Evidence map›Paper›PMID 34879271›Full record

ArticleCell reports2021

Anti-recombination function of MutSα restricts telomere extension by ALT-associated homology-directed repair.

Jonathan Barroso-González, Laura García-Expósito, Pablo Galaviz, Michelle Lee Lynskey, Joshua A M Allen, SongMy Hoang, Simon C Watkins, Hilda A Pickett, Roderick J O'Sullivan

Open access · goldAbstract read
In one paragraph

Article in Cell reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
2.2field-weighted citation impact, top 12% 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

22 citing papers in PubMed, 27 citations in OpenAlex.

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  11. Mismatch Repair Protein Msh6International journal of molecular sciences · 2023
    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

9 authors at 2 institutions in 2 countries.

Jonathan Barroso-GonzálezDepartment of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA.
Laura García-ExpósitoDepartment of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA.
Pablo GalavizBioinformatics Unit, Children's Medical Research Institute, Faculty of Medicine and Health, University of Sydney, Westmead, NSW 2145, Australia.
Michelle Lee LynskeyDepartment of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA.
Joshua A M AllenTelomere Length Regulation Unit, Children's Medical Research Institute, Faculty of Medicine and Health, University of Sydney, Westmead, NSW 2145, Australia.
SongMy HoangDepartment of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA.
Simon C WatkinsDepartment of Cell Biology, School of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA.
Hilda A PickettTelomere Length Regulation Unit, Children's Medical Research Institute, Faculty of Medicine and Health, University of Sydney, Westmead, NSW 2145, Australia.
Roderick J O'SullivanDepartment of Pharmacology and Chemical Biology, School of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA. Electronic address: osullivanr@upmc.edu.
University of Pittsburgh · USThe University of Sydney · AU

Funding

VECTOR CORE FACILITYP30CA047904 · NCI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI Jessie Nedrow · 1988 to 2026
$158.0M
Inhibition of the ALT pathway by interfering with Poly-ADP-Ribose metabolismR01CA207209 · NCI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI Roderick O'Sullivan · 2016 to 2026
$3.6M
The Prognostic Significance and Mechanistic Determination of Chromatin Remodeling Biomarkers in Non-Functional Pancreatic Neuroendocrine TumorR37CA263622 · NCI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI Aatur Dilip Singhi · 2021 to 2026
$3.4M
Request for a Nikon A1 confocal microscopeS10OD019973 · OD · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI WATKINS, SIMON C · 2015 to 2015
$358k
NCI NIH HHS P30 CA047904NCI NIH HHS R01 CA207209NCI NIH HHS R37 CA263622NIH HHS S10 OD019973
6 · The paper itself

Abstract

Alternative lengthening of telomeres (ALT) is a telomere-elongation mechanism observed in ∼15% of cancer subtypes. Current models indicate that ALT is mediated by homology-directed repair mechanisms. By disrupting MSH6 gene expression, we show that the deficiency of MutSα (MSH2/MSH6) DNA mismatch repair complex causes striking telomere hyperextension. Mechanistically, we show MutSα is specifically recruited to telomeres in ALT cells by associating with the proliferating-cell nuclear antigen (PCNA) subunit of the ALT telomere replisome. We also provide evidence that MutSα counteracts Bloom (BLM) helicase, which adopts a crucial role in stabilizing hyper-extended telomeres and maintaining the survival of MutSα-deficient ALT cancer cells. Lastly, we propose a model in which MutSα deficiency impairs heteroduplex rejection, leading to premature initiation of telomere DNA synthesis that coincides with an accumulation of telomere variant repeats (TVRs). These findings provide evidence that the MutSα DNA mismatch repair complex acts to restrain unwarranted ALT.

Indexed as

Telomere HomeostasisCell Line, TumorDNA-Binding ProteinsDNA Mismatch RepairDNA, NeoplasmGenomic InstabilityHeLa CellsHumansModels, GeneticMutS Homolog 2 ProteinNeoplasmsNucleic Acid ConformationNucleic Acid HeteroduplexesRecQ HelicasesTelomereBloom syndrome proteinDNA-Binding ProteinsDNA, NeoplasmG-T mismatch-binding proteinMSH2 protein, humanMutS Homolog 2 ProteinNucleic Acid HeteroduplexesRecQ HelicasesALTcancerhomology-directed repairmismatch repairmutationtelomere

Identifiers

PMID34879271
PMCPMC8724847
OpenAlexW4200190502

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.