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Long non-coding RNA PRSS23-AS1 as ceRNA promotes breast cancer progression by regulating EMT via miR-3176 /YBX1 axis

Abstract

Breast cancer (BC) remains a leading cause of cancer-related mortality, largely due to its aggressive proliferation and metastatic potential. Long non-coding RNAs (lncRNAs) have emerged as key regulators in tumor development and progression. This study explored the functional role and mechanism of Lnc-PRSS23-AS1 in BC. We assessed Lnc-PRSS23-AS1 expression and localization using fluorescence in situ hybridization, qRT-PCR, and Western blotting in BC tissues and cell lines. Binding interactions between Lnc-PRSS23-AS1, miR-3176, and Y-box binding protein 1 (YBX1) were validated through dual-luciferase reporter assays, RNA pulldown, and RNA immunoprecipitation. Lnc-PRSS23-AS1 was significantly upregulated in BC and predominantly localized in the cytoplasm. Silencing Lnc-PRSS23-AS1 or overexpressing miR-3176 suppressed BC cell proliferation, migration, and invasion in vitro and in vivo. Conversely, miR-3176 inhibition or YBX1 overexpression reversed these effects. Mechanistically, Lnc-PRSS23-AS1 promoted YBX1 protein expression by acting as a molecular sponge for miR-3176. These findings highlight the Lnc-PRSS23-AS1/miR-3176/YBX1 axis as a driver of BC progression and suggest Lnc-PRSS23-AS1 as a potential therapeutic target for breast cancer treatment.

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Fig. 1: Lnc-PRSS23-AS1 is highly expressed in BC cell lines and tissues.
Fig. 2: si-Lnc-PRSS23-AS1 affects BC cells progression, invasion, migration, and the expression of epithelial-mesenchymal transition (EMT) related proteins.
Fig. 3: Lnc-PRSS23-AS1 acts as a sponge of miR-3176 in BC.
Fig. 4: miR-3176 inhibits the progression, invasion, migration, and expression of EMT-related proteins in BC cells.
Fig. 5: miR-3176 directly binds to the 3’-UTR of YBX1 mRNA and suppresses YBX1 protein expression in BC cells.
Fig. 6: PcDNA3.1-YBX1 effectively counteracted the promotion of si-Lnc-PRSS23-AS1 or miR-3176 mimics on the invasion, migration, and the expression of EMT-related proteins in MCF7 cells.
Fig. 7: Suppressing miR-3176 expression attenuates the inhibition of si-Lnc-PRSS23-AS1 on BC progression in vivo.
Fig. 8

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Acknowledgements

We would like to thank all laboratory members for their discussion of this manuscript.

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Authors

Contributions

HY and FM conducted the molecular biology analyses, participated in designing the study and collecting clinical specimens, and drafted the manuscript. WM, JY, and WM collected clinical specimens, participated in data analysis, and performed statistical analyses. CZ and WM conceived and designed the study, participated in data analysis and coordination, and assisted in drafting the manuscript. All authors have read and approved the final manuscript.

Corresponding authors

Correspondence to Mingkun Wang or Zhen Cao.

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The present study received approval from the Sixth Medical Center of the PLA General Hospital (Beijing, China) and adhered to the Declaration of Helsinki. All procedures involving animal care and use were approved by the Experimental Animal Ethics Committee of the Beijing Geneline Bioscience Biotechnology Company and followed the National Policy on the Use of Laboratory Animals.

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Huang, Y., Feng, M., Jiang, Y. et al. Long non-coding RNA PRSS23-AS1 as ceRNA promotes breast cancer progression by regulating EMT via miR-3176 /YBX1 axis. Cancer Gene Ther 32, 1018–1029 (2025). https://doi.org/10.1038/s41417-025-00943-3

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