Cited by 5,234CRISPR and Genetic EngineeringChromatin Remodeling and CancerRNA Interference and Gene Delivery

Genome-scale CRISPR-Cas9 knockout screening in human cells

Open access
Shalem, Ophir, Sanjana, Neville E., Hartenian, Ella, Shi, Xi, Scott, David A., Mikkelsen, Tarjei S., Heckl, Dirk, Ebert, Benjamin L. +3 more·2014·Science

Abstract

Improving Whole-Genome Screens: Improved methods are needed for the knockout of individual genes in genome-scale functional screens. Wang et al. (p. 80 , published online 12 December) and Shalem et al. (p. 84 , published online 12 December) used the bacterial CRISPR/Cas9 system to power-screen protocols that avoid several of the pitfalls associated with small interfering RNA (siRNA) screens. Genome editing by these methods completely disrupts target genes, thus avoiding weak signals that can occur when transcript abundance is partially decreased by siRNA. Furthermore, gene targeting by the CRISPR system is more precise and appears to produce substantially fewer off-target effects than existing methods.

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Crossref · 10.1126/science.1247005

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  • gRNA-Cas9 nuclease-induced DSBs repaired by NHEJ resulted in 1-10 bp deletions or 1 bp insertions in as many as 90% of cells.

    “The gRNA–Cas9 nuclease complex directed double-stranded breaks (DSBs) at target sites, which after repair by error-prone non-homologous end-joining (NHEJ)196,197, resulted in 1–10 bp deletions or 1 bp insertions (‘indels’) in as many as 90% of cells192,194 (Figure 2a).”

    From Towards a comprehensive catalogue of validated and target-linked human enhancers (2020) · cites this paper as [192]

    The paper’s Abstract (page not provided) says sgRNA-guided Cas9 creates targeted double-strand breaks and indels. In its EGFP experiment, 93 ± 8% of cells lost fluorescence, while sequencing found a 92 ± 9% indel frequency in reads. Our copy does not specify 1–10 bp deletions or 1 bp insertions, or show that those particular indels occurred in 90% of cells. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Pooled CRISPR screening is a powerful and widely used method for identifying genes involved in biological mechanisms such as cell proliferation, drug resistance, and viral infection.

    “Pooled CRISPR screening is a powerful and widely used method for identifying genes involved in biological mechanisms such as cell proliferation 1, 2 , drug resistance 3 , and viral infection 4 .”
  • Many identified mediator complex components were concordantly associated with resistance to other targeted cancer therapies, but were also controversially identified as essential genes in CML cells.

    “Many of the identified mediator complex components were concordantly associated with resistance to other targeted cancer therapies,44,45 but were also controversially identified as essential genes in CML cells.46”

    From Integrated drug profiling and CRISPR screening identify BCR::ABL1-independent vulnerabilities in chronic myeloid leukemia (2024) · cites this paper as [44]

    Citation 46 attaches to the claim that Mediator components were identified as essential genes in CML cells. The negative-selection screen passage (section labeled Abstract; page unavailable) reports essential genes in melanoma A375 and stem-cell HUES62 lines, but does not identify Mediator components as essential or examine CML cells. Searches for CML, chronic myeloid leukemia, and essential Mediator components found no supporting passage. (LLM, conf=0.76)

    Experimental — accuracy not yet measured
  • Historically pooled screens rely on enriching populations for a phenotype followed by NGS to measure perturbation abundance.

    “Historically, pooled screens have relied on enriching populations of cells for a phenotype of interest, followed by next-generation sequencing (NGS) to measure changes in perturbation abundance.”

    From Optical Pooled Screens in Human Cells (2019) · cites this paper as Shalem et al., 2014

  • Pooling gene perturbations increases scalability but cannot be combined with imaging of complex or dynamic cellular phenotypes.

    “Pooling gene perturbations greatly improves scalability, but is not compatible with imaging of complex and dynamic cellular phenotypes.”

    From Optical Pooled Screens in Human Cells (2019) · cites this paper as Shalem et al., 2014

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Authors
Shalem, O., Sanjana, N. E., Hartenian, E., Shi, X., Scott, D. A., Mikkelsen, T. S., Heckl, D., Ebert, B. L., Root, D. E., Doench, J. G., & Zhang, F.
Affiliations
  • Broad Institute (US)
  • Brigham and Women's Hospital (US)
Corresponding author
Zhang, Feng
Venue
Science
Published
2014-01-03
Volume
343
Issue
6166
Pages
84-87
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W1973260880
Cited by
5,234
References
27
Citations by year
2026: 258 · 2025: 371 · 2024: 461 · 2023: 435 · 2022: 446 · 2021: 504 · 2020: 529 · 2019: 496 · 2018: 446 · 2017: 438 · 2016: 379 · 2015: 262 · 2014: 196 · 2013: 5 · 2012: 1
FWCI
125.81
Type
journal article
Language
en
Open access
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion, cc-by-nc-sa)
Funders
  • National Science Foundation
  • Damon Runyon Cancer Research Foundation
  • McKnight Foundation
  • National Institutes of Health (R01‐grant)
  • National Institute of Mental Health (DP1MH100706)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK097768, 1R01-DK097768)
  • National Center for Chronic Disease Prevention and Health Promotion (1DP1-MH100706)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
Keywords
CRISPR/Cas9, lentiviral gene delivery, essential genes, cancer cells, pluripotent stem cells, melanoma, vemurafenib resistance, RAF inhibitor resistance, neurofibromatosis type 1, MED12, neurofibromatosis type 2, CUL3
MeSH terms
Vemurafenib, Cell Survival, Genetic Testing, Humans, Indoles, Melanoma, Selection, Genetic, Sulfonamides, Transcription Factors, Gene Library, Lentivirus, Genes, Neurofibromatosis 1, Genes, Neurofibromatosis 2, Drug Resistance, Neoplasm, Pluripotent Stem Cells, Cullin Proteins, Protein Kinase Inhibitors, raf Kinases, Adaptor Proteins, Signal Transducing, Genome-Wide Association Study, Gene Knockout Techniques, Genetic Loci, Mediator Complex, Clustered Regularly Interspaced Short Palindromic Repeats

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