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LncRNA MIR4435‐2HG‐mediated upregulation of TGF‐β1 promotes migration and proliferation of nonsmall cell lung cancer cells

The roles of long noncoding RNAs (lncRNAs) have been shown to play critical roles in tumor progression. Here, it was identified that lncRNA MIR4435‐2HG was highly expressed in lung cancer tissues, especially in nonsmall cell lung cancer (NSCLC). A consistent result was obtained in lung cancer cells. Functional experiments showed that knockdown of MIR4435‐2HG reduced the proliferation and migration ability of NSCLC cells. Transcriptome‐sequencing analysis indicated that TGF‐β signaling was mostly enriched in NSCLC cells with MIR4435‐2HG knockdown. Furthermore, MIR4435‐2HG was identified as an miRNA sponge for TGF‐β1 and thus activated TGF‐β signaling. Additionally, re‐activation of TGF‐β1 rescued MIR4435‐2HG knockdown‐mediated inhibition on the progression of NSCLC cells. Therefore, this work indicates a novel MIR4435‐2HG/TGF‐β1 axis responsible for NSCLC cell progression.