Open Access

Long non‑coding RNA DANCR aggravates breast cancer through the miR‑34c/E2F1 feedback loop

  • Authors:
    • Shuai Yan
    • Lizhi Teng
    • Juntong Du
    • Liang Ji
    • Peng Xu
    • Wenxi Zhao
    • Weiyang Tao
  • View Affiliations

  • Published online on: April 5, 2024     https://doi.org/10.3892/mmr.2024.13217
  • Article Number: 93
  • Copyright: © Yan et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Emerging scientific evidence has suggested that the long non‑coding (lnc)RNA differentiation antagonizing non‑protein coding RNA (DANCR) serves a significant role in human tumorigenesis and cancer progression; however, the precise mechanism of its function in breast cancer remains to be fully understood. Therefore, the objective of the present study was to manipulate DANCR expression in MCF7 and MDA‑MB‑231 cells using lentiviral vectors to knock down or overexpress DANCR. This manipulation, alongside the analysis of bioinformatics data, was performed to investigate the potential mechanism underlying the role of DANCR in cancer. The mRNA and/or protein expression levels of DANCR, miR‑34c‑5p and E2F transcription factor 1 (E2F1) were assessed using reverse transcription‑quantitative PCR and western blotting, respectively. The interactions between these molecules were validated using chromatin immunoprecipitation and dual‑luciferase reporter assays. Additionally, fluorescence in situ hybridization was used to confirm the subcellular localization of DANCR. Cell proliferation, migration and invasion were determined using 5‑ethynyl‑2'‑deoxyuridine, wound healing and Transwell assays, respectively. The results of the present study demonstrated that DANCR had a regulatory role as a competing endogenous RNA and upregulated the expression of E2F1 by sequestering miR‑34c‑5p in breast cancer cells. Furthermore, E2F1 promoted DANCR transcription by binding to its promoter in breast cancer cells. Notably, the DANCR/miR‑34c‑5p/E2F1 feedback loop enhanced cell proliferation, migration and invasion in breast cancer cells. Thus, these findings suggested that targeting DANCR may potentially provide a promising future therapeutic strategy for breast cancer treatment.
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June-2024
Volume 29 Issue 6

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Copy and paste a formatted citation
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Spandidos Publications style
Yan S, Teng L, Du J, Ji L, Xu P, Zhao W and Tao W: Long non‑coding RNA DANCR aggravates breast cancer through the miR‑34c/E2F1 feedback loop. Mol Med Rep 29: 93, 2024.
APA
Yan, S., Teng, L., Du, J., Ji, L., Xu, P., Zhao, W., & Tao, W. (2024). Long non‑coding RNA DANCR aggravates breast cancer through the miR‑34c/E2F1 feedback loop. Molecular Medicine Reports, 29, 93. https://doi.org/10.3892/mmr.2024.13217
MLA
Yan, S., Teng, L., Du, J., Ji, L., Xu, P., Zhao, W., Tao, W."Long non‑coding RNA DANCR aggravates breast cancer through the miR‑34c/E2F1 feedback loop". Molecular Medicine Reports 29.6 (2024): 93.
Chicago
Yan, S., Teng, L., Du, J., Ji, L., Xu, P., Zhao, W., Tao, W."Long non‑coding RNA DANCR aggravates breast cancer through the miR‑34c/E2F1 feedback loop". Molecular Medicine Reports 29, no. 6 (2024): 93. https://doi.org/10.3892/mmr.2024.13217