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CRISPR/Cas9 Ribonucleoprotein-mediated Precise Gene Editing by Tube Electroporation
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Simultaneous precise editing of multiple genes in human cells.

Stephan Riesenberg1, Manjusha Chintalapati1, Dominik Macak1

  • 1Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology.

Nucleic Acids Research
|August 9, 2019
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Summary
This summary is machine-generated.

Researchers enhanced precise genome editing by inhibiting DNA-PKcs, a key DNA repair enzyme. This breakthrough enables simultaneous editing of multiple genes, overcoming previous limitations in CRISPR technology.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biotechnology

Background:

  • CRISPR genome editing relies on DNA repair pathways: NHEJ (error-prone) and HDR (precise).
  • NHEJ's high efficiency limits precise editing and multiplexing capabilities.
  • Targeting DNA repair is crucial for improving genome engineering outcomes.

Purpose of the Study:

  • To enhance the efficiency of homology-directed repair (HDR) for precise genome editing.
  • To enable simultaneous precise editing of multiple genes within the same cell.
  • To investigate the role of DNA-PKcs in modulating CRISPR-mediated editing outcomes.

Main Methods:

  • Introduction of a mutation in the human PRKDC gene to eliminate DNA-PKcs kinase activity.
  • Utilizing CRISPR-Cas9 technology with a donor oligonucleotide for precise editing.
  • Employing the kinase inhibitor M3814 for transient inhibition of DNA-PKcs.
  • Assessing editing efficiency across different cell types and CRISPR enzymes.

Main Results:

  • Eliminating DNA-PKcs activity significantly increased HDR efficiency, achieving up to 87% precise editing on chromosomes.
  • Enabled simultaneous precise editing of up to four genes (eight chromosomes) in a single cell.
  • Transient inhibition of DNA-PKcs using M3814 also enhanced precise genome editing.

Conclusions:

  • Inhibition of DNA-PKcs is a viable strategy to boost HDR and achieve highly efficient, multiplexed genome editing.
  • This approach overcomes previous limitations, paving the way for complex genetic modifications.
  • The findings have significant implications for therapeutic gene editing and biological research.