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Background <p>MicroRNA (miRNA) plays a crucial role in initiating and progressing non-small cell lung cancer (NSCLC).</p> Aim <p>This study aims to investigate the expression and prognostic value of miR-323b-5p in NSCLC patients, and to clarify the mechanisms of miR-323b-5p and IL1A on the proliferation and cell cycle of NSCLC cells.</p> Methods <p>Differentially expressed miRNAs were screened from the GSE171517 dataset. 120 NSCLC patients and 60 healthy controls were collected. RT-qPCR was used to detect miR-323b-5p and interleukin 1α (IL1A). Prognostic value was analyzed via Kaplan-Meier and Cox regression. Target genes of miR-323b-5p were predicted using TargetScan/miRDB and validated by dual-luciferase assay. Cell proliferation was detected by cell counting kit-8 (CCK-8). Cell cycle was detected by flow cytometry. The expression of cyclin-dependent kinase inhibitor 1&#xa0;A (P21), cyclin D1 (CCND1) and cyclin dependent kinase 4 (CDK4) was detected by western blot and RT-qPCR.</p> Results <p>miR-323b-5p was significantly downregulated in NSCLC serum samples and A549, HCC827, and NCI-H1299 cell lines. Low miR-323b-5p correlated with poorer 5-year survival rate and was a prognostic risk factor for NSCLC. IL1A was a direct target of miR-323b-5p. miR-323b-5p mimics can inhibit the proliferation of A549, HCC827, and NCI-H1299 cells, arrest the cell cycle to the S phase, promote P21, and inhibit the expression of CCND1 and CDK4. Overexpression of IL1A can partially reverse the above phenomena.</p> Conclusions <p>Low levels of miR-323b-5p predict a poor prognosis for NSCLC. miR-323b-5p regulates the cell cycle of NSCLC cells by targeting IL1A, thereby inhibiting cell proliferation.</p>

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The prognostic value of miR-323b-5p in non-small cell lung cancer and its mechanism of targeting IL1A in regulating the proliferation and cell cycle of non-small cell lung cancer cells

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月23日

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  • Yong Wu,
  • Zimian Duan,
  • Dong Yan,
  • Jingjing Yue,
  • Chunxi Liu

摘要

Background

MicroRNA (miRNA) plays a crucial role in initiating and progressing non-small cell lung cancer (NSCLC).

Aim

This study aims to investigate the expression and prognostic value of miR-323b-5p in NSCLC patients, and to clarify the mechanisms of miR-323b-5p and IL1A on the proliferation and cell cycle of NSCLC cells.

Methods

Differentially expressed miRNAs were screened from the GSE171517 dataset. 120 NSCLC patients and 60 healthy controls were collected. RT-qPCR was used to detect miR-323b-5p and interleukin 1α (IL1A). Prognostic value was analyzed via Kaplan-Meier and Cox regression. Target genes of miR-323b-5p were predicted using TargetScan/miRDB and validated by dual-luciferase assay. Cell proliferation was detected by cell counting kit-8 (CCK-8). Cell cycle was detected by flow cytometry. The expression of cyclin-dependent kinase inhibitor 1 A (P21), cyclin D1 (CCND1) and cyclin dependent kinase 4 (CDK4) was detected by western blot and RT-qPCR.

Results

miR-323b-5p was significantly downregulated in NSCLC serum samples and A549, HCC827, and NCI-H1299 cell lines. Low miR-323b-5p correlated with poorer 5-year survival rate and was a prognostic risk factor for NSCLC. IL1A was a direct target of miR-323b-5p. miR-323b-5p mimics can inhibit the proliferation of A549, HCC827, and NCI-H1299 cells, arrest the cell cycle to the S phase, promote P21, and inhibit the expression of CCND1 and CDK4. Overexpression of IL1A can partially reverse the above phenomena.

Conclusions

Low levels of miR-323b-5p predict a poor prognosis for NSCLC. miR-323b-5p regulates the cell cycle of NSCLC cells by targeting IL1A, thereby inhibiting cell proliferation.