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Related Experiment Video

Updated: Sep 12, 2025

De novo Identification of Actively Translated Open Reading Frames with Ribosome Profiling Data
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Interpreting the Origins and Functions of Noncoding RNAs From the Ribosomal Genes.

Tom Moss1,2,3, Dany S Sibai1,2, Frédéric Lessard1

  • 1St-Patrick Research Group in Basic Oncology, Cancer Division of the Quebec University Hospital Research Centre, Laval University, Quebec, Canada.

Journal of Cellular Physiology
|August 6, 2025
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Summary
This summary is machine-generated.

Mammalian Ribosomal DNA (rDNA) intergenic spacers can generate noncoding RNAs (ncRNAs). These ncRNAs are linked to regulating rRNA synthesis, rDNA silencing, and tumor suppression.

Keywords:
RNAgene regulationnoncodingribosomal RNA genesribosomestumour suppression

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Mammalian Ribosomal DNA (rDNA) consists of tandem repeats encoding ribosomal RNAs (rRNAs).
  • The Intergenic Spacer (IGS) region, flanking rDNA repeats, was historically considered non-transcribed.
  • Recent findings indicate low-level transcription of the IGS, producing noncoding RNAs (ncRNAs).

Purpose of the Study:

  • To review the generation, regulation, and functions of IGS-derived ncRNAs.
  • To explore the role of these ncRNAs in cellular responses to stress and oncogenesis.
  • To investigate the link between IGS ncRNAs and tumor suppression.

Main Methods:

  • Literature review of existing data on rDNA transcription and ncRNA biology.
  • Analysis of mechanisms regulating IGS transcription and termination.
  • Correlation of ncRNA expression with cellular stress and tumor suppressor activity.

Main Results:

  • IGS regions are transcribed into various ncRNAs under specific cellular and environmental conditions.
  • These ncRNAs are implicated in regulating rRNA synthesis, rDNA silencing, and protein sequestration.
  • A significant portion of these ncRNAs may arise from failed transcription termination by the TTF1 factor.

Conclusions:

  • IGS-derived ncRNAs play crucial roles in cellular homeostasis and stress response.
  • The expression of these ncRNAs is potentially linked to tumor suppression mechanisms.
  • Further research is warranted to fully elucidate the functional significance of IGS ncRNAs.