1. Scarless Genome Editing of Human Pluripotent Stem Cells via Transient Puromycin Selection.
- Author
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Steyer B, Bu Q, Cory E, Jiang K, Duong S, Sinha D, Steltzer S, Gamm D, Chang Q, and Saha K
- Subjects
- Acetyltransferases chemistry, CRISPR-Cas Systems genetics, DNA, Single-Stranded genetics, Gene Expression Regulation genetics, Genetic Vectors genetics, Genome, Human genetics, Humans, Acetyltransferases genetics, Cell Differentiation genetics, Gene Editing methods, Induced Pluripotent Stem Cells
- Abstract
Genome-edited human pluripotent stem cells (hPSCs) have broad applications in disease modeling, drug discovery, and regenerative medicine. We present and characterize a robust method for rapid, scarless introduction or correction of disease-associated variants in hPSCs using CRISPR/Cas9. Utilizing non-integrated plasmid vectors that express a puromycin N-acetyl-transferase (PAC) gene, whose expression and translation is linked to that of Cas9, we transiently select for cells based on their early levels of Cas9 protein. Under optimized conditions, co-delivery with single-stranded donor DNA enabled isolation of clonal cell populations containing both heterozygous and homozygous precise genome edits in as little as 2 weeks without requiring cell sorting or high-throughput sequencing. Edited cells isolated using this method did not contain any detectable off-target mutations and displayed expected functional phenotypes after directed differentiation. We apply the approach to a variety of genomic loci in five hPSC lines cultured using both feeder and feeder-free conditions., (Copyright © 2017 The Author(s). Published by Elsevier Inc. All rights reserved.)
- Published
- 2018
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