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IF 48.5!恭喜郑州大学校长李蓬院士联合北大最新“国自然”研究登顶《Nature》!

  • 2026-03-31 06:18:25
IF 48.5!恭喜郑州大学校长李蓬院士联合北大最新“国自然”研究登顶《Nature》!

引言

introduction

📍 郑大x北大《Nature》

内质网膜失衡,竟触发致命肝病😮

✅CLCC1缺失:

磷脂翻转受阻→脂滴在ER腔内堆积→加速脂肪性肝炎。

✅TMEM41B缺失:

同通路失效→血脂近乎清零,且肝损伤同步加剧。

✅关键互作轴:

CLCC1识别膜失衡→招募TMEM41B激活磷脂翻转

→保障脂蛋白生成。

精准代谢干预新靶点浮出水面👏!

如果你也想利用国自然热点+多组学进行生信分析,快关注我们后台咨询吧!生信百事通,助力每一个科研梦想!

Chanpter 01

文献解读

标题:CLCC1调控内质网双层平衡以维持脂质稳态

发表期刊:Nature

发表时间:2026年2月25日

影响因子:48.5/Q1

Chanpter 02

研究背景

内质网脂质合成分泌的核心枢纽,但其跨膜磷脂转运机制,特别是如何维持脂质稳态以避免代谢性疾病,尚不明确。

Chanpter 03

研究方法

综合利用基因编辑、冷冻电子断层扫描、体外功能重建蛋白质结构预测,结合多组学整合遗传关联分析,发现ER膜蛋白CLCC1通过促进磷脂翻转酶TMEM41B介导的跨膜磷脂翻转,调控脂蛋白生物合成与分泌。

Chanpter 04

研究思路

📌三大维度的研究思路框架已整理,点击图片查看。(5分钟获取核心要点)!

《磷脂双层均衡:

CLCC1介导的内质网稳态调控与脂代谢》

Chanpter 05

研究结果

1.脂滴异象

研究团队发现,当肝细胞中关键蛋白TMEM41B缺失后,原本游离的脂滴竟被内质网ER)的膜整个“吞”了进去,形成一种巨大的“膜包油”结构gelDs)。

图1.CLCC1或TMEM41B缺失

可触发基因相关疾病(geLDs)

通过三维成像【图1b】可见,正常细胞中脂滴紧挨内质网;而TMEM41B缺陷细胞中,脂滴则被内质网紧紧包裹。

这种异常源于内质网膜内外两层脂质分布不均。细胞通过生成巨大脂滴来缓解膜的压力【图1i】。

对这些脂滴的蛋白质分析发现,它们几乎不含常规脂滴标记蛋白如PLIN2),反而富集了大量内质网自身蛋白【图1e】。

2.关键蛋白

这种异常脂滴成了宝贵的“探针”。将脂滴富集蛋白与已知调控网络比对后,研究人员锁定了一个此前功能未知的蛋白——CLCC1

图1.CLCC1或TMEM41B缺失

可触发基因相关疾病(geLDs)

“敲除”CLCC1基因后细胞完美复制出与TMEM41B缺失时一模一样的“膜包油”现象【图1l】。

图2.CLCC1–TMEM41B调控整体脂质输出

进一步实验证实,CLCC1与TMEM41B是“物理搭档”。人类遗传学数据也显示,CLCC1基因变异与血液中“坏胆固醇”水平显著相关【图2c】。

3.调度机制

那么,CLCC1是如何工作的?研究团队发现,它扮演着一个关键的“调度员”角色。

图3.CLCC1将磷脂失衡与基因重排相关联

当内质网膜出现脂质失衡时,CLCC1迅速聚集到“不平衡”区域,并“召唤”它的搭档——磷脂翻转酶TMEM41B【图3d】。

体外实验证明,CLCC1本身没有翻转能力,与TMEM41B“组队”后,却能大幅提升其效率【图3j】。

这解释了为何缺乏CLCC1会导致脂蛋白组装与分泌受阻。

4.肝脏风暴

如果这种平衡在肝脏这个“脂质加工厂”中被打破,后果是什么?答案是:一场严重的代谢风暴

图4.CLCC1保护肝脏内质网结构

在敲除CLCC1的小鼠模型中,仅4周肝脏就出现严重脂肪性肝炎MASH),肝脏苍白肿大,甚至能浮在水面上【图4a, c】。

电镜显示,肝细胞被大量凝胶状脂滴充斥,负责运输脂质的“货运火车”VLDL完全消失【图4f, g】。

同时敲掉CLCC1和TMEM41B,病情并未加重【图4h】,证明它们在细胞内处于同一“生产线”。

5.治疗前景

研究最后,科学家探索了CLCC1在应对代谢应激时的角色。

图5.CLCC1可抵消脂质诱导的应激反应

在高脂饮食或肥胖小鼠的肝脏中,CLCC1蛋白水平显著下降【图5g】,暗示它在代谢压力下是“脆弱”的。

当在肥胖小鼠肝脏中“重新补充”CLCC1后,脂肪堆积和肝损伤指标都得到显著改善【图5j, k】。

这一结果不仅印证了CLCC1在脂质稳态中的核心地位,更揭示了它作为潜在“治疗靶点”的价值。

文章小结

Summary of the article

本研究揭示了CLCC1协同TMEM41B维持ER膜磷脂平衡的核心功能,其缺失会引发磷脂失衡与脂质异常堆积,加速代谢相关脂肪性肝炎的病理进程,为干预代谢性疾病提供了新靶点!

有生信分析需求的同学快来联系生信百事通吧!有消息一定及时回复!

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  1. CONNECT:[ UseTime:0.000484s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000630s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001245s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.005352s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000638s ]
  6. SELECT * FROM `set` [ RunTime:0.002992s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000630s ]
  8. SELECT * FROM `article` WHERE `id` = 502833 LIMIT 1 [ RunTime:0.004335s ]
  9. UPDATE `article` SET `lasttime` = 1774937610 WHERE `id` = 502833 [ RunTime:0.000760s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000261s ]
  11. SELECT * FROM `article` WHERE `id` < 502833 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000496s ]
  12. SELECT * FROM `article` WHERE `id` > 502833 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000370s ]
  13. SELECT * FROM `article` WHERE `id` < 502833 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003751s ]
  14. SELECT * FROM `article` WHERE `id` < 502833 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004589s ]
  15. SELECT * FROM `article` WHERE `id` < 502833 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006335s ]
0.105805s