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Updated: Dec 10, 2025

Selection-dependent and Independent Generation of CRISPR/Cas9-mediated Gene Knockouts in Mammalian Cells
Published on: June 16, 2017
CRISPR Start-Loss: A Novel and Practical Alternative for Gene Silencing through Base-Editing-Induced Start Codon
Siyu Chen1, Wanhua Xie2, Zhiquan Liu1
1Key Laboratory of Zoonosis Research, Ministry of Education, College of Animal Science, Jilin University, Changchun 130062, China.
Abstract:
CRISPR-Cas9-mediated gene knockout and base-editing-associated induction of STOP codons (iSTOP) have been widely used to exterminate the function of a coding gene, while they have been reported to exhibit side effects. In this study, we propose a novel and practical alternative method referred to as CRISPR Start-Loss (CRISPR-SL), which eliminates gene expression by utilizing both adenine base editors (ABEs) and cytidine base editors (CBEs) to disrupt the initiation codon (ATG). CRISPR-SL has been verified to be a feasible strategy on the cellular and embryonic levels (mean editing efficiencies up to 30.67% and 73.50%, respectively) and in two rabbit models mimicking Otc deficiency (Otc gene) and long hair economic traits (Fgf5 gene).
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