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Etoposide-induced MicroRNA-205-5p Suppresses Proliferation and Migration by Targeting ERBB4 in MCF-7 Cells

Seung Wan Son1, Seung Hyeok Heo1, Sang Su Oh2

  • 1Department of Biomedical Science, Hallym University, Chuncheon, Republic of Korea.

Anticancer Research
|August 30, 2022
PubMed
Abstract

Insights

Etoposide, an anti-cancer drug, inhibits breast cancer cell growth and migration. It increases microRNA-205-5p (miRNA-205-5p) levels, which targets ERBB4, offering new therapeutic strategies.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Breast cancer presents a significant therapeutic challenge due to limited effective treatments.
  • MicroRNAs (miRNAs) are implicated in cancer progression and are often dysregulated in malignancies.
  • miRNA-205-5p (miRNA-205-5p) is investigated for its role in breast cancer.

Purpose of the Study:

  • To investigate the anti-cancer effects of etoposide and miRNA-205-5p in MCF-7 breast cancer cells.
  • To explore the relationship between etoposide treatment and miRNA-205-5p expression.
  • To identify the molecular targets of miRNA-205-5p in breast cancer.

Main Methods:

  • Cell proliferation and migration assays were performed using monolayer and spheroid cultures.
  • Quantitative real-time PCR was used to measure mRNA and miRNA levels.
  • Luciferase and Western blot assays validated the target gene of miRNA-205-5p.

Main Results:

  • Etoposide treatment suppressed proliferation and migration in MCF-7 monolayers and inhibited spheroid growth.
  • Etoposide was found to upregulate miRNA-205-5p expression.
  • Overexpression of miRNA-205-5p inhibited cell proliferation and migration by directly targeting ERBB4.

Conclusions:

  • miRNA-205-5p acts as a mediator of etoposide's anti-cancer effects.
  • miRNA-205-5p-based therapies hold promise for expanding breast cancer treatment options.
Keywords:
ERBB4Etoposidebreast cancermiRNA-205-5pmicroRNAspheroid

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