DNA Rewriting
DNA rewriting refers to emerging gene-editing technologies that extend beyond the capabilities of CRISPR systems. While CRISPR enabled precise cuts to DNA sequences, successor technologies aim to expand the range of editable mutations, improve accuracy, and enhance efficiency. These advances represent the next generation of molecular tools for modifying genetic material in living organisms.
Base Editing and Prime Editing
Base editing and prime editing represent significant developments in DNA rewriting. Base editing converts one DNA base into another without creating double-strand breaks, allowing for direct chemical conversion of nucleotides. Prime editing uses a modified reverse transcriptase enzyme to write new genetic sequences, enabling insertions, deletions, and base conversions with greater flexibility than earlier approaches. Both techniques reduce off-target effects and expand the types of genetic changes that can be precisely made.
Research and Development
Dr. Feng Zhang at the Broad Institute has been instrumental in advancing DNA rewriting technologies. His laboratory has contributed to the development and refinement of base editing and prime editing systems, demonstrating their potential applications in correcting disease-causing mutations. Ongoing research focuses on improving efficiency, reducing off-target activity, and developing delivery methods suitable for therapeutic use in human patients.