当前位置:首页>南京>IF30.9!恭喜南京大学鼓楼医院副院长“国自然”拿下《Cell》子刊!提出肥胖治疗新思路!

IF30.9!恭喜南京大学鼓楼医院副院长“国自然”拿下《Cell》子刊!提出肥胖治疗新思路!

  • 2026-04-17 12:28:11
IF30.9!恭喜南京大学鼓楼医院副院长“国自然”拿下《Cell》子刊!提出肥胖治疗新思路!

📍南京大学鼓楼医院副院长毕艳丽教授领衔登顶 《Cell Metabolism》 ,揭示脂肪EVs-miRNAs调控中枢瘦素敏感性新机制,突破肥胖治疗瓶颈!

✅ 机制突破:发现脂肪细胞EVs携带miRNAs靶向PTPN2/SOCS3/PTEN/PIAS3,调控瘦素信号,填补脂肪-大脑对话空白😎

✅ 转化潜力:miR-148a-3p等与BMI负相关;工程化EVs靶向递送可逆转瘦素抵抗、显著减重,成药路径明确。

为肥胖治疗提供全新策略👏!

如果你也想进行生信分析,快联系发发生信,你的下一篇顶刊论文,或许就从这里开始!

分析框架

📌三大维度的研究分析框架已整理,点击图片查看。(10分钟获取核心要点)

 1.研究概况 I 2. 机制详解 3. 研究亮点

你还在观望什么?【发发生信】定制思路,全面数据分析,下一篇高分SCI就是你!

文献解读

标题:脂肪细胞来源的细胞外囊泡是中枢瘦素敏感性和能量稳态的关键调节因子

发表期刊:Cell Metabolism

发表时间:2026年1月6日

影响因子:30.9/Q1

科学验证因果,方法决定高度。完整生信方案,助力您的研究登上更高学术舞台。

研究背景

瘦素抵抗是肥胖的核心机制,指中枢对瘦素反应减弱导致能量失衡。该现象发现近三十年,成因仍不明确。

传统研究多聚焦大脑局部异常,忽视了脂肪与中枢的对话。脂肪分泌的细胞外囊泡是否调控瘦素敏感性,是代谢领域亟待解决的关键问题。

研究方法

一、动物模型:

  • Rab27敲除抑制脂肪囊泡;AAV介导脂肪组织Dicer、Rab27a等基因沉默。

二、示踪技术:

  • 荧光标记结合活体成像,追踪囊泡入脑路径及分布。

三、分子机制:

  • 测序筛选差异miRNA;双荧光素酶验证其靶向SOCS3、PIAS3、PTEN等负调控因子。

四、功能验证:

  • 立体定位注射;膜片钳记录AgRP/POMC神经元电活动;代谢舱监测能量代谢。

五、工程改造:

  • 过表达SIRPα/MCAM构建靶向囊泡,电穿孔装载miRNA验证疗效。

图形摘要

研究结果

01

EV调控能量稳态:

为探究脂肪组织来源细胞外囊泡Ad-EVs)在能量代谢中的作用,研究人员构建了脂肪组织EV分泌缺陷小鼠(Rab27 KO)。

1.特异性抑制AT-EVs

会导致能量平衡受损

结果显示,尽管这些小鼠进食量减少,能量消耗显著降低,体重增加更快、脂肪细胞体积明显增大【图1B-H】。

这表明Ad-EVs并非代谢过程的被动产物,而是主动参与能量平衡调控的重要信号介质。

02

健康EV逆转肥胖:

为验证这一猜想,研究人员给肥胖小鼠注射了来自瘦鼠的脂肪EV(chow-EVs)。

短短4周,效果显著:体重和脂肪量明显下降【图2B、C】,摄食减少、能耗增加【图2D-H】,脂肪细胞体积缩小【图2I-K】。

2.健康 的 EVs 减轻 肥胖

更具临床意义的是,健康体重人群的EV治疗同样有效【图2N-X】,而肥胖来源的EV则完全无效。这说明EV的功能取决于供体的代谢状态。

03

EV依赖大脑通路:

