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Nat. Commun. | 苏州大学 | 脂肪里的“代谢开关”被发现!禁食如何重塑你的燃脂能力?

  • 2026-02-04 19:48:53
Nat. Commun. | 苏州大学 | 脂肪里的“代谢开关”被发现!禁食如何重塑你的燃脂能力?

脂肪里的“代谢开关”被发现!禁食如何重塑你的燃脂能力?

你有没有过这样的体验:明明吃得不多,体重却难以下降;稍微一吃多,脂肪就迅速堆积?这可能不是你的意志力问题,而是身体的“代谢灵活性”出了故障。

所谓代谢灵活性,就是身体在不同能量状态下自如切换燃料的能力——饥饿时高效燃烧脂肪,进食后迅速利用葡萄糖。然而,现代人长期处于“随时可吃”的状态,这种灵活切换的能力逐渐退化,导致肥胖、胰岛素抵抗甚至糖尿病。

最近,苏州大学贾志浩副教授&张勇教授联合剑桥大学等团队的一项重磅研究,揭开了这一现象背后的分子机制,并意外发现了一个关键的“代谢开关”:PRMT3蛋白。更令人振奋的是,这个开关竟然能被“限时进食”(Time-Restricted Feeding, TRF)精准调控!

研究团队发现,在小鼠的内脏脂肪(eWAT)中,PRMT3的活性会随着进食和禁食周期发生规律性波动:

  • 进食后
    胰岛素信号激活AKT通路,进而“点亮”PRMT3;
  • 禁食时
    PRMT3水平迅速下降,脂肪细胞进入“节能+燃脂”模式。

图1:PRMT3在小鼠内脏脂肪中呈现明显的昼夜节律,夜间进食期升高,白天禁食期降低。

更关键的是,PRMT3会直接修饰一个名为SLC25A1的线粒体柠檬酸转运蛋白。这个蛋白就像脂肪合成的“加速器”——它把线粒体内的柠檬酸运到细胞质中,用于制造新的脂肪酸。而PRMT3通过甲基化修饰,稳定了SLC25A1,使其在进食后大量积累,促进脂肪储存。

图2:PRMT3与SLC25A1直接结合并对其精氨酸位点进行甲基化修饰,增强其稳定性。

那么,如果关闭这个“开关”会怎样?

研究人员使用一种名为SGC707的PRMT3抑制剂处理高脂饮食诱导的肥胖小鼠。结果令人惊喜:

  • 体重显著下降,脂肪组织减少;
  • 胰岛素敏感性和葡萄糖耐量明显改善;
  • 能量代谢更灵活——呼吸交换率(ΔRER)升高,说明身体更倾向于燃烧碳水化合物而非囤积脂肪。

图3:PRMT3抑制剂SGC707治疗显著减轻高脂饮食小鼠的体重和脂肪堆积,并改善糖代谢。

更有意思的是,当研究人员在脂肪细胞中特异性敲除Slc25a1基因后,即使喂食高脂饮食,小鼠也不易发胖,血糖控制也更好。这说明,PRMT3-SLC25A1轴确实是调控脂肪储存的关键通路。

而最贴近我们生活的发现来了:16:8限时进食(每天只在8小时内进食,其余16小时禁食)竟能天然地“关闭”这个通路!

  • 实施16:8 TRF的小鼠,其内脏脂肪中的PRMT3和SLC25A1水平显著降低;
  • 代谢灵活性增强,脂肪肝减轻,体重得到控制;
  • 效果几乎与药物抑制PRMT3相当!

图4:16:8限时进食方案有效抑制内脏脂肪中PRMT3-SLC25A1通路的活性。

这项研究不仅解释了为什么限时进食对减肥和控糖有效,还为开发新型抗肥胖药物提供了靶点。未来,或许可以通过调节PRMT3活性,让身体“以为”自己正在禁食,从而获得类似TRF的健康益处——即使你偶尔破戒吃多了,也不必过于焦虑。

当然,目前这些发现主要基于动物实验。但研究团队也在人体样本中验证了相关性:肥胖人群的内脏脂肪中,PRMT3和甲基化蛋白水平显著升高,且血清中的不对称二甲基精氨酸(ADMA)与BMI呈正相关。

这提醒我们:现代生活方式打乱了古老的进食节律,让我们的脂肪细胞长期处于“合成模式”,失去了应对能量变化的弹性。而回归规律的进食窗口,可能是重启代谢灵活性的最自然方式。

互动时间:你尝试过16:8限时进食吗?效果如何?欢迎在评论区分享你的经验!如果你觉得这篇文章有启发,别忘了点赞、转发给关心健康的朋友们~


参考文献

Huang, Z., Liu, X., Chen, X. et al. PRMT3-mediated posttranslational adaptation to fasting regulates metabolic flexibility. Nat Commun (2026). https://doi.org/10.1038/s41467-026-68883-6

厦门天鹭飞扬科技有限公司

电话: 13225921134

网站: www.xmtlfy.com

#限时进食 #代谢灵活性 #PRMT3 #脂肪代谢 #肥胖

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  1. CONNECT:[ UseTime:0.000668s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001132s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000391s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000245s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000709s ]
  6. SELECT * FROM `set` [ RunTime:0.000247s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000947s ]
  8. SELECT * FROM `article` WHERE `id` = 474835 LIMIT 1 [ RunTime:0.000544s ]
  9. UPDATE `article` SET `lasttime` = 1770296688 WHERE `id` = 474835 [ RunTime:0.003885s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000347s ]
  11. SELECT * FROM `article` WHERE `id` < 474835 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000696s ]
  12. SELECT * FROM `article` WHERE `id` > 474835 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.007923s ]
  13. SELECT * FROM `article` WHERE `id` < 474835 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003512s ]
  14. SELECT * FROM `article` WHERE `id` < 474835 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003526s ]
  15. SELECT * FROM `article` WHERE `id` < 474835 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004056s ]
0.099971s