Ribosome biogenesis includes the making and processing of ribosomal RNAs, the biosynthesis of ribosomal proteins from their mRNAs in the cytosol and their transport to the nucleolus to assemble pre-ribosomal particles. Several stresses including cellular senescence reduce nucleolar rRNA synthesis and maturation increasing the availability of ribosome-free ribosomal proteins. Several ribosomal proteins can activate the p53 tumor suppressor pathway but cells without p53 can still arrest their proliferation in response to an imbalance between ribosomal proteins and mature rRNA production. Recent results on senescence-associated ribogenesis defects (SARD) show that the ribosomal protein S14 (RPS14 or uS11) can act as a CDK4/6 inhibitor linking ribosome biogenesis defects to the main engine of cell cycle progression. This work offers new insights into the regulation of the cell cycle and suggests novel avenues to design anticancer drugs.
Ribosomal Proteins Control Tumor Suppressor Pathways in Response to Nucleolar Stress
Frédéric Lessard,L. Brakier-Gingras,G. Ferbeyre
Published 2019 in Bioessays
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- Publication year
2019
- Venue
Bioessays
- Publication date
2019-02-01
- Fields of study
Biology, Medicine
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- Source metadata
Semantic Scholar, PubMed
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