PE5max, Minimal Off-Target Effects in Prime Editing
Prime editing, a technique that modifies DNA without causing double-strand breaks, has historically raised safety concerns due to potential off-target effects. Recent research compared four PE variants under identical conditions, revealing that PE5max exhibited minimal sgRNA-induced mutations and negligible large deletions or chromosomal rearrangements, confirmed even by ultra-sensitive GOTI analysis. This suggests PE5max as a safer option for therapeutic applications.
Prime editing (PE) represents a precise genome-editing approach that avoids double-strand breaks, promising significant advancements in clinical and agricultural sectors. Despite its potential, concerns persist regarding its genome-wide off-target effects. This study systematically evaluated four PE variants (PE2max, PE3max, PE4max, and PE5max) through PEM-seq and RNA-seq analyses, supplemented by ultra-sensitive GOTI testing for PE5max. Findings indicate that PE5max showed no detectable sgRNA-driven off-target single-nucleotide variants (SNVs) in GOTI assays and exhibited only minor large deletions and chromosomal translocations. This comparative analysis under controlled conditions highlights PE5max's superior specificity, supporting its enhanced safety for therapeutic use.
Enhanced safety profiles accelerate clinical gene editing applications