.
科学领域:
- 生理学 生理学 生理学
- 生物化学 生物化学
- 环境科学 环境科学
背景情况:
- 欧鱼调节离子运输,使用动员的能量来应对盐度变化.
- 糖原合成酶 (GS) 和糖原酸化酶 (GP) 是控制碳水化合物代谢的关键酶.
- 在盐度变化期间,肝脏和中的GS,GP和葡萄糖载体 (GLUT) 的协调调节尚未完全理解.
研究的目的:
- 研究单向和潮盐度变化对莫桑比克鱼的碳水化合物代谢的影响.
- 描述在不同盐度条件下的鱼的肝脏和中的糖代谢和葡萄糖运输的调节.
主要方法:
- 鱼在淡水 (FW) 和海水 (SW) 之间经历了单向转移,并经历了潮状态 (TR),交替FW和SW.
- 在肝脏和状组织中分析了GS,GP和GLUT1的基因表达.
- 测量了血糖和肝脏糖原水平.
主要成果:
- 盐度降低 (SW到FW或TR的FW阶段) 导致高血糖和肝脏GS和GP表达的增加.
- 盐度增加 (FW到SW或TR的SW阶段) 促进了分支糖原分解,由改变的GP表达体现,并减少了分支GLUT1表达体.
- 与SW阶段相比,潮盐度的变化导致FW阶段的肝脏和中的GLUT1表达更高.
结论:
- 盐度的变化在欧鱼的肝脏和中不同调节碳水化合物代谢.
- 枝状糖原分解是由增加的盐度促进,而盐度下降导致高血糖症.
- 鱼类度调节器官中的葡萄糖载体表达对盐度波动和像皮质醇这样的荷尔蒙信号敏感.
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