Large DNA fragment knock-in and sequential gene editing in Plasmodium falciparum: a preliminary study using suicide-rescue-based CRISPR/Cas9 system

Mol Cell Biochem. 2023 Apr 1:1-9. doi: 10.1007/s11010-023-04711-5. Online ahead of print.ABSTRACTCRISPR/Cas9 technology applied to Plasmodium falciparum offers the potential to greatly improve gene editing, but such expectations including large DNA fragment knock-ins and sequential gene editing have remained unfulfilled. Here, we achieved a major advance in addressing this challenge, especially for creating large DNA fragment knock-ins and sequential editing, by modifying our suicide-rescue-based system that has already been demonstrated to be highly efficient for conventional gene editing. This improved approach was confirmed to mediate efficient knock-ins of DNA fragments up to 6.3 kb, to produce "marker-free" genetically engineered parasites and to show potential for sequential gene editing. This represents an important advancement in establishing platforms for large-scale genome editing, which might gain a better understanding of gene function for the most lethal cause of malaria and contribute to adjusting synthetic biology strategies to live parasite malaria vaccine development. Site-directed knock-in of large DNA fragments is highly efficient using suicide-rescue-based CRISPR/Cas9 system, and sequential gene insertion is feasible but further confirmation is still needed.PMID:37004637 | PMC:PMC10066980 | DOI:10.1007/s11010-023-04711-5
Source: Molecular and Cellular Biochemistry - Category: Biochemistry Authors: Source Type: research