Guarding the genome: strategies for off-target detection and minimization in CRISPR/Cas9 system

CRISPR-based genome editing has revolutionized molecular diagnostics and therapeutic applications, offering precise genetic modifications. However, off-target effects remain a significant challenge, potentially leading to unintended mutations and genomic instability. Addressing these concerns is crucial for ensuring the clinical safety and efficacy of CRISPR technologies.

This review provides a comprehensive analysis of strategies for detecting and mitigating off-target effects in CRISPR genome editing. We discuss in silico, in vitro, and in vivo detection methods, highlighting their strengths and limitations. Additionally, we examine advancements in guide RNA (gRNA) engineering, improved Cas variants, optimized delivery systems, base and prime editing technologies, and anti-CRISPR proteins as key approaches to enhance genome-editing precision.

While significant progress has been made in off-target detection and mitigation, challenges remain in accurately assessing unintended genomic modifications in vivo and ensuring long-term safety in clinical applications. Future research should focus on developing high-fidelity CRISPR variants, refining computational prediction models, and integrating multi-modal detection systems. Advancing delivery mechanisms and regulatory strategies will be essential for translating CRISPR into safe and effective therapeutic interventions.