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miRNA-221 promotes cutaneous squamous cell carcinoma progression by targeting PTEN

Zhen-Hua Gong1, Feng Zhou2, Chao Shi3

  • 1Department of Burn and Plastic Surgery, The First People's Hospital of Nantong, Nantong, 226001 China.

Cellular & Molecular Biology Letters
|March 21, 2019
PubMed
Abstract

Insights

MicroRNA-221 (miRNA-221) is elevated in cutaneous squamous cell carcinoma (CSCC), promoting tumor growth by targeting PTEN. This suggests miRNA-221 as a potential diagnostic and therapeutic target for CSCC.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Cutaneous squamous cell carcinoma (CSCC) is a prevalent skin cancer.
  • MicroRNA-221 (miRNA-221) is implicated in tumor development, but its role in CSCC is unclear.

Purpose of the Study:

  • To investigate miRNA-221 expression in CSCC.
  • To elucidate the molecular mechanisms and biological functions of miRNA-221 in CSCC development.

Main Methods:

  • Quantitative real-time PCR and Western blot assays.
  • Cell proliferation and cell cycle assays (MTT, colony formation).
  • Dual-luciferase reporter gene assay to identify miRNA targets.

Main Results:

  • miRNA-221 expression is significantly upregulated in CSCC tissues and cell lines compared to normal controls.
  • miRNA-221 knockdown suppresses CSCC cell proliferation and arrests the cell cycle.
  • PTEN was identified as a direct target of miRNA-221, with its expression reduced upon miRNA-221 mimic transfection.

Conclusions:

  • miRNA-221 promotes CSCC progression by targeting PTEN, indicating an oncogenic role.
  • miRNA-221 represents a potential biomarker for CSCC diagnosis and a therapeutic target.
Keywords:
Cutaneous squamous cell carcinomaPTENProliferationTreatmentmiRNA-221

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