Evidence map›Paper›PMID 22871734›Full record

ArticleCell cycle (Georgetown, Tex.)2012

Werner syndrome protein suppresses the formation of large deletions during the replication of human telomeric sequences.

Rama Rao Damerla, Kelly E Knickelbein, Steven Strutt, Fu-Jun Liu, Hong Wang, Patricia L Opresko

Open access · bronzeAbstract read
In one paragraph

Article in Cell cycle (Georgetown, Tex.), 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
3.0field-weighted citation impact, top 8% 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

35 citing papers in PubMed, 53 citations in OpenAlex.

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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

6 authors at 2 institutions in 1 country.

Rama Rao DamerlaDepartment of Environmental and Occupational Health, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA.
Kelly E Knickelbein
Steven Strutt
Fu-Jun Liu
Hong Wang
Patricia L Opresko
University of Pittsburgh · USUPMC Hillman Cancer Center · US

Funding

Mechanisms of Telomeric DNA Loss and RepairR01ES015052 · NIEHS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI OPRESKO, PATRICIA L · 2006 to 2010
$2.4M
DNA damage induced structural and dynamic changes at telomeresR00ES016758 · NIEHS · NORTH CAROLINA STATE UNIVERSITY RALEIGH · PI WANG, HONG · 2012 to 2014
$733k
DNA damage induced structural and dynamic changes at telomeresK99ES016758 · NIEHS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI WANG, HONG · 2009 to 2010
$165k
NIEHS NIH HHS 1K99ES016758-01NIEHS NIH HHS ES0515052NIEHS NIH HHS K99 ES016758NIEHS NIH HHS R00 ES016758NIEHS NIH HHS R01 ES015052
6 · The paper itself

Abstract

Werner syndrome (WS) is a disorder characterized by features of premature aging and increased cancer that is caused by loss of the RecQ helicase WRN. Telomeres consisting of duplex TTAGGG repeats in humans protect chromosome ends and sustain cellular proliferation. WRN prevents the loss of telomeres replicated from the G-rich strand, which can form secondary G-quadruplex (G4) structures. Here, we dissected WRN roles in the replication of telomeric sequences by examining factors inherent to telomeric repeats, such as G4 DNA, independently from other factors at chromosome ends that can also impede replication. For this we used the supF shuttle vector (SV) mutagenesis assay. We demonstrate that SVs with [TTAGGG]6 sequences are stably replicated in human cells, and that the repeats suppress the frequency of large deletions despite G4 folding potential. WRN depletion increased the supF mutant frequency for both the telomeric and non-telomeric SVs, compared with the control cells, but this increase was much greater (27-fold) for telomeric SVs. The higher SV mutant frequencies in WRN-deficient cells were primarily due to an increase in large sequence deletions and rearrangements. However, WRN depletion caused a more dramatic increase in deletions and rearrangements arising within the telomeric SV (70-fold), compared with non-telomeric SV (8-fold). Our results indicate that WRN prevents large deletions and rearrangements during replication, and that this role is particularly important in templates with telomeric sequence. This provides a possible explanation for increased telomere loss in WS cells.

Indexed as

DNA ReplicationSequence DeletionBase SequenceCell Line, TumorExodeoxyribonucleasesGene RearrangementGenes, ReporterGenes, SuppressorGenetic VectorsG-QuadruplexesHumansMolecular Sequence DataMutagenesisRecQ HelicasesRepetitive Sequences, Nucleic AcidRNA, TransferExodeoxyribonucleasesRecQ HelicasesRNA, TransfersupF tRNAWerner Syndrome HelicaseWRN protein, human

Identifiers

PMID22871734
PMCPMC3442914
OpenAlexW2151888603

What OpenQuestion holds

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Read underepoch 390

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.