当前位置:首页>深圳>Adv.Sci. | 深圳大学王子梅/敖英团队发现:保护心脏线粒体,可逆转心肌纤维化

Adv.Sci. | 深圳大学王子梅/敖英团队发现:保护心脏线粒体,可逆转心肌纤维化

  • 2026-06-18 22:05:01
Adv.Sci. | 深圳大学王子梅/敖英团队发现:保护心脏线粒体,可逆转心肌纤维化

心力衰竭已成为全球重大健康威胁,而心肌纤维化是心衰进展的核心病理标志 —— 心脏肌肉被过量胶原 “硬化”,导致心室僵硬、泵血能力下降。但长期以来,医学界始终没找到纤维化最初从哪里启动。

近日,深圳大学医学部基础医学院王子梅/敖英团队在国际权威期刊《Advanced Science》发表重磅研究,揭示了一个此前未被发现的“细胞骨架-线粒体”质量控制轴,为对抗心肌纤维化提供了全新的治疗靶点。

研究团队通过多物种转录组数据与动物模型验证,率先发现酪蛋白激酶 2α(CK2α)在心肌细胞中的特异性下调,是心肌纤维化最早、最保守的触发信号。在心梗、异丙肾上腺素诱导等多种纤维化心脏中,CK2α 水平显著降低,且下降越早、纤维化越严重,这一变化在损伤后 1 天就会出现,远早于组织瘢痕形成。

为验证因果关系,团队构建了心肌细胞特异性 CK2α 敲除小鼠。结果显示,年轻小鼠无异常,但老年小鼠会自发出现严重纤维化,心脏射血分数大幅下降,证明 CK2α 缺失足以驱动纤维化发生。进一步实验发现,CK2α 缺陷的心肌细胞会通过旁分泌释放 IL‑6、TGF‑β1,直接激活心脏成纤维细胞,加速胶原沉积,形成 “损伤‑炎症‑纤维化” 的恶性循环。

CK2α缺陷的心肌细胞通过旁分泌信号促进心肌成细胞激活

机制上,这项研究最具突破性的发现是CK2α–Desmin–线粒体质控轴。CK2α 可直接结合并磷酸化细胞骨架蛋白结蛋白(Desmin)的第 452 位苏氨酸,这一修饰能招募分子伴侣 αB‑晶状体蛋白,阻止 Desmin 病理性聚集。一旦 CK2α 缺失,Desmin 异常聚集,线粒体结构迅速崩塌,呼吸链复合物全面瓦解,ATP 含量暴跌 32.7%,同时 ROS 暴增、线粒体 DNA 泄漏,激活 NF‑κB 炎症通路,全面引爆心肌损伤。

CK2α缺失会诱导线粒体损伤并促进心脏纤维化

更具转化价值的是,研究团队采用AAV9 病毒载体,在心肌细胞中特异性恢复 CK2α 表达。在应激诱导的纤维化模型中,这一干预成功保护线粒体结构、逆转氧化应激,显著减少纤维化面积,恢复心脏收缩功能,为心衰基因治疗提供了直接实验依据。

AAV9介导的CK2α过表达可防止异脯氨酸诱导的心肌纤维化和线粒体功能障碍

该研究彻底改变了既往对 CK2 的认知,证明其在心肌细胞中是抗纤维化保护因子,而非促纤维化因子。同时提出 “获得性结蛋白病” 新概念,揭示线粒体‑细胞骨架对话是心脏稳态的核心检查点。这项成果不仅为心肌纤维化提供了CK2α这一全新早期诊断标志物,更确立了 AAV9‑CK2α 基因治疗、靶向 Desmin 磷酸化等干预策略,为顽固性心衰、纤维化心脏病开辟了全新治疗方向,让逆转心脏硬化成为可能。

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  1. CONNECT:[ UseTime:0.000495s ] mysql:host=127.0.0.1;port=3306;dbname=c460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000758s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000342s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000293s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000474s ]
  6. SELECT * FROM `set` [ RunTime:0.000221s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000576s ]
  8. SELECT * FROM `article` WHERE `id` = 581881 LIMIT 1 [ RunTime:0.000479s ]
  9. UPDATE `article` SET `lasttime` = 1782377204 WHERE `id` = 581881 [ RunTime:0.011780s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000417s ]
  11. SELECT * FROM `article` WHERE `id` < 581881 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000589s ]
  12. SELECT * FROM `article` WHERE `id` > 581881 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000365s ]
  13. SELECT * FROM `article` WHERE `id` < 581881 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004319s ]
  14. SELECT * FROM `article` WHERE `id` < 581881 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003814s ]
  15. SELECT * FROM `article` WHERE `id` < 581881 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.010323s ]
0.104516s