来自COPD患者的细胞外囊泡通过HIF-1α穿方式调节癌症发起细胞表型
Ilaria Petraroia1, Patrizia Ghidotti1, Giulia Bertolini2
1Epigenomics and biomarkers of solid tumors, Fondazione IRCCS Istituto Nazionale dei Tumori, Milano, Italy.
Cell death & disease
|October 14, 2023
概括
慢性阻塞性肺病 (COPD) 患者的细胞外囊泡 (EV) 通过激活HIF-1α-CXCR4通路来促进肺癌. 这增强了转移启动细胞,表明EVs是将COPD与肺癌进展联系起来的机制.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 在瘤学瘤学.
- 肺部病理学 肺部病理学
背景情况:
- 慢性阻塞性肺病 (COPD) 是已知的肺癌发展的风险因素.
- 慢性肺炎病原包括缺氧诱导的信号,改变细胞微环境和细胞外囊泡 (EV) 释放.
- 从COPD患者中循环EVs在启动或促进肺癌中的确切作用尚不清楚.
研究的目的:
- 调查来自COPD患者的循环EVs的前瘤潜力.
- 阐明COPD衍生的EVs在上皮细胞中影响肺癌发展的机制.
- 确定特定的分子通路,如HIF-1α和CXCR4,是否调解COPD-EVs的影响.
主要方法:
- 根据MISEV指南,从患有或没有COPD的重度吸烟者身上分离和描述血EV.
- 在体外测试血-EVs在具有瘤变异的永生人类支气管上皮细胞上的亲瘤活性 (sh-p53,KRASV12).
- 评估转移启动细胞 (MIC) 扩张,3D生长,迁移,入侵和介质细胞特征.
- 涉及缺氧诱导因子1-alpha (HIF-1α) 转移,CXCR4通路激活和抑制实验的机制研究.
主要成果:
- 从COPD衍生的EVs (COPD-EVs) 在具有sh-p53和KRASV12高突变的细胞中选择性地增加了CD133+CXCR4+转移启动细胞 (MIC),促进3D生长,迁移,入侵和介质细胞特征.
- 在单个瘤突变的细胞中没有观察到这些亲瘤原生效应.
- 从COPD-EVs转移HIF-1α激活了CXCR4通路,调解MIC扩张和恶性表型,HIF-1α抑制或CXCR4沉默扭转了这种效应.
- 在COPD患者的EV中发现了较高的HIF-1α水平,这些患者后来患上了癌症,与那些没有癌症的人相比.
结论:
- 来自COPD患者的循环EV具有前瘤性质,显著促进MIC在前瘤肺上皮细胞中的扩张.
- HIF-1α-CXCR4轴是COPD-EVs驱动肺癌发病和进展的关键机制.
- 这些发现强调了COPD相关的EV和肺癌发展之间的潜在联系,这表明了新的治疗或诊断目标.
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