非小细胞肺癌 (NSCLC) 的发病仍然笼罩在迷雾中。LUCAT1 可能能够通过靶向 SRSF1 调节 MCL-1 参与的 NSCLC 发病机制。此外,MCL-1 可调节 Wnt/β-catenin 通路以影响 NSCLC 的肿瘤发生。因此,本文旨在揭示 LUCAT1/SRSF1/MCL-1 轴在基于 Wnt/β-catenin 通路的 NSCLC 中有趣而新颖的作用。A549 和 NCI-H1650 是 NSCLC 的两种细胞系,用于体外模拟 NSCLC。MCL-1 siRNA (si-MCL-1) 和 LUCAT1 siRNA (si-LUCAT1) 分别用于下调 NSCLC 细胞中 MCL-1 和 LUCAT1。构建基于 pcDNA 3.1 的 SRSF1 过表达载体,上调 SRSF1 表达。使用 40 μM SKL2001 激活 Wnt/β-catenin 通路。Transwell 测定用于迁移和侵入性试验。LUCAT1 对肿瘤转移的影响在裸鼠中得到验证。MCL-1 下调导致 NSCLC 中 EMT 、侵袭和迁移的减少,而 Wnt/β-catenin 通路激动剂部分逆转了 MCL-1 下调的作用。机制调查显示 LUCAT1 和 MCL-1 mRNA 在 SRSF1 中富集;LUCAT1 沉默降低 MCL-1,而 SRSF1 增强升高 MCL-1;重要的是,由于 LUCAT1 沉默,SRSF1 过表达显着逆转了 MCL-1 改变。在 NSCLC 细胞中,SRSF1 过表达抵消了 si-LUCAT1 诱导的变化,而 si-MCL-1 逆转了 SRSF1 诱导的细胞变化。此外,LUCAT1 抑制减少了癌细胞的肺转移。LUCAT1 可与 SRSF1 相互作用以调节靶向 Wnt/β-catenin 通路介导的 NSCLC 细胞迁移、侵袭和 EMT 的 MCL-1 表达。
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Upregulation of MCL-1 by LUCAT1 through interacting with SRSF1 promotes the migration and invasion in non-small cell lung carcinoma
The onset of non-small cell lung carcinoma (NSCLC) still be in the fog. LUCAT1 is potentially capable of modulating MCL-1-involved NSCLC pathogenesis via targeting SRSF1. Also, MCL-1 can regulate Wnt/β-catenin pathway to affect the tumorigenesis of NSCLC. Thus, this paper aims to uncover an intriguing and novel role of LUCAT1/SRSF1/MCL-1 axis in NSCLC based on Wnt/β-catenin pathway. A549 and NCI-H1650, two cell lines of NSCLC, were used to mimic NSCLC in vitro. MCL-1 siRNA (si-MCL-1) and LUCAT1 siRNA (si-LUCAT1) were used to downregulate MCL-1 and LUCAT1 in NSCLC cells, respectively. The overexpression vector of SRSF1 based on pcDNA 3.1 was constructed to upregulate SRSF1 expression. 40 μM SKL2001 was used to activate Wnt/β-catenin pathway. Transwell assay was used for migrative and invasive tests. The effect of LUCAT1 on tumor metastasis was verified in nude mice. MCL-1 downregulation led to the decrease of EMT, invasion, and migration in NSCLC, while Wnt/β-catenin pathway agonist partially reversed the effects of MCL-1 downregulation. Mechanistic investigations revealed that LUCAT1 and MCL-1 mRNA were enriched in SRSF1; LUCAT1 silence decreased MCL-1, whereas SRSF1 enhancement elevated MCL-1; Importantly, SRSF1 overexpression significantly reversed MCL-1 alteration due to LUCAT1 silence. In NSCLC cells, SRSF1 overexpression offset the si-LUCAT1-induced changes, and si-MCL-1 reversed the SRSF1-induced cellular changes. Further, LUCAT1 inhibition reduced lung metastasis of cancer cells. LUCAT1 can interact with SRSF1 to regulate MCL-1 expression that targets the Wnt/β-catenin pathway-mediated NSCLC cell migration, invasion, and EMT.