CRISPR

Multiplexing gRNAs to Hedge Against Resistance to Gene Drive

Recently, Oberhofer et al (2018) published a paper examining the mechanisms of homing endonuclease gene drives in The Proceedings of the National Academy of Sciences. They used a novel nuclease-encoding cassette containing four multiplexed gRNAs targeting genes required for viability […]

Improved HDR-Mediated Genome Editing

Jose Arturo Gutierrez-Triana and colleagues from Heidelberg University report in eLIFE a CRISPR/Cas9 based methodology that simultaneously decreases donor DNA multimerization and increases HDR single-copy integration. A common obstacle that CRISPR/Cas HDR mediated genome editing faces is the accurate and […]

Cas9 Gene Drive, Sex-Conversion and Evolved Resistance

In a recent manuscript, KaramiNejadRanjbar et al. demonstrate the development of a proof of principle Cas9-based suppression gene drive in D. melanogaster that can be applied to pest insects, and discuss the implications of resistance allele formation for practical use […]

ReMOT control delivery technology holds promise for CRISPR-Cas9 activity independent of embryonic injection

A new report in Nature Communications by Chaverra-Rodriguez et al. details a novel Cas9-delivery approach for insect genetic modification. In their work, Chaverra-Rodriguez et al introduce a technology they term “ReMOT control”, or Receptor-Mediated Ovary Transduction of Cargo. In their […]