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Nat. Commun. | 深圳大学 | 白色脂肪萎缩竟是男性衰老加速器?

  • 2026-05-01 10:08:48
Nat. Commun. | 深圳大学 | 白色脂肪萎缩竟是男性衰老加速器?

白色脂肪萎缩竟是男性衰老加速器?

你有没有发现,很多中老年男性体型“干瘦”,皮下脂肪明显减少?这不仅是外形变化,还可能暗藏健康隐患。近日,深圳大学苏文副教授与刘宝华教授团队在国际顶级期刊《自然·通讯》(Nature Communications)发表重磅研究,揭示了一个颠覆认知的现象:皮下白色脂肪的萎缩会加剧冷应激,并成为驱动雄性哺乳动物全身性衰老的关键因素

这项研究不仅解释了为何部分男性在衰老过程中更容易出现代谢和器官功能衰退,还意外发现了一种简单有效的干预手段——适当提高环境温度,竟能显著延缓衰老、延长寿命


脂肪不只是“赘肉”,更是保温层

我们常把白色脂肪(WAT)视为多余的能量储存库,但其实它还有重要功能:隔热保温。尤其是分布在皮肤下方的皮下脂肪,就像人体自带的“羽绒服”,能有效减少热量散失。随着年龄增长,男性的皮下脂肪往往逐渐减少,而内脏脂肪却可能增加。这种变化是否只是衰老的结果,还是反过来会加速衰老?此前科学界一直不清楚。

为解开这个谜题,研究团队构建了一种特殊的小鼠模型:在脂肪细胞中特异性表达一种名为 LmnaG609G 的突变基因(该突变模拟人类早衰症)。结果令人惊讶:只有雄性小鼠出现了进行性白色脂肪萎缩,表现为皮下脂肪和腹股沟脂肪显著减少,脂肪细胞体积缩小,甚至皮肤下的脂肪层几乎消失;而雌性小鼠则完全不受影响。

更关键的是,这些雄性小鼠不仅脂肪少了,还提前出现了骨质疏松、心脏功能下降、活动能力减弱等典型衰老特征,中位寿命明显缩短


怕冷不是错觉,而是身体在“报警”

为什么脂肪萎缩会让雄性小鼠加速衰老?研究发现,罪魁祸首是慢性轻度冷应激

实验室通常将小鼠饲养在22℃环境中——这对人类很舒适,但对小鼠而言已是“微冷”状态(小鼠的热中性区约为30℃)。正常小鼠依靠皮下脂肪保温,体温稳定。但脂肪萎缩的雄性小鼠保温能力大打折扣,身体持续处于“觉得冷”的状态。

为了维持核心体温(CBT),它们的棕色脂肪(BAT)被迫超负荷工作:产热基因(如 Ucp1Pgc1a)表达飙升,BAT温度升高,最终导致核心体温异常升高。这种“过热”并非好事,反而是一种应激反应。

进一步机制研究发现,冷应激激活了白色脂肪中的 COX-2 酶,促使前列腺素E2(PGE2)大量生成,正是这一通路介导了核心体温的异常上升,并引发全身性炎症与衰老。


两种简单方法,逆转衰老进程

最令人振奋的是,研究团队找到了两种有效干预策略:

  1. 热疗:把环境温度从22℃提高到26℃    在这个更温暖的环境中,脂肪萎缩的雄性小鼠不再感到寒冷,核心体温恢复正常,衰老症状显著减轻,寿命得以延长

  1. 药物抑制:使用COX-2抑制剂塞来昔布(Celecoxib)    这是一种常见的非甾体抗炎药。给小鼠服用后,PGE2生成减少,体温回归正常,同样缓解了衰老表型并延长寿命

(示意图:热疗或COX-2抑制可改善雄性脂肪萎缩小鼠的生存率)

这说明,白色脂肪萎缩本身并非不可逆的衰老终点,而是通过冷应激触发了一个可干预的病理循环


从老鼠到人类:温暖或许是最好的抗衰良方

虽然研究基于小鼠模型,但其启示意义重大。人类男性在中老年阶段确实普遍存在皮下脂肪减少的现象,尤其在四肢和面部。如果长期处于空调房、冬季保暖不足等“轻度冷暴露”环境中,是否也会因类似机制加速衰老?

刘宝华教授团队指出,这项研究首次将皮下脂肪流失—冷应激—体温失调—系统性衰老串联成一条清晰的因果链,并强调了性别差异的重要性——雌性小鼠因激素或其他保护机制未受影响,这也解释了为何女性普遍比男性更耐寒、衰老进程相对缓慢。

未来,针对早衰症患者或高龄男性,适度提高居住环境温度、避免长期低温暴露,可能成为一种低成本、无副作用的抗衰老策略。同时,COX-2通路也为开发新型抗衰药物提供了靶点。


你的家里冬天暖气够足吗?是否经常觉得手脚冰凉却没在意?这项研究提醒我们:保暖,不只是舒服,更是健康长寿的关键一环。欢迎在评论区分享你的“抗冷”经验,或谈谈你对脂肪与衰老关系的新认识!

📚 参考文献

Zuojun Liu, Wenjing Hu, Xiaoqing Tan, Shimin Sun, Xin Huang, Yuan Meng, et al. White adipose atrophy exacerbates cold stress and accelerates aging in male mice. Nat. Commun., 2026. DOI: https://doi.org/10.1038/s41467-026-71857-3.

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#白色脂肪 #冷应激 #男性衰老 #热疗 #抗衰老

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  1. CONNECT:[ UseTime:0.000601s ] mysql:host=127.0.0.1;port=3306;dbname=c460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000619s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000904s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000943s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000523s ]
  6. SELECT * FROM `set` [ RunTime:0.001871s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000598s ]
  8. SELECT * FROM `article` WHERE `id` = 558062 LIMIT 1 [ RunTime:0.000472s ]
  9. UPDATE `article` SET `lasttime` = 1777741469 WHERE `id` = 558062 [ RunTime:0.004908s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000253s ]
  11. SELECT * FROM `article` WHERE `id` < 558062 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001473s ]
  12. SELECT * FROM `article` WHERE `id` > 558062 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001750s ]
  13. SELECT * FROM `article` WHERE `id` < 558062 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000668s ]
  14. SELECT * FROM `article` WHERE `id` < 558062 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003530s ]
  15. SELECT * FROM `article` WHERE `id` < 558062 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003982s ]
0.107413s