Evidence map›Paper›PMID 28575672›Full record

ArticleCell2017

A Class of Environmental and Endogenous Toxins Induces BRCA2 Haploinsufficiency and Genome Instability.

Shawn Lu Wen Tan, Saakshi Chadha, Yansheng Liu, Evelina Gabasova, David Perera, Karim Ahmed, Stephanie Constantinou, Xavier Renaudin, MiYoung Lee, Ruedi Aebersold and 1 more

Open access · hybridAbstract read
In one paragraph

Article in Cell, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 101 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
101citing papers in PubMed, 3 pooled it
9.6field-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

101 citing papers in PubMed, 3 syntheses or guidelines pooled it, 217 citations in OpenAlex.

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41 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors at 3 institutions in 2 countries.

Shawn Lu Wen TanMedical Research Council Cancer Unit, University of Cambridge, Hills Road, Cambridge CB2 0XZ, UK.
Saakshi ChadhaMedical Research Council Cancer Unit, University of Cambridge, Hills Road, Cambridge CB2 0XZ, UK.
Yansheng LiuDepartment of Biology, Institute of Molecular Systems Biology, Eidgenössische Technische Hochschule, 8093 Zürich, Switzerland.
Evelina GabasovaMedical Research Council Cancer Unit, University of Cambridge, Hills Road, Cambridge CB2 0XZ, UK.
David PereraMedical Research Council Cancer Unit, University of Cambridge, Hills Road, Cambridge CB2 0XZ, UK.
Karim AhmedMedical Research Council Cancer Unit, University of Cambridge, Hills Road, Cambridge CB2 0XZ, UK.
Stephanie ConstantinouMedical Research Council Cancer Unit, University of Cambridge, Hills Road, Cambridge CB2 0XZ, UK.
Xavier RenaudinMedical Research Council Cancer Unit, University of Cambridge, Hills Road, Cambridge CB2 0XZ, UK.
MiYoung LeeMedical Research Council Cancer Unit, University of Cambridge, Hills Road, Cambridge CB2 0XZ, UK.
Ruedi AebersoldDepartment of Biology, Institute of Molecular Systems Biology, Eidgenössische Technische Hochschule, 8093 Zürich, Switzerland; Faculty of Science, University of Zürich, 8006 Zürich, Switzerland.
Ashok R VenkitaramanMedical Research Council Cancer Unit, University of Cambridge, Hills Road, Cambridge CB2 0XZ, UK. Electronic address: arv22@mrc-cu.cam.ac.uk.
Medical Research Council · GBUniversity of Cambridge · GBUniversity of Zurich · CH

Funding

Medical Research Council G1001521Medical Research Council G1001522Medical Research Council MC_UU_12022/1Medical Research Council MC_UU_12022/8
6 · The paper itself

Abstract

Mutations truncating a single copy of the tumor suppressor, BRCA2, cause cancer susceptibility. In cells bearing such heterozygous mutations, we find that a cellular metabolite and ubiquitous environmental toxin, formaldehyde, stalls and destabilizes DNA replication forks, engendering structural chromosomal aberrations. Formaldehyde selectively depletes BRCA2 via proteasomal degradation, a mechanism of toxicity that affects very few additional cellular proteins. Heterozygous BRCA2 truncations, by lowering pre-existing BRCA2 expression, sensitize to BRCA2 haploinsufficiency induced by transient exposure to natural concentrations of formaldehyde. Acetaldehyde, an alcohol catabolite detoxified by ALDH2, precipitates similar effects. Ribonuclease H1 ameliorates replication fork instability and chromosomal aberrations provoked by aldehyde-induced BRCA2 haploinsufficiency, suggesting that BRCA2 inactivation triggers spontaneous mutagenesis during DNA replication via aberrant RNA-DNA hybrids (R-loops). These findings suggest a model wherein carcinogenesis in BRCA2 mutation carriers can be incited by compounds found pervasively in the environment and generated endogenously in certain tissues with implications for public health.

Indexed as

BRCA2 ProteinChromosome AberrationsDNA-Binding ProteinsDNA DamageDNA ReplicationFormaldehydeGenomic InstabilityHaploinsufficiencyHeLa CellsHumansMRE11 Homologue ProteinProteomeRibonuclease HToxins, BiologicalBRCA2 ProteinBRCA2 protein, humanDNA-Binding ProteinsFormaldehydeMRE11 Homologue ProteinMRE11 protein, humanProteomeRibonuclease Hribonuclease HIToxins, BiologicalacetaldehydealdehydeBRCA2formaldehydeinduced haploinsufficiencyproteasomal degradationreplication stressR-loopSWATH-MS

Identifiers

PMID28575672
PMCPMC5457488
OpenAlexW2621142869

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.