Evidence map›Paper›PMID 22230562›Full record

ArticleToxicology in vitro : an international journal published in association with BIBRA2012

The effects of methylmercury on Notch signaling during embryonic neural development in Drosophila melanogaster.

G L Engel, A Delwig, M D Rand

Abstract read
In one paragraph

Article in Toxicology in vitro : an international journal published in association with BIBRA, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
–field-weighted citation impact
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

14 citing papers in PubMed.

  1. Review
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  7. The road less traveled: from genotype to phenotype in flies and humans.Mammalian genome : official journal of the International Mammalian Genome Society · 2018
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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

3 authors.

G L EngelDepartment of Anatomy and Neurobiology, College of Medicine, University of Vermont, USA.
A Delwig
M D Rand

Funding

ENVIRONMENTAL PATHOLOGY TRAINING PROGRAMT32ES007122 · NIEHS · UNIVERSITY OF VERMONT &ST AGRIC COLLEGE · PI VAN DER VLIET, ALBERT · 1985 to 2012
$4.2M
Mechanisms of methylmercury toxicity in neural developmentR01ES015550 · NIEHS · UNIVERSITY OF VERMONT & ST AGRIC COLLEGE · PI RAND, MATTHEW D · 2007 to 2011
$1.4M
NIEHS NIH HHS R01 ES015550NIEHS NIH HHS R01-ES015550NIEHS NIH HHS T32 ES007122NIEHS NIH HHS T32-ES07122
6 · The paper itself

Abstract

Methylmercury (MeHg) is a ubiquitous toxicant that targets the developing fetal nervous system. MeHg interacts with the Notch signaling pathway, a highly-conserved intercellular signaling mechanism required for normal development. Notch signaling is conveyed by activation of the genes in the enhancer of split (E(spl)) locus in Drosophila. We have previously shown that acute high doses of MeHg upregulate several E(spl) genes in Drosophila neural-derived C6 cells. Furthermore, MeHg induction of E(spl) can occur independent of the Notch receptor itself. We now show that MeHg, unlike inorganic mercury (HgCl2), preferentially upregulates E(spl)mδ and E(spl)mγ in Drosophila C6 cells. This is distinct from Delta ligand-induced Notch signaling in which no induction of E(spl)mδ is seen. MeHg is also seen to specifically upregulate E(spl)mδ in Drosophila embryos where HgCl2 showed no such effect. Additionally, treatment of embryos with MeHg caused a consistent failure in axonal outgrowth of the intersegmental nerve (ISN). This ISN phenotype was partially replicated by genetic activation of the Notch pathway, but was not replicated by increasing expression of E(spl)mδ. These data suggest a role for Notch signaling and the E(spl)mδ target gene in MeHg toxicity, however, the site of action for E(spl)mδ in this system remains to be elucidated.

Indexed as

AnimalsBasic Helix-Loop-Helix ProteinsCell LineDrosophila melanogasterDrosophila ProteinsEmbryonic DevelopmentEmbryo, NonmammalianGene Expression Regulation, DevelopmentalMethylmercury CompoundsNeuronsReceptors, NotchRepressor ProteinsSignal TransductionUp-RegulationBasic Helix-Loop-Helix ProteinsDrosophila ProteinsE(spl)mdelta-HLH protein, DrosophilaE(spl)mgamma-HLH protein, Drosophilamethylmercuric chlorideMethylmercury CompoundsReceptors, NotchRepressor Proteins

Identifiers

PMID22230562
PMCPMC3294174

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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.