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Updated: Sep 25, 2025

Enhanced Genome Editing with Cas9 Ribonucleoprotein in Diverse Cells and Organisms
Published on: May 25, 2018
Chimeric oligonucleotides combining guide RNA and single-stranded DNA repair template effectively induce precision
Avantika Ghosh1, Ksenia Myacheva1,2, Marisa Riester1
1Division of Cancer Research, Department of Thoracic Surgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, German Cancer Consortium (DKTK) - Partner Site Freiburg, Freiburg, Germany.
Chemically synthesized chimeric oligonucleotides enable precise genome editing via CRISPR-Cas9 technology. These RNA-DNA molecules, when fused correctly, facilitate targeted gene modifications for molecular biology and medicine.
Area of Science:
- Molecular Biology
- Biotechnology
- Genomics
Background:
- CRISPR technology has revolutionized genome engineering.
- Precision genome editing is crucial for molecular biology, medicine, and biotechnology.
Purpose of the Study:
- To explore chemically synthesized chimeric oligonucleotides for precision genome editing.
- To assess the functionality of fused crRNA and DNA repair templates in RNP complexes.
Main Methods:
- Utilized chemically synthesized chimeric oligonucleotides (crRNA fused to ssDNA repair template).
- Formed Ribonucleoprotein (RNP) complexes with Cas9.
- Generated specific mutations including oncogenic driver mutations and single nucleotide changes.
Main Results:
- Chimeric oligonucleotides successfully formed RNPs and directed Cas9 for genome editing.
- The 3'-end polarity of the DNA repair template fused to crRNA is essential for editing.
- Editing efficiency was comparable to or less than standard bipartite RNPs.
Conclusions:
- Chimeric RNPs are a viable approach for one-molecule precision genome editing.
- The polarity of chimeric oligos is critical for successful and accurate gene editing.
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