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TGF-β1 targets a microRNA network that regulates cellular adhesion and migration in renal cancer

Joanna Bogusławska1, Katarzyna Rodzik1, Piotr Popławski1

  • 1Department of Biochemistry and Molecular Biology, Centre of Postgraduate Medical Education, ul. Marymoncka 99/103, 01-813 Warsaw, Poland.

Cancer Letters
|October 29, 2017
PubMed

Insights

MicroRNAs regulate gene expression and are disturbed in renal tumors, impacting cellular adhesion. TGF-β1 coordinates this microRNA network, correlating with poor patient survival.

Area of Science:

  • Oncology
  • Molecular Biology
  • Gene Regulation

Background:

  • Altered expression of 19 adhesion-related genes was previously observed in renal tumors.
  • MicroRNAs (miRNAs), short non-coding RNAs, regulate gene expression and were hypothesized to influence these adhesion gene alterations.

Purpose of the Study:

  • To investigate the role of microRNAs in regulating adhesion-related genes in renal tumors.
  • To identify specific microRNAs targeting adhesion genes and their functional impact on renal cancer cells.
  • To explore the relationship between microRNA expression, TGF-β1, and patient survival.

Main Methods:

  • Analysis of microRNA expression in renal tumors.
  • Prediction and validation of microRNA targets among adhesion-related genes.
  • Functional assays assessing the impact of specific microRNAs on cancer cell proliferation, adhesion, and migration.
  • Correlation analysis of microRNA and target gene expression with TGF-β1 levels and patient survival data.

Main Results:

  • Expression of 24 microRNAs targeting adhesion genes was disturbed in renal tumors and correlated with their targets.
  • miR-25-3p, miR-30a-5p, miR-328, and miR-363-3p were identified as direct regulators of key adhesion genes (e.g., COL5A1, ITGA5).
  • Specific microRNAs demonstrated distinct functional roles: miR-363-3p and miR-328 inhibited proliferation, while miR-25-3p affected adhesion, proliferation, and migration.
  • A significant correlation network was found between analyzed microRNAs, target genes, and TGF-β1 in patient tissues.
  • MicroRNA expression signatures linked to TGF-β1 levels correlated with poorer patient survival.

Conclusions:

  • Disturbed microRNA expression is implicated in altered cellular adhesion in renal tumors.
  • TGF-β1 plays a crucial role in coordinating a microRNA network that regulates cellular adhesion processes in cancer.
  • This microRNA-TGF-β1 network represents a potential prognostic biomarker and therapeutic target in renal cancer.
Keywords:
AdhesionRenal cancerTGF-β1miR-25-3pmicroRNA

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