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miR‑106b‑5p promotes cell cycle progression of malignant melanoma by targeting PTEN

Xu-Ε Chen1, Pu Chen2, Shan-Shan Chen1

  • 1Department of Dermatology, Guizhou Provincial People's Hospital, Guiyang, Guizhou 550002, P.R. China.

Oncology Reports
|December 2, 2017
PubMed

Insights

MicroRNA-106b-5p (miR-106b-5p) promotes malignant melanoma (MM) progression by targeting PTEN, accelerating cell cycle and growth. This microRNA may serve as a therapeutic target for MM treatment.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Malignant melanoma (MM) is an aggressive skin cancer with complex regulatory mechanisms.
  • MicroRNAs (miRNAs) play crucial roles in cancer development and progression.
  • The specific role of miR-106b-5p in MM cell cycle regulation requires further elucidation.

Purpose of the Study:

  • To investigate the role of miR-106b-5p/PTEN signaling in regulating the cell cycle of malignant melanoma cells.
  • To explore the downstream targets and pathways affected by miR-106b-5p in MM.

Main Methods:

  • Quantitative real-time PCR (qRT-PCR) to identify miR-106b-5p expression.
  • Transient transfection for upregulation/downregulation of miR-106b-5p and PTEN.
  • MTT assay, colony formation assay, and flow cytometry to assess cell proliferation and cell cycle.
  • Western blot analysis for protein quantification.
  • Luciferase reporter assay to validate PTEN as a direct target of miR-106b-5p.

Main Results:

  • miR-106b-5p was overexpressed in MM tissues and cell lines.
  • Upregulation of miR-106b-5p accelerated MM cell growth and shortened cell cycles; knockdown showed opposite effects.
  • miR-106b-5p directly targets PTEN, regulating its expression post-transcriptionally.
  • miR-106b-5p stimulates cyclin D1 and suppresses P27Kip1 via the Akt/ERK pathway.

Conclusions:

  • miR-106b-5p acts as a promoter in malignant melanoma progression.
  • The miR-106b-5p/PTEN axis influences MM cell cycle regulation.
  • Targeting miR-106b-5p may offer a potential therapeutic strategy for MM.

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