酸盐氧化在Drosophila melanogaster中在高温下挽救了线粒体ATP合成
Damien Roussel1, Sonia Janillon2, Loïc Teulier1
1Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, Villeurbanne, France.
FEBS letters
|July 18, 2023
概括
高温会降低Drosophila.中的ATP产量. 酸盐的添加完全恢复了呼吸和ATP合成,这对于果的热适应至关重要.
科学领域:
- 生物化学 生化学
- 昆虫生理学 昆虫生理学
- 线粒体呼吸 线粒体呼吸
背景情况:
- 草的热耐受性与高温下呼吸速率的改变有关.
- 了解腺三酸盐 (ATP) 生产和合效率 (ATP/O) 的变化是解释热适应的关键.
研究的目的:
- 为了研究高温对Drosophila melanogaster的ATP生产率和ATP/O比率的影响.
- 确定特定基质 (pyruvate+malate, succinate, glycerol-3-phosphate) 在补偿热应激诱导的代谢变化的作用.
主要方法:
- 在不同温度下测量分离线粒体中氧气消耗和ATP合成速率.
- 对酸盐+酸盐,酸盐和甘-3-酸盐对线粒体功能的基质特异性影响的评估.
- 计算ATP/O比率以评估氧化酸化效率.
主要成果:
- 在35°C时,pyruvate+malate氧化导致ATP合成的崩和ATP/O比率的降低.
- 酸盐的添加完全弥补了高温下氧气消耗和ATP合成速率.
- 甘-3-酸盐增加了呼吸,但没有增强ATP的产生,这表明补偿有限.
结论:
- 酸盐是唯一能够完全恢复氧气消耗和ATP生产的替代基质,在Drosophila的高温压力下氧化酸化过程中.
- 这些发现凸显了酸盐在通过维持能量平衡来促进热适应的关键作用.
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