过度养会导致脂肪组织释放出不同的线粒体
Joshua H Goodman1, Chloé Berland1, Rajesh K Soni2
1Division of Preventive Medicine & Nutrition, Naomi Berrie Diabetes Center, Columbia University, New York, NY, USA.
Cell reports
|February 19, 2025
概括
过度养小鼠会导致肥胖,免疫细胞积累较低. 脂肪组织释放自由线粒体,与全脂肪线粒体不同,可能会影响脂肪的产生.
科学领域:
- 代谢研究的研究.
- 细胞生物学 细胞生物学
- 肥胖研究的研究.
背景情况:
- 过度养动物导致具有独特特征的肥胖,包括减少免疫细胞透到脂肪组织和厌食症.
- 过度养对脂肪组织分泌物产生影响的具体机制在很大程度上仍未被探索.
研究的目的:
- 研究过度养对脂肪组织蛋白质分泌物的影响.
- 从过度养的脂肪组织中释放的蛋白质,特别是线粒体的性质和来源的特征.
主要方法:
- 对过度养小鼠的脂肪组织中的蛋白质分泌体进行比较分析,与任意养小鼠进行比较分析.
- 从培养脂肪的条件介质中进行线粒体隔离和表征.
- 显微镜检测细胞外线粒体的存在和形式.
主要成果:
- 与对照组相比,过度养小鼠的脂肪组织分泌的免疫调节蛋白水平较低.
- 令人惊的是,过度养小鼠的脂肪释放出大量的线粒体蛋白质.
- 显微镜揭示了条件介质中的自由细胞外线粒体,不受囊泡封闭.
- 释放的线粒体的蛋白质组成不同于整个脂肪组织线粒体的蛋白质组成,这表明释放的是特定的子集.
结论:
- 过度养会改变脂肪组织的分泌物,减少免疫因子,增加细胞外线粒体的释放.
- 从过度养的脂肪中释放出独特的线粒体子集,可能在新生脂质生成等代谢过程中发挥作用.
- 这些发现支持了细胞可以通过释放线粒体作为自由有机体来修改其能量配置的概念.
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