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The broader sense of nonsense

Evangelos D Karousis1, Oliver Mühlemann1

  • 1Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland.

Trends in Biochemical Sciences
|July 2, 2022
PubMed

Insights

Nonsense-mediated mRNA decay (NMD) degrades faulty and some normal mRNAs. Understanding NMD mechanisms and its role in diseases like cancer is crucial for developing new therapies.

Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • Nonsense-mediated mRNA decay (NMD) was first described as a surveillance pathway targeting mRNAs with premature termination codons (PTCs).
  • Emerging evidence shows NMD also regulates many normal mRNAs, impacting diverse biological processes.
  • The precise molecular mechanisms governing NMD substrate recognition and degradation efficiency remain incompletely understood.

Purpose of the Study:

  • To elucidate the key features of mammalian NMD.
  • To identify open questions regarding NMD regulation and function.
  • To review the implications of NMD in human diseases and therapeutic strategies.

Main Methods:

  • Literature review and synthesis of existing research on NMD.
  • Analysis of NMD's role in various biological contexts.
  • Examination of disease-associated NMD dysregulation.

Main Results:

  • NMD targets both aberrant and canonical mRNAs, with varying degradation efficiencies.
  • NMD plays significant roles in cancer, neurodegenerative disorders, and viral infections.
  • Dysregulation of NMD contributes to the pathogenesis of several diseases.

Conclusions:

  • NMD is a critical cellular process with broad biological implications beyond PTC surveillance.
  • Further research is needed to fully understand NMD mechanisms and its substrates.
  • Modulating NMD activity presents a promising therapeutic avenue for NMD-related diseases.
Keywords:
NMDgene expression regulationgenetic diseasesmRNA turnovernonsense mutationsnonsense-mediated mRNA decay

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