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MiR-30d induces apoptosis and is regulated by the Akt/FOXO pathway in renal cell carcinoma

Chenglin Wu1, Bo Jin, Liting Chen

  • 1Department of Biochemistry and Molecular Biology, Health Science Center, Peking University, 38 Xueyuan Road, 100191 Beijing, China.

Cellular Signalling
|February 19, 2013
PubMed

Insights

MicroRNAs (miRNAs) are crucial in cancer. This study reveals miR-30d acts as a tumor suppressor in renal cell carcinoma by inhibiting the MTDH oncoprotein via the Akt/FOXO pathway.

Area of Science:

  • Molecular Biology
  • Oncology
  • Cell Signaling

Background:

  • MicroRNAs (miRNAs) regulate gene expression and are implicated in tumorigenesis.
  • The precise role of miRNAs in cell signaling pathways, particularly in renal cell carcinoma (RCC), remains incompletely understood.

Purpose of the Study:

  • To elucidate the role of miR-30d in the phosphoinositide 3-kinase (PI3K)/Akt signaling pathway within RCC.
  • To identify downstream targets and regulatory mechanisms of miR-30d in RCC.

Main Methods:

  • Investigated miR-30d expression in RCC cells.
  • Utilized Akt inhibition and transcription factor analysis (FOXO 3A).
  • Performed functional assays for cell proliferation and apoptosis; identified MTDH as a miR-30d target.

Main Results:

  • miR-30d is transcriptionally upregulated by Akt inhibition via FOXO 3A activation.
  • miR-30d overexpression suppresses RCC cell proliferation and induces apoptosis, indicating tumor suppressor activity.
  • miR-30d post-transcriptionally downregulates metadherin (MTDH) by mRNA destabilization.

Conclusions:

  • A novel signaling pathway (Akt/FOXO/miR-30d/MTDH) in RCC is identified.
  • miR-30d functions as a tumor suppressor in renal cell carcinoma.
  • miR-30d represents a potential therapeutic target for RCC treatment.

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