Evidence map›Paper›PMID 30032296›Full record

ArticleNucleic acids research2018

Loss of E2F7 confers resistance to poly-ADP-ribose polymerase (PARP) inhibitors in BRCA2-deficient cells.

Kristen E Clements, Tanay Thakar, Claudia M Nicolae, Xinwen Liang, Hong-Gang Wang, George-Lucian Moldovan

Open access · goldAbstract read
In one paragraph

Article in Nucleic acids research, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed, 1 pooled it
3.0field-weighted citation impact, top 6% 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

49 citing papers in PubMed, 1 synthesis or guideline pooled it, 70 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 1 institution in 1 country.

Kristen E ClementsDepartment of Biochemistry and Molecular Biology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
Tanay ThakarDepartment of Biochemistry and Molecular Biology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
Claudia M NicolaeDepartment of Biochemistry and Molecular Biology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
Xinwen LiangDepartment of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
Hong-Gang WangDepartment of Pediatrics, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
George-Lucian MoldovanDepartment of Biochemistry and Molecular Biology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.
Pennsylvania State University · US

Funding

The Role of Mono-ADP-Ribosylation by PARP14 in RadioresistanceR01ES026184 · NIEHS · PENNSYLVANIA STATE UNIV HERSHEY MED CTR · PI George Lucian Moldovan · 2016 to 2026
$3.6M
NIEHS NIH HHS R01 ES026184
6 · The paper itself

Abstract

BRCA proteins are essential for homologous recombination (HR) DNA repair, and their germline or somatic inactivation is frequently observed in human tumors. Understanding the molecular mechanisms underlying the response of BRCA-deficient tumors to chemotherapy is paramount for developing improved personalized cancer therapies. While PARP inhibitors have been recently approved for treatment of BRCA-mutant breast and ovarian cancers, not all patients respond to this therapy, and resistance to these novel drugs remains a major clinical problem. Several mechanisms of chemoresistance in BRCA2-deficient cells have been identified. Rather than restoring normal recombination, these mechanisms result in stabilization of stalled replication forks, which can be subjected to degradation in BRCA2-mutated cells. Here, we show that the transcriptional repressor E2F7 modulates the chemosensitivity of BRCA2-deficient cells. We found that BRCA2-deficient cells are less sensitive to PARP inhibitor and cisplatin treatment after E2F7 depletion. Moreover, we show that the mechanism underlying this activity involves increased expression of RAD51, a target for E2F7-mediated transcriptional repression, which enhances both HR DNA repair, and replication fork stability in BRCA2-deficient cells. Our work describes a new mechanism of therapy resistance in BRCA2-deficient cells, and identifies E2F7 as a putative biomarker for tumor response to PARP inhibitor therapy.

Indexed as

Antineoplastic AgentsBRCA2 ProteinCell Line, TumorCRISPR-Cas SystemsDNA, NeoplasmDNA ReplicationDrug Resistance, NeoplasmE2F7 Transcription FactorEnzyme InhibitorsGene Knockout TechniquesGenes, BRCA2HumansNeoplasm ProteinsPhthalazinesPiperazinesPoly(ADP-ribose) PolymerasesAntineoplastic AgentsBRCA2 ProteinBRCA2 protein, humanDNA, NeoplasmE2F7 protein, humanE2F7 Transcription FactorEnzyme InhibitorsNeoplasm ProteinsolaparibPhthalazinesPiperazinesPoly(ADP-ribose) PolymerasesRAD51 protein, humanRad51 Recombinase

Identifiers

PMID30032296
PMCPMC6158596
OpenAlexW2951673912

What OpenQuestion holds

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LicenceCC BY-NC
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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.