关键验证:在缺乏瘦素受体的db/db肥胖鼠中,同样的EV治疗完全失效。

图3.AT-EVs对调节下丘脑瘦素-黑皮质素

信号通路至关重要

机制研究发现,脂肪EV缺乏的小鼠,大脑中感知“饱”信号的关键分子pSTAT3活性降低【图3D、E】,促进食欲的神经元AgRP)异常活跃,而抑制食欲的神经元POMC)反应迟钝【图3F-I】。

电生理记录直接证实:失去EV信号后,AgRP和POMC神经元对瘦素的反应均明显变差【图3L-Q】。

04

EV靶向下丘脑:

脂肪EV是如何与大脑对话的?荧光示踪技术给出答案:脂肪EV注入体内后,会特异性地富集在下丘脑弓状核ARC)——调控食欲的核心区域【图4C-F】。

图4.AT-EVs直接作用于

中枢神经系统以调节能量稳态

更直接的证据:将正常EV直接注入基因缺陷小鼠的脑室,竟能“修复”全身EV缺失导致的代谢紊乱【图4H-L】。这证实脂肪EV直接作用于中枢神经系统。

05

miRNA介导增敏:

当通过敲低Dicer阻断脂肪细胞miRNA生成后,其来源EV完全丧失减肥功效【图5D-O】。

图5.miRNAs促进AT-EVs

在调节能量稳态中的作用

深度测序分析显示,肥胖个体EV中一群具有瘦素增敏潜能miRNA如miR-148a-3p、miR-30a-3p)显著下调,而可能破坏瘦素信号的miRNA则上调【图6A-F】。

图6.miRNA文件在健康-EV

功能中富集,作为瘦素增敏剂

减肥手术后,患者血清中这些“增敏”miRNA水平明显回升【图6O-Q】,提示其临床相关性。

06

工程EV精准治疗:

进一步研究发现,Ad-EVs表面SIRPα和MCAM蛋白是其被中枢神经系统特异性摄取的分子基础。

图7.利用工程化外泌体靶向

递送瘦素敏化miRNA缓解肥胖

基于此,研究人员构建了过表达这两种蛋白的工程化EV【图7A】,并将miR-148a-3p和miR-30a-3p装载其中。

该工程化EV能高效递送miRNA至下丘脑【图7D-I】,并在肥胖小鼠模型中恢复瘦素敏感性,显著降低体重、减少摄食、增加能耗【图7O-X】。

发现脂肪囊泡及其miRNA是调控瘦素敏感性的关键。肥胖导致miR-148a-3p、miR-30a-3p等丢失,引发瘦素抵抗工程化囊泡靶向递送这些miRNA至中枢,可恢复瘦素敏感性并显著减重,为肥胖治疗提供新策略。

想学习如何复刻这类高分研究的同学,欢迎联系发发生信!

End

发发生信

选题设计丨数据分析丨思路建议

从零突破到SCI发表

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  1. CONNECT:[ UseTime:0.001108s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001496s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000771s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000713s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001330s ]
  6. SELECT * FROM `set` [ RunTime:0.000605s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001597s ]
  8. SELECT * FROM `article` WHERE `id` = 499160 LIMIT 1 [ RunTime:0.001261s ]
  9. UPDATE `article` SET `lasttime` = 1776551605 WHERE `id` = 499160 [ RunTime:0.003092s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000632s ]
  11. SELECT * FROM `article` WHERE `id` < 499160 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001904s ]
  12. SELECT * FROM `article` WHERE `id` > 499160 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001171s ]
  13. SELECT * FROM `article` WHERE `id` < 499160 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004268s ]
  14. SELECT * FROM `article` WHERE `id` < 499160 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002358s ]
  15. SELECT * FROM `article` WHERE `id` < 499160 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002330s ]
0.179891s