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microRNA-204 shuttled by mesenchymal stem cell-derived exosomes inhibits the migration and invasion of non-small-cell lung cancer cells via the KLF7/AKT/HIF-1α axis.
Neoplasma ( IF 2.0 ) Pub Date : 2021-04-13 , DOI: 10.4149/neo_2021_201208n1328
Xiao-Ni Liu 1 , Chui-Bin Zhang 1 , Hai Lin 1 , Xiao-Yuan Tang 1 , Rong Zhou 1 , Hui-Lan Wen 1 , Jie Li 1
Affiliation  

Non-small-cell lung cancer (NSCLC) remains the leading cause of cancer-related death worldwide. Accumulating researches have highlighted the ability of exosome-encapsulated microRNAs (miRNAs or miRs) as potential circulating biomarkers for lung cancer. The current study aimed to evaluate the significance of mesenchymal stem cells (MSCs)-derived exosomal miR-204 in the invasion, migration, and epithelial-mesenchymal transition (EMT) of NSCLC cells. Initially, the expression of miR-204 in human NSCLC tissues and cells was determined by RT-qPCR, which demonstrated that miR-204 was downregulated in NSCLC tissues and cells. Next, Krüppel-like factor 7 (KLF7) was predicted and validated to be a target of miR-204 using dual-luciferase reporter gene assay. NSCLC A549 cells were treated with MSCs-derived exosomes, after which the migration and invasion of A549 cells were detected and expression of EMT-related proteins (E-cadherin, N-cadherin, and Vimentin), KLF7, p-AKT/AKT, and HIF-1α were measured. The results of gain- and loss-of-function assays revealed that miR-204 overexpression in MSCs-derived exosomes inhibited KLF7 expression and the AKT/HIF-1α pathway activity, resulting in impaired cell migration, invasion, as well as EMT. In conclusion, the key findings of the current study demonstrate that exosomal miR-204 from MSCs possesses anticarcinogenic properties against NSCLC via the KLF7/AKT/HIF-1α axis.

中文翻译:

间充质干细胞来源的外泌体穿梭的 microRNA-204 通过 KLF7/AKT/HIF-1α 轴抑制非小细胞肺癌细胞的迁移和侵袭。

非小细胞肺癌 (NSCLC) 仍然是全球癌症相关死亡的主要原因。越来越多的研究强调了外泌体包裹的 microRNA(miRNA 或 miR)作为肺癌潜在循环生物标志物的能力。本研究旨在评估间充质干细胞 (MSCs) 衍生的外泌体 miR-204 在 NSCLC 细胞的侵袭、迁移和上皮-间质转化 (EMT) 中的意义。最初,通过 RT-qPCR 测定人类 NSCLC 组织和细胞中 miR-204 的表达,这表明 miR-204 在 NSCLC 组织和细胞中下调。接下来,使用双荧光素酶报告基因分析预测并验证 Krüppel 样因子 7 (KLF7) 是 miR-204 的靶标。用 MSCs 衍生的外泌体处理 NSCLC A549 细胞,之后检测 A549 细胞的迁移和侵袭,并测量 EMT 相关蛋白(E-cadherin、N-cadherin 和 Vimentin)、KLF7、p-AKT/AKT 和 HIF-1α 的表达。功能增益和功能丧失测定的结果显示,MSCs 衍生的外泌体中 miR-204 过表达抑制 KLF7 表达和 AKT/HIF-1α 通路活性,导致细胞迁移、侵袭和 EMT 受损。总之,本研究的主要发现表明,来自 MSCs 的外泌体 miR-204 通过 KLF7/AKT/HIF-1α 轴具有抗 NSCLC 的抗癌特性。功能增益和功能丧失测定的结果显示,MSCs 衍生的外泌体中 miR-204 过表达抑制 KLF7 表达和 AKT/HIF-1α 通路活性,导致细胞迁移、侵袭和 EMT 受损。总之,本研究的主要发现表明,来自 MSCs 的外泌体 miR-204 通过 KLF7/AKT/HIF-1α 轴具有抗 NSCLC 的抗癌特性。功能增益和功能丧失测定的结果显示,MSCs 衍生的外泌体中 miR-204 过表达抑制 KLF7 表达和 AKT/HIF-1α 通路活性,导致细胞迁移、侵袭和 EMT 受损。总之,本研究的主要发现表明,来自 MSCs 的外泌体 miR-204 通过 KLF7/AKT/HIF-1α 轴具有抗 NSCLC 的抗癌特性。
更新日期:2021-04-15
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