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MiRNA-188-5p alleviates the progression of osteosarcoma via target degrading CCNT2

F Wang1, Q-H Zhao, J-Z Liu

  • 1Department of Orthopedics, China-Japan Union Hospital Jilin University, Changchun, China. kingdragonflight@hotmail.com.

European Review for Medical and Pharmacological Sciences
|January 21, 2020
PubMed
Abstract

Insights

MicroRNA-188-5p (miRNA-188-5p) is downregulated in osteosarcoma, inhibiting cancer cell proliferation and progression. This microRNA targets and degrades CCNT2, playing a key role in osteosarcoma development.

Area of Science:

  • Molecular Biology
  • Oncology
  • Biochemistry

Background:

  • Osteosarcoma is a primary malignant bone tumor with a high mortality rate.
  • MicroRNAs (miRNAs) are crucial regulators of gene expression implicated in various cancers, including osteosarcoma.
  • Understanding the specific roles of miRNAs in osteosarcoma progression is vital for developing targeted therapies.

Purpose of the Study:

  • To investigate the biological role of microRNA-188-5p (miRNA-188-5p) in osteosarcoma.
  • To determine if miRNA-188-5p mediates osteosarcoma progression by targeting CCNT2.
  • To elucidate the regulatory mechanism of miRNA-188-5p in osteosarcoma cell proliferation and cell cycle.

Main Methods:

  • Quantitative Real-Time Polymerase Chain Reaction (qRT-PCR) to measure miRNA-188-5p and CCNT2 expression.
  • Cell Counting Kit-8 (CCK-8) and flow cytometry to assess cell proliferation and cell cycle.
  • Dual-Luciferase reporter gene assay to confirm the binding relationship between miRNA-188-5p and CCNT2.
  • Rescue experiments to validate the role of the miRNA-188-5p/CCNT2 axis.

Main Results:

  • MiRNA-188-5p expression was significantly lower in osteosarcoma tissues compared to normal tissues.
  • Overexpression of miRNA-188-5p inhibited osteosarcoma cell proliferation and induced cell cycle arrest.
  • Knockdown of miRNA-188-5p promoted proliferation and cell cycle progression.
  • CCNT2 was identified as a direct target of miRNA-188-5p, with its expression downregulated by miRNA-188-5p mimics.
  • Overexpression of CCNT2 partially reversed the inhibitory effects of miRNA-188-5p.

Conclusions:

  • MiRNA-188-5p is downregulated in osteosarcoma.
  • MiRNA-188-5p functions as a tumor suppressor in osteosarcoma.
  • MiRNA-188-5p suppresses osteosarcoma cell proliferation and cell cycle progression by targeting and degrading CCNT2.

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