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暴露于捕食者威胁会导致交感神经系统向骨肌肉的外流
Erin Gorrell1, Ashley M Shemery1, Leah Franks2
1School of Biomedical Sciences, Kent State University, Kent, OH 44242, United States of America.
Autonomic neuroscience : basic & clinical
|June 10, 2025
概括
捕食者的气味暴露增加了交感神经系统 (SNS) 流向骨肌的流量,增强了能量消耗,促进了体重减轻. 这项研究证实了骨肌肉的存在.
科学领域:
- 生理学 生理学 生理学
- 代谢过程中的代谢.
- 内分泌学 在内分泌学.
背景情况:
- 肥胖是一个全球性的健康问题,需要采取提高能源消耗的策略.
- 骨肌肉是调节能量消耗的关键目标.
- 以前的研究将捕食者气味暴露与通过骨肌肉热生成增加的身体活动和大鼠的体重减轻联系在一起.
研究的目的:
- 研究交感神经系统 (SNS) 在捕食者气味诱导的骨肌肉热生成中的作用.
- 在捕食者威胁期间量化SNS流向骨肌肉和脂肪组织的流量.
- 为了确定棕色脂肪组织 (BAT) 对这种热原反应的贡献.
主要方法:
- 测量北上腺素周转率 (NETO) 以评估SNS活动.
- 暴露于捕食者气味中的老鼠.
- 骨头间棕色脂肪组织 (iBATX) 的外科切除.
- 一种β3上腺激素激动剂 (CL-316,243) 的使用.
主要成果:
- 捕食者威胁显著增加了SNS流向骨肌肉,棕色脂肪组织 (BAT) 和一些白色脂肪库的流出.
- 缺乏BAT (iBATX) 的老鼠没有显示出捕食者气味诱导的肌肉热生成受损.
- 缺乏BAT的老鼠对β3上腺素激动剂CL-316,243.3的反应有所差异.
结论:
- 交感神经系统 (SNS) 流向骨肌肉的流出对于由捕食者威胁诱导的热生成至关重要.
- 棕色脂肪组织 (BAT) 似乎并不对捕食者气味诱导的骨肌肉热生成至关重要.
- 这些发现强化了SNS激活骨肌肉对能耗调节的重要性.
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