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miR-219a-5p represses migration and invasion of osteosarcoma cells via targeting EYA2

Xitian Zhu1, Lei Chen1, Jianhua Lin1

  • 1a Department of Orthopaedic , The First Affiliated Hospital of Fujian Medical University , Fuzhou , Fujian Province , China.

Artificial Cells, Nanomedicine, and Biotechnology
|November 20, 2018
PubMed

Insights

EYA2 expression is elevated in osteosarcoma (OS). MiR-219a-5p acts as a tumor suppressor by inhibiting EYA2, thereby reducing OS cell invasion and migration.

Area of Science:

  • Molecular Biology
  • Oncology
  • Gene Regulation

Background:

  • EYA2 (eyes absent homolog 2) is a transcription factor and phosphatase involved in cell death and differentiation.
  • Dysregulation of EYA2 is implicated in various cancers, but its role in osteosarcoma (OS) is not well understood.

Purpose of the Study:

  • To investigate the expression and function of EYA2 in osteosarcoma.
  • To elucidate the regulatory relationship between EYA2 and microRNAs in OS.

Main Methods:

  • Quantitative analysis of EYA2 expression in OS tissues and cell lines.
  • Bioinformatic prediction and dual-luciferase reporter assay to identify EYA2-targeting miRNAs.
  • In vitro assays (cell invasion and migration) to assess the functional roles of EYA2 and miR-219a-5p.

Main Results:

  • EYA2 expression was significantly upregulated in osteosarcoma tissues and cell lines.
  • MiR-219a-5p was identified as a direct repressor of EYA2 by binding to its 3'-UTR.
  • Overexpression of miR-219a-5p suppressed OS cell invasion and migration, while EYA2 overexpression reversed this effect. Conversely, silencing miR-219a-5p promoted invasion and migration, which was reversed by EYA2 silencing.

Conclusions:

  • MiR-219a-5p functions as a tumor suppressor in osteosarcoma.
  • MiR-219a-5p inhibits OS cell invasiveness and migration by repressing EYA2 expression.
Keywords:
EYA2OsteosarcomainvasionmiR-219a-5pmigration

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