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在小鼠中,低氧会通过Plin2上调来破坏棕色脂肪的热能功能

Yajie Hu¹, Jialin Zhao¹, Shenhan Xu¹

¹Phenome Research Center of TCM, Department of Traditional Chinese Medicine, Shanghai Pudong Hospital, Pharmacophenomics Laboratory, Human Phenome Institute, Fudan University, Shanghai, China.

Diabetes, obesity & metabolism

|December 9, 2025

概括

高海拔低氧会通过增加Plin2而损害棕色脂肪组织 (BAT) 热生成,这与与肥胖相关的低氧不同. 这种新的途径为高度诱导的代谢功能障碍提供了治疗目标.

科学领域:

生理学生理学生理学
代谢科学代谢科学
环境医学环境医学

背景情况:

高海拔环境存在由于低氧的生理挑战.
已知与肥胖相关的缺氧会损害棕色脂肪组织 (BAT) 功能,影响脂解和热生成.
低氧对BAT功能的影响尚不清楚.

研究的目的:

为了调查下巴性缺氧是否会影响BAT功能.
为了确定潜在的分子机制,假设与肥胖相关的缺氧相比,涉及Plin2上调的独特途径.

主要方法:

在30天的时间里,小鼠被暴露在正常氧或低氧 (模拟6000m) 中.
通过脂质滴滴分析,脂质/三糖含量和热原蛋白表达,评估了BAT功能.
用冷暴露和β-上腺素刺激来评估发热能力,并补充了蛋白质组学和体外研究.

主要成果:

低压性缺氧导致体重减轻,但脂肪滴增大,脂肪积累增加.
低氧性小鼠对寒冷和β-上腺素刺激的热生成反应受损,热生成基因表达被抑制.
从机理上讲,低性缺氧增加了乳酸盐和PPARγ的上调,增强了Plin2的表达,损害了脂解和发热.

结论:

确定了一种新的缺氧-乳酸盐/PPARγ-Plin2轴,将体重减轻与BAT热生成脱.
这一途径代表了与高空暴露相关的代谢功能障碍的新疗法标.

关键词:

这是BATBATBAT.在Plin2上,Plin2就是Plin2.在UCP1中,UCP1是UCP1.催眠症催眠症的催眠症是什么热生成是一种热生成.

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