Evidence map›Paper›PMID 30386178›Full record

ArticleCancer cell international2018

Genome editing of oncogenes with ZFNs and TALENs: caveats in nuclease design.

Sumitra Shankar, Ahalya Sreekumar, Deepti Prasad, Ani V Das, M Radhakrishna Pillai

Open access · goldAbstract read
In one paragraph

Article in Cancer cell international, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
0.9field-weighted citation impact, top 25% 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

16 citing papers in PubMed, 32 citations in OpenAlex.

  1. Review
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  6. Reporter Alleles in hiPSCs: Visual Cues on Development and Disease.International journal of molecular sciences · 2024
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  14. Loci specific epigenetic drug sensitivity.Nucleic acids research · 2020
    Article
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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

5 authors at 1 institution in 1 country.

Sumitra ShankarRajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, India.
Ahalya SreekumarRajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, India.
Deepti PrasadRajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, India.
Ani V DasRajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, India.
M Radhakrishna PillaiRajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, India.ORCID 0000-0002-2085-9723
Rajiv Gandhi Centre for Biotechnology · IN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGene knockout technologies involving programmable nucleases have been used to create knockouts in several applications. Gene editing using Zinc-finger nucleases (ZFNs), Transcription activator like effectors (TALEs) and CRISPR/Cas systems has been used to create changes in the genome in order to make it non-functional. In the present study, we have looked into the possibility of using six fingered CompoZr ZFN pair to target the E6 gene of HPV 16 genome.

methodsHPV 16

resultsAlthough ZFN editing activity in yeast based MEL-I assay was high, it yielded very low activity in tumor cell lines; only 6% editing in CaSki and negligible activity in SiHa cell lines. Though editing efficiency was better in CaSki, no significant reduction in E6 protein levels was observed in immunocytochemical analysis. Further, in silico analysis of DNA binding prediction revealed that some of the ZFN modules bound to sequence that did not match the target sequence. Hence, alternate ZFN pairs for E6 and E7 were not synthesized since no further active sites could be identified by in silico analyses. Then we designed TALENs to target E6 and E7 gene. TALENs designed to target E7 gene led to reduction of E7 levels in CaSki and SiHa cervical cancer cell lines. However, TALEN designed to target E6 gene did not yield any editing activity.

conclusionsOur study highlights that designed nucleases intended to obtain bulk effect should have a reasonable editing activity which reflects phenotypically as well. Nucleases with low editing efficiency, intended for generation of knockout cell lines nucleases could be obtained by single cell cloning. This could serve as a criterion for designing ZFNs and TALENs.

Indexed as

Cervical cancerGene editingHPVTALENZinc-finger nucleases

Identifiers

PMID30386178
PMCPMC6198504
OpenAlexW2897418306

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.