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Breast Cancer Metastatic Progression Requires mRNA Posttranscriptional Suppression

Cinthia Claudia Amaya Ramirez1, Fabricio Loayza-Puch1

  • 1Translational Control and Metabolism, German Cancer Research Center (DKFZ), Heidelberg, Germany.

Cancer Research
|July 20, 2023
PubMed

Insights

Downregulation of heterogeneous nuclear ribonucleoprotein C (HNRNPC) in metastatic cancer cells lengthens mRNA 3' untranslated regions. This leads to translational repression, impacting cancer progression.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Oncology

Background:

  • Cancer cell survival relies on metabolic reprogramming, influencing growth, migration, and colonization.
  • Translational control is crucial in oncogenesis, but its role in cancer progression is not fully understood.

Purpose of the Study:

  • To investigate the role of the RNA-binding protein heterogeneous nuclear ribonucleoprotein C (HNRNPC) in cancer progression.
  • To elucidate the mechanisms by which HNRNPC influences mRNA translation and metastatic potential.

Main Methods:

  • The study analyzed the function of HNRNPC as a translational regulator.
  • Investigated the impact of HNRNPC downregulation on mRNA 3' untranslated regions (UTRs) in highly metastatic cells.

Main Results:

  • HNRNPC downregulation in highly metastatic cells results in the lengthening of 3' UTRs in HNRNPC-bound mRNAs.
  • This lengthening leads to translational repression mediated by the AGO-miRNA RNA-induced silencing complex.

Conclusions:

  • HNRNPC acts as a translational regulator impacting cancer progression.
  • The mechanism involves altered mRNA 3' UTRs and miRNA-mediated translational repression, highlighting a novel pathway in metastasis.

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