AI Insight
This study directly compares two widely-used gene manipulation techniques, CRISPR knockout and CRISPR interference, using Perturb-seq to measure their effects on gene expression in individual cells. Both methods produced consistent, reproducible transcriptional changes when targeting the same genes, confirming their reliability. However, each approach has distinct tradeoffs: CRISPRi showed higher rates of off-target effects, while CRISPRko induced cellular stress responses due to DNA double-strand breaks.
Why it matters
This benchmarking study provides critical guidance for researchers designing large-scale genetic screens, helping them choose between these two major CRISPR approaches based on their specific experimental needs. The findings highlight important artifacts and limitations of each method that could affect data interpretation in functional genomics studies.
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⚠️ Preprint – Noch nicht peer-reviewed
Dieser Artikel wurde noch nicht von unabhängigen Experten begutachtet. Die Ergebnisse sind vorläufig und sollten mit Vorsicht interpretiert werden.
CRISPR knockout (CRISPRko) and CRISPR interference (CRISPRi) are two workhorse technologies for loss-of-function studies, yet direct comparisons between the two are scant relative to their widespread adoption. Here, we establish benchmarking libraries for Cas9-based CRISPRko and CRISPRi screens using Perturb-seq as the read-out. For both modalities, we observe consistent transcriptional signatures among cells with the same genes perturbed, strong evidence of on-target signal. We also examine tradeoffs between modalities: while CRISPRi guides demonstrate heightened rates of off-target activity, we also observe artifacts stemming from the cellular response to double-stranded breaks with the use of CRISPRko. The libraries and analyses presented here will be a useful benchmarking and de-risking resource for any group preparing for a large-scale Perturb-seq screen.
Source: Direct comparison of CRISPR knockout and interference with Perturb-seq