转胺酶2激活与胸前大动脉剖析有关,通过破坏内皮附着结的结合
Xinyao Li1, Weixin Zhang2, Jie Gao2
1The School of Pharmacy, Fujian Medical University, Fuzhou, China; Fujian Center for Safety Evaluation of New Drug, Fujian Medical University, Fuzhou, China.
European journal of pharmacology
|January 23, 2026
概括
内皮转胺酶2 (TGM2) 通过破坏细胞结节来驱动胸前大动脉解剖 (TAD). 在大鼠模型中抑制TGM2降低了TAD的严重性和死亡率,突出了TGM2作为治疗点.
科学领域:
- 血管生物学 血管生物学
- 分子医学是分子医学.
- 大动脉疾病的发病因子
背景情况:
- 胸前动脉解剖 (TAD) 是一种危及生命的疾病,通常与中枢退行有关.
- 内皮功能障碍越来越被认为是TAD的关键发起事件.
- 在TAD中内皮损伤的特定分子媒介还没有得到很好的定义.
研究的目的:
- 为了研究转质胺酶2 (TGM2) 在内皮中的作用,作为TAD病变发生的潜在驱动因素.
- 阐明内皮TGM2对TAD有所贡献的分子机制.
- 在TAD模型中评估TGM2抑制的治疗潜力.
主要方法:
- 使用β-aminopropionitrile (BAPN) 诱导的TAD和传输电子显微镜的老鼠模型.
- 评估TGM2表达在患有TAD的人类患者和老鼠的大动脉组织中.
- 在实验室中使用人类大动脉内皮细胞 (HAEC) 进行了TGM2敲击或过度表达的研究.
- 在体内研究了TGM2抑制剂囊胺二化物 (Cys-D) 的作用.
主要成果:
- 在TAD患者和老鼠的大动脉内脏中,TGM2的表达显著升高,特别是在受损区域内.
- 在体外,TGM2的淘汰保护了内皮结的完整性,而过度表达则恶化了功能障碍.
- 通过NF-κB通路,TGM2激活促进了内皮功能障碍,降低VE-cadherin的调节,并提高MMP2的调节.
- 在体内,TGM2抑制与Cys-D减弱了大动脉内脏的加厚,恢复了内皮完整性,并降低了大鼠TAD相关的死亡率.
结论:
- 内皮TGM2在启动和驱动TAD病变发生方面发挥着关键的,以前未被认可的作用.
- 通过破坏内皮细胞结合和促进细胞外基质降解,TGM2有助于TAD.
- 向内皮TGM2代表了胸前大动脉剖析的一个有前途的治疗策略.
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