Translational Control in Cancer

Nathaniel Robichaud1, Nahum Sonenberg1, Davide Ruggero2

  • 1Goodman Cancer Research Centre and Department of Biochemistry, McGill University, Montreal, Quebec H3A 1A3, Canada.

Insights

Cancer cells hijack messenger RNA (mRNA) translation to promote growth and spread. Understanding and targeting these translational control mechanisms offers new cancer therapy strategies.

Area of Science:

  • Molecular Biology
  • Oncology
  • Gene Expression Regulation

Background:

  • Protein synthesis via messenger RNA (mRNA) translation is crucial for gene expression regulation.
  • Aberrant mRNA translation plays a significant role in oncogenesis and cancer progression.
  • Numerous cancer-promoting factors, including cyclins and metabolic regulators, are translationally controlled.

Purpose of the Study:

  • To review the diverse mechanisms cancer cells employ to deregulate mRNA translation.
  • To elucidate the oncogenic impacts of reprogrammed translation in cancer.
  • To explore the therapeutic potential of targeting translational control in cancer treatment.

Main Methods:

  • Literature review of studies on mRNA translation in cancer.
  • Analysis of oncogenic factors regulated at the translational level.
  • Synthesis of information on therapeutic strategies targeting translation.

Main Results:

  • Cancer cells exhibit complex deregulation and reprogramming of mRNA translation.
  • Translationally controlled factors significantly contribute to cancer hallmarks like proliferation, survival, and metastasis.
  • Targeting specific translational pathways presents a promising avenue for novel cancer therapies.

Conclusions:

  • Translational control is a critical layer of gene regulation exploited by cancer cells.
  • Understanding the nuances of cancer-specific translation is essential for developing effective therapies.
  • Targeting mRNA translation offers a versatile strategy for combating various cancers.

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Translation01:31

Translation

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Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
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Initiation of Translation02:33

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Initiating translation is complex because it involves multiple molecules. Initiator tRNA, ribosomal subunits, and eukaryotic initiation factors (eIFs) are all required to assemble on the initiation codon of mRNA. This process consists of several steps that are mediated by different eIFs.
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The large ribosomal subunit has several important structures essential to translation. These include the peptidyl transferase center (PTC) - which is the site where the peptide bond is formed - and a large, internal, water-filled tube through which the nascent polypeptide moves. This latter structure is called the Peptide Exit Tunnel, and it begins at the PTC and spans the body of the large ribosomal subunit. During translation, as the nascent polypeptide chain is synthesized, it passes through...
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