COMP-PMEPA1轴在乳腺癌细胞中促进了上皮细胞转化为介质酶细胞的转变
Konstantinos S Papadakos1, Gilar Gorji-Bahri1, Lejla Gradjan1
1Division of Medical Protein Chemistry, Department of Translational Medicine, Lund University, Malmö, Sweden.
Molecular oncology
|February 14, 2026
概括
软骨的寡合基质基质蛋白 (COMP) 通过促进上皮细胞转移到介质细胞转移 (EMT) 来驱动乳腺癌转移. COMP-PMEPA1轴改变TGFβ信号传递,增加癌细胞迁移和入侵.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 皮质到介质细胞的过渡 (EMT) 对于癌症转移至关重要.
- 较高的软骨寡合矩阵蛋白 (COMP) 表达与乳腺癌患者的预后不佳相关.
- 在乳腺癌中调节EMT的COMP的作用尚不清楚.
研究的目的:
- 调查COMP在乳腺癌中驱动EMT中的功能.
- 确定涉及COMP介导EMT的分子机制和信号通路.
- 在乳腺癌进展中探索COMP-PMEPA1轴.
主要方法:
- 在体外研究中,使用复合组合的COMP和COMP过度表达的乳腺癌细胞.
- 在体内异种移植模型评估EMT特征.
- 对细胞迁移,入侵和信号通路激活 (TGFβ/SMAD) 的分析.
主要成果:
- 复合抗原药物治疗或过度表达导致上皮细胞标记物CDH1的降低和中细胞标记物 (VIM,VCAN) 的增加.
- COMP增强了乳腺癌细胞的迁移和入侵.
- 鉴定出 COMP-PMEPA1 相互作用是 COMP 诱导的 EMT 的关键媒介,改变 TGFβ 信号传递.
- COMP通过PMEPA1.1将SMAD激活从pSMAD2/3转移到pSMAD1/5
结论:
- 在乳腺癌中,COMP作为EMT的强有力的诱导剂.
- COMP-PMEPA1轴代表了一种驱动乳腺癌转移的新途径.
- 针对COMP-PMEPA1相互作用可能为乳腺癌提供治疗策略.
- 在TGFβ信号传递中,COMP诱导的改变有助于转移性进展.
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