Evidence map›Paper›PMID 25414332›Full record

ArticleNucleic acids research2015

Multi-kilobase homozygous targeted gene replacement in human induced pluripotent stem cells.

Susan M Byrne, Luis Ortiz, Prashant Mali, John Aach, George M Church

Open access · goldAbstract read
In one paragraph

Article in Nucleic acids research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 87 papers.

0numbers the graph read from it
0cells of the map it votes in
87citing papers in PubMed
9.3field-weighted citation impact, top 1% 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

87 citing papers in PubMed, 170 citations in OpenAlex.

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  19. Inherent hepatocytic heterogeneity determines expression and retention of editedProceedings of the National Academy of Sciences of the United States of America · 2021
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27 more citing papers are in PubMed but not listed here.

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

5 authors at 1 institution in 1 country.

Susan M ByrneDepartment of Genetics, Harvard Medical School, Boston, MA 02115, USA sbyrne@genetics.med.harvard.edu.
Luis OrtizDepartment of Genetics, Harvard Medical School, Boston, MA 02115, USA.
Prashant MaliDepartment of Genetics, Harvard Medical School, Boston, MA 02115, USA.
John AachDepartment of Genetics, Harvard Medical School, Boston, MA 02115, USA.
George M ChurchDepartment of Genetics, Harvard Medical School, Boston, MA 02115, USA Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA gchurch@genetics.med.harvard.edu.
Harvard University · US

Funding

Causal Transcriptional Consequences of Human Genetic VariationP50HG005550 · NHGRI · HARVARD MEDICAL SCHOOL · PI CHURCH, GEORGE M · 2010 to 2014
$19.0M
Genome Engineering an IPSC Model of Alzheimer's DiseaseRF1AG048056 · NIA · HARVARD MEDICAL SCHOOL · PI CHURCH, GEORGE M, YANKNER, BRUCE A · 2014 to 2014
$2.1M
NHGRI NIH HHS 1P50 HG005550NIA NIH HHS RF1 AG048056
6 · The paper itself

Abstract

Sequence-specific nucleases such as TALEN and the CRISPR/Cas9 system have so far been used to disrupt, correct or insert transgenes at precise locations in mammalian genomes. We demonstrate efficient 'knock-in' targeted replacement of multi-kilobase genes in human induced pluripotent stem cells (iPSC). Using a model system replacing endogenous human genes with their mouse counterpart, we performed a comprehensive study of targeting vector design parameters for homologous recombination. A 2.7 kilobase (kb) homozygous gene replacement was achieved in up to 11% of iPSC without selection. The optimal homology arm length was around 2 kb, with homology length being especially critical on the arm not adjacent to the cut site. Homologous sequence inside the cut sites was detrimental to targeting efficiency, consistent with a synthesis-dependent strand annealing (SDSA) mechanism. Using two nuclease sites, we observed a high degree of gene excisions and inversions, which sometimes occurred more frequently than indel mutations. While homozygous deletions of 86 kb were achieved with up to 8% frequency, deletion frequencies were not solely a function of nuclease activity and deletion size. Our results analyzing the optimal parameters for targeting vector design will inform future gene targeting efforts involving multi-kilobase gene segments, particularly in human iPSC.

Indexed as

Gene DeletionHomozygoteBase SequenceCell SeparationClustered Regularly Interspaced Short Palindromic RepeatsDNA PrimersFlow CytometryHumansInduced Pluripotent Stem CellsPlasmidsPolymerase Chain ReactionSequence Analysis, DNADNA Primers

Identifiers

PMID25414332
PMCPMC4330342
OpenAlexW2126374378

What OpenQuestion holds

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LicenceCC BY-NC
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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.