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The p53/miR-34 axis in development and disease.

Matjaz Rokavec1, Huihui Li1, Longchang Jiang1

  • 1Experimental and Molecular Pathology, Institute of Pathology, Ludwig-Maximilians-Universität München, 80337 Munich, Germany.

Journal of Molecular Cell Biology
|May 13, 2014
PubMed
Summary

The tumor suppressor p53 regulates miR-34 microRNAs, which are crucial in cancer. Restoring miR-34 function inhibits cancer growth and metastasis, offering a potential therapeutic strategy.

Keywords:
cancermetastasismiR-34miR-34amiR-34b/cp53tumor suppression

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Area of Science:

  • Molecular Biology
  • Genetics
  • Oncology

Background:

  • The p53 tumor suppressor gene is frequently mutated in human cancers.
  • MicroRNAs (miRNAs) regulate gene expression post-transcriptionally.
  • p53 signaling involves the regulation of several miRNAs, notably the miR-34 family.

Purpose of the Study:

  • To investigate the role of miR-34 family members as tumor suppressors.
  • To explore the therapeutic potential of miR-34 re-expression in cancer treatment.

Main Methods:

  • Analysis of p53-induced miRNAs.
  • Assessment of miR-34 family member expression in various tumors.
  • Experimental evaluation of ectopic miR-34 expression in cancer cell lines and mouse models.

Main Results:

  • miR-34 family members are the most prevalent p53-induced miRNAs.
  • miR-34s are frequently silenced in tumors, indicating tumor suppressor activity.
  • Ectopic miR-34 expression inhibits cancer cell proliferation, migration, invasion, and metastasis.
  • miR-34 re-expression represses tumor growth and metastasis in preclinical models.

Conclusions:

  • miR-34 microRNAs are critical tumor suppressors regulated by p53.
  • Restoring miR-34 function is a promising therapeutic strategy for various cancers.
  • miR-34 also plays significant roles in non-cancerous conditions like aging and cardiovascular diseases.