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. 2020 Feb;24(4):1863-1869.
doi: 10.26355/eurrev_202002_20364.

Circular RNA_LARP4 inhibits the progression of non-small-cell lung cancer by regulating the expression of SMAD7

J-Q Shi  1 , B Wang, X-Q Cao, Y-X Wang, X Cheng, C-L Jia, T Wen, B-J Luo, Z-D Liu
Affiliations
Free article

Circular RNA_LARP4 inhibits the progression of non-small-cell lung cancer by regulating the expression of SMAD7

J-Q Shi et al. Eur Rev Med Pharmacol Sci. 2020 Feb.
Free article

Expression of concern in

  • Expression of Concern.
    Authors Listed N. Authors Listed N. Eur Rev Med Pharmacol Sci. 2025 Jun;29(6):287-288. doi: 10.26355/eurrev_202506_37270. Eur Rev Med Pharmacol Sci. 2025. PMID: 40613620

Abstract

Objective: Researchers have uncovered the importance of circular RNAs (circ) in malignant tumors. Circ LARP4 has been found to serve as a tumor suppressor gene in gastric cancer. However, the exact function of circ LARP4 in non-small-cell lung cancer (NSCLC) has not been fully elucidated. The aim of this study was to uncover the role of circ LARP4 in the tumorigenesis of NSCLC.

Patients and methods: Expression level of circ LARP4 in NSCLC tissues was detected through Real Time-quantitative Polymerase Chain Reaction (RT-qPCR). Subsequently, the association between expression and patients' prognosis was analyzed. Circ LARP4 lentivirus was constructed and transfected into NSCLC cells. The effect of circ LARP4 on NSCLC cell migration and invasion was detected by function assays. Furthermore, Western blot was performed to analyze the expression of predicted protein of circ LARP4.

Results: Compared with adjacent tissues, circ LARP4 was lowly expressed in NSCLC tissues. Meanwhile, expression of circ LARP4 was associated with the prognosis of NSCLC patients. Downregulated circ LARP4 was found in NSCLC cell lines as well. The migration and invasion abilities of NSCLC cells were significantly inhibited via overexpression of circ LARP4. SMAD7, the predicted protein of circ LARP4, increased remarkably via overexpression of circ LARP4.

Conclusions: Circ LARP4 could suppress the metastasis of NSCLC by up-regulating SMAD7.

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