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Article / Publication Details

First-Page Preview

Received: April 27, 2021
Accepted: August 08, 2021
Published online: January 18, 2022

Number of Print Pages: 12
Number of Figures: 5
Number of Tables: 1

ISSN: 0009-3157 (Print)
eISSN: 1421-9794 (Online)

For additional information: https://www.karger.com/CHE

Abstract

Introduction: Changes in microRNAs (miRs) contribute to the alternative chemo-resistance of cancers. Bortezomib (BTZ) is a well-characterized anticancer agent that inhibits proteasome, and its effect is associated with the function of miRs. Based on the data of microarray assay and comprehensive bioinformatics analyses, in the current study, we explored the role of miR-466 and its downstream effector CCND1 in the BTZ-resistance of non-small-cell lung cancer (NSCLC) cells. Methods: miR expression profiles in NSCLC tissues and paratumor tissues were determined with microarray assay. The potential miR involved in the chemo-resistance of NSCLC cells was explored via a series of bioinformatics analyses, and miR-466 was selected. Afterward, levels of miR-466 and CCND1 were investigated in NSCLC samples and analyzed by clinicopathologic parameters, including age, sex, stage of NSCLC, tumor size, tumor differentiation status, and lymphocytic infiltration status. The expression of CCND1 and miR-466 was then modulated in vitro to explore the influence on cell phenotypes, which was then verified with mouse models. Results: Based on microarray detection, 287 miRs were dysexpressed between NSCLC tissues and paratumor tissues, including 90 upregulated members and 197 downregulated members. After bioinformatics analyses and reverse transcription quantitative PCR validation, miR-466 and CCND1 were selected. Following clinical investigations, miR-466 was downregulated, while CCND1 was upregulated in NSCLC samples, contributing to the advanced cancer progression. The overexpression of CCND1 increased cell viability, suppressed cell apoptosis, decreased p21 and induced N-cadherin, CCND2, and CDK4 under BTZ treatment. The induced expression of miR-466 re-sensitized NSCLC cells to BTZ treatment. In the animal model, the overexpression of CCND1 impaired the inhibitory effect of BTZ on the growth and metastasis of solid tumor, which was restored by miR-466 induction. Conclusion: The findings showed that the interaction between BTZ, miR-466, and CCND1 determined the antitumor effect of BTZ on NSCLC.

© 2022 S. Karger AG, Basel

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First-Page Preview

Received: April 27, 2021
Accepted: August 08, 2021
Published online: January 18, 2022

Number of Print Pages: 12
Number of Figures: 5
Number of Tables: 1

ISSN: 0009-3157 (Print)
eISSN: 1421-9794 (Online)

For additional information: https://www.karger.com/CHE