Zhang Yang, Yang Xuyang, Zhang Su, Huang Qing, Liu Sicheng, Qiu Lei, Wei Mingtian, Deng Xiangbing, Meng Wenjian, Chen Hai-Ning, Zhang Yaguang, Han Junhong, Wang Ziqiang
Colorectal Cancer Center.
Department of General Surgery, and.
JCI Insight. 2025 Jun 10;10(14). doi: 10.1172/jci.insight.189503. eCollection 2025 Jul 22.
The prognosis for colorectal cancer (CRC) patients with liver metastasis remains poor, and the molecular mechanisms driving CRC liver metastasis are not fully understood. Tumor-derived hypoxia-induced extracellular vesicles have emerged as key players in inducing angiogenesis by transferring noncoding RNAs. However, the specific role of CRC-derived hypoxic extracellular vesicles (H-EVs) in regulating premetastatic microenvironment (PMN) formation by inducing angiogenesis remains unclear. Our study demonstrates that H-EVs induce angiogenesis and liver metastasis. Through microRNA microarray analysis, we identified a reduction in miR-6084 levels within H-EVs. We found that miR-6084 inhibited angiogenesis by being transferred to endothelial cells via EVs. In endothelial cells, miR-6084 directly targeted angiopoietin like 4 (ANGPTL4) mRNA, thereby suppressing angiogenesis through the ANGPTL4-mediated JAK2/STAT3 pathway. Furthermore, we uncovered that specificity protein 1 (SP1) acted as a transcription factor regulating miR-6084 transcription, while hypoxia-inducible factor 1A (HIF1A) decreased miR-6084 expression by promoting SP1 protein dephosphorylation and facilitating ubiquitin-proteasome degradation in SW620 cells. In clinical samples, we observed low expression of miR-6084 in plasma-derived EVs from CRC patients with liver metastasis. In summary, our findings suggest that CRC-derived H-EVs promote angiogenesis and liver metastasis through the HIF1A/SP1/miR-6084/ANGPTL4 axis. Additionally, miR-6084 holds promise as a diagnostic and prognostic biomarker for CRC liver metastasis.
结直肠癌(CRC)肝转移患者的预后仍然很差,驱动CRC肝转移的分子机制尚未完全明确。肿瘤来源的缺氧诱导细胞外囊泡已成为通过转移非编码RNA诱导血管生成的关键因素。然而,CRC来源的缺氧细胞外囊泡(H-EVs)在通过诱导血管生成调节转移前微环境(PMN)形成中的具体作用仍不清楚。我们的研究表明,H-EVs诱导血管生成和肝转移。通过microRNA微阵列分析,我们发现H-EVs中miR-6084水平降低。我们发现miR-6084通过EVs转移到内皮细胞来抑制血管生成。在内皮细胞中,miR-6084直接靶向血管生成素样4(ANGPTL4)mRNA,从而通过ANGPTL4介导的JAK2/STAT3途径抑制血管生成。此外,我们发现特异性蛋白1(SP1)作为调节miR-6084转录的转录因子,而缺氧诱导因子1A(HIF1A)通过促进SP1蛋白去磷酸化并促进SW620细胞中泛素-蛋白酶体降解来降低miR-6084表达。在临床样本中,我们观察到来自CRC肝转移患者血浆来源的EVs中miR-6084表达较低。总之,我们的研究结果表明,CRC来源的H-EVs通过HIF1A/SP1/miR-6084/ANGPTL4轴促进血管生成和肝转移。此外,miR-6084有望成为CRC肝转移的诊断和预后生物标志物。
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