| Autor: |
Samuele Cancellieri, Jing Zeng, Linda Yingqi Lin, Manuel Tognon, My Anh Nguyen, Jiecong Lin, Nicola Bombieri, Stacy A. Maitland, Marioara-Felicia Ciuculescu, Varun Katta, Shengdar Q. Tsai, Myriam Armant, Scot A. Wolfe, Rosalba Giugno, Daniel E. Bauer, Luca Pinello |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Nat Genet |
| Popis: |
CRISPR gene editing holds great promise to modify DNA sequences in somatic cells to treat disease. However, standard computational and biochemical methods to predict off-target potential focus on reference genomes. We developed an efficient tool called CRISPRme that considers SNP and indel genetic variants to nominate and prioritize off-target sites. We tested the software with a BCL11A enhancer targeting guide RNA showing promise in clinical trials for sickle cell disease and β-thalassemia and found that the top candidate off-target is produced by an allele common in African-ancestry populations (MAF 4.5%) that introduces a protospacer adjacent motif (PAM) sequence. We validated that SpCas9 generates strictly allele-specific indels and pericentric inversions in CD34+ HSPCs, although high-fidelity Cas9 mitigates this off-target. This report illustrates how genetic variants should be considered as modifiers of gene editing outcomes. We expect that variant-aware off-target assessment will become integral to therapeutic genome editing evaluation and provide a powerful approach for comprehensive off-target nomination. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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