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代谢剖析揭示了远东和西伯利亚青之间的低氧反应的差异
Sergei V Shekhovtsov1,2, Nina A Bulakhova2, Yuri P Tsentalovich3
1Institute of Cytology and Genetics SB RAS, Lavrentieva av. 10, 630090 Novosibirsk, Russia.
Animals : an open access journal from MDPI
|November 14, 2023
概括
西伯利亚青 (Rana amurensis) 通过积累糖醇和2,3-butanediol而在长时间的无氧中生存,与远东青不同. 这种代谢适应是两动物无氧耐受性的关键.
科学领域:
- 比较生理学比较生理学
- 代谢学 代谢学 代谢学
- 无氧适应 无氧适应
背景情况:
- 无氧对动物的生存构成重大威胁,导致组织损伤和死亡.
- 西伯利亚青 (Rana amurensis) 独特地容忍长时间接近零的氧气水平.
- 远东青 (Rana dybowskii) 容易发生缺氧.
研究的目的:
- 为了比较在缺氧的情况下西伯利亚和远东青的代谢概况.
- 为了研究西伯利亚青用于无氧生存的代谢策略.
主要方法:
- 肝脏,大脑和心脏组织的代谢分析.
- 对西伯利亚青长期无氧 (0.2 mg/L氧气) 的暴露.
- 远东青暴露于短期低氧,达到它们的耐受性极限.
主要成果:
- 远东青器官的乳酸水平高于西伯利亚青器官,尽管缺氧暴露时间较短.
- 糖醇和2,3-butanediol在西伯利亚青中显著积累,但在远东青中没有.
- 在两种物种之间,酸盐的含量是相似的.
结论:
- 西伯利亚青表现出明显的代谢适应,包括糖醇和2,3-butanediol积累,用于无氧耐受.
- 这些化合物可以通过糖解的侧面途径产生.
- 为西伯利亚青无氧适应提出了一种代谢途径.
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