Evidence map›Paper›PMID 35276091›Full record

ArticleStem cell reports2022

Homozygous might be hemizygous: CRISPR/Cas9 editing in iPSCs results in detrimental on-target defects that escape standard quality controls.

Dina Simkin, Vasileios Papakis, Bernabe I Bustos, Christina M Ambrosi, Steven J Ryan, Valeriya Baru, Luis A Williams, Graham T Dempsey, Owen B McManus, John E Landers and 3 more

Open access · goldAbstract read
In one paragraph

Article in Stem cell reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed
5.0field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

41 citing papers in PubMed, 60 citations in OpenAlex.

  1. Functional analysis ofMolecular therapy. Nucleic acids · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors at 3 institutions in 1 country.

Dina SimkinThe Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
Vasileios PapakisThe Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
Bernabe I BustosThe Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Simpson Querrey Center of Neurogenetics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
Christina M AmbrosiQ-State Biosciences, Cambridge, MA 02139, USA.
Steven J RyanQ-State Biosciences, Cambridge, MA 02139, USA.
Valeriya BaruQ-State Biosciences, Cambridge, MA 02139, USA.
Luis A WilliamsQ-State Biosciences, Cambridge, MA 02139, USA.
Graham T DempseyQ-State Biosciences, Cambridge, MA 02139, USA.
Owen B McManusQ-State Biosciences, Cambridge, MA 02139, USA.
John E LandersDepartment of Neurology, University of Massachusetts Medical School, Worcester, MA 01605, USA.
Steven J LubbeThe Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Simpson Querrey Center of Neurogenetics, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
Alfred L GeorgeDepartment of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
Evangelos KiskinisThe Ken & Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Simpson Querrey Institute, Northwestern University, Chicago, IL 60611, USA; Department of Neuroscience, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA. Electronic address: evangelos.kiskinis@northwestern.edu.
Northwestern University · USQ-State Biosciences (United States) · USUniversity of Massachusetts Chan Medical School · US

Funding

Northwestern University Clinical and Translational Science Institute (NUCATS)UL1TR001422 · NCATS · NORTHWESTERN UNIVERSITY AT CHICAGO · PI D'AQUILA, RICHARD · 2015 to 2023
$56.8M
Project 3 - Development and investigation of murine models of channelopathy-associated epilepsyU54NS108874 · NINDS · NORTHWESTERN UNIVERSITY AT CHICAGO · PI KEARNEY, JENNIFER A · 2018 to 2022
$12.1M
Northwestern University Skin Disease Research Center Resource-based CenterP30AR075049 · NIAMS · NORTHWESTERN UNIVERSITY AT CHICAGO · PI Amy S Paller · 2019 to 2026
$6.6M
Identification of genes causative for familial ALS gene using exome sequencingR01NS073873 · NINDS · UNIV OF MASSACHUSETTS MED SCH WORCESTER · PI LANDERS, JOHN E · 2011 to 2019
$4.6M
Determining How Defective Nucleo-Cytoplasmic Trafficking Leads To Neurodegeneration In C9orf72-Related ALS And FTDR01NS104219 · NINDS · NORTHWESTERN UNIVERSITY AT CHICAGO · PI KISKINIS, EVANGELOS · 2018 to 2022
$2.3M
Identification and Characterization of ALS/FTD Associated Variants Using Whole Genome SequencingR56NS073873 · NINDS · UNIV OF MASSACHUSETTS MED SCH WORCESTER · PI LANDERS, JOHN E · 2020 to 2020
$586k
Investigating Divergent Disease Severity in Human Neuronal Models of KCNQ2-Related Developmental and Epilepsy DisordersR21NS125503 · NINDS · NORTHWESTERN UNIVERSITY AT CHICAGO · PI SIMKIN, DINA · 2022 to 2023
$440k
NCATS NIH HHS UL1 TR001422NIAMS NIH HHS P30 AR075049NINDS NIH HHS R01 NS073873NINDS NIH HHS R01 NS104219NINDS NIH HHS R21 NS125503NINDS NIH HHS R56 NS073873NINDS NIH HHS U54 NS108874
6 · The paper itself

Abstract

The ability to precisely edit the genome of human induced pluripotent stem cell (iPSC) lines using CRISPR/Cas9 has enabled the development of cellular models that can address genotype to phenotype relationships. While genome editing is becoming an essential tool in iPSC-based disease modeling studies, there is no established quality control workflow for edited cells. Moreover, large on-target deletions and insertions that occur through DNA repair mechanisms have recently been uncovered in CRISPR/Cas9-edited loci. Yet the frequency of these events in human iPSCs remains unclear, as they can be difficult to detect. We examined 27 iPSC clones generated after targeting 9 loci and found that 33% had acquired large, on-target genomic defects, including insertions and loss of heterozygosity. Critically, all defects had escaped standard PCR and Sanger sequencing analysis. We describe a cost-efficient quality control strategy that successfully identified all edited clones with detrimental on-target events and could facilitate the integrity of iPSC-based studies.

Indexed as

Induced Pluripotent Stem CellsCRISPR-Cas SystemsGene EditingHomozygoteHumansQuality ControlCRISPR/Cas9disease modelinggenome editingiPSCsisogenic control linesKCNQ2mtDNAon-target insertions/deletionsWGS

Identifiers

PMID35276091
PMCPMC9023783
OpenAlexW4220680064

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.