深度潜水哺乳动物中线粒体的循环合
Chiara Ciccone1, Fayiri Kante1, Lars P Folkow1
1Arctic Seasonal Timekeeping Initiative (ASTI), Arctic Chronobiology and Physiology Research Group, Department of Arctic and Marine Biology, UiT - The Arctic University of Norway, Tromsø NO-9037, Norway.
The Journal of experimental biology
|March 18, 2024
概括
盖帽海在钟基因表达和线粒体活动中表现出日常潜水模式和昼夜节律. 这表明,在深潜哺乳动物中,昼夜钟与线粒体功能之间存在联系.
科学领域:
- 生理学 生理学 生理学
- 时间生物学 时间生物学
- 海洋哺乳动物科学科学
背景情况:
- 线粒体氧化酸化对于细胞能量需求和缺氧适应至关重要.
- 昼夜分子钟影响线粒体功能和缺氧感应.
- 潜水哺乳动物在日常潜水模式下面临间歇性缺氧,这使得昼夜线粒体相互作用变得相关.
研究的目的:
- 研究罩海 (Cystophora cristata) 的潜水行为和生理学的昼夜模式.
- 探索这个物种中昼夜钟和线粒体功能之间的关系.
- 了解潜水深度哺乳动物对缺氧的潜在适应.
主要方法:
- 观察到野生盖帽海潜水行为的日常模式.
- 培养的盖帽海皮肤纤维细胞来评估昼夜基因表达 (per2, arntl).
- 在同步纤维细胞中测量了线粒体的氧气消耗和合效率.
主要成果:
- 盖帽海在潜水行为中表现出显著的日常模式.
- 核心时钟基因 (per2,arntl) 在纤维细胞培养物中显示出强大的昼夜振荡.
- 肝脏组织显示,与白天相比,夜晚的ARNTL表达率高出4倍.
- 线粒体活动随着昼夜节律的变化而变化,在arntl谷处显示出更高的复杂I合效率.
结论:
- 盖帽海拥有功能性的昼夜时钟,影响基因表达和线粒体活动.
- 线粒体功能的循环调节可能是对潜水和足动物缺氧的适应.
- 这些发现为未来研究潜水哺乳动物的昼夜低氧相互作用提供了基础.
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