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Differences in MWCNT- and SWCNT-induced DNA methylation alterations in association with the nuclear deposition

Overview of attention for article published in Particle and Fibre Toxicology, February 2018
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Title
Differences in MWCNT- and SWCNT-induced DNA methylation alterations in association with the nuclear deposition
Published in
Particle and Fibre Toxicology, February 2018
DOI 10.1186/s12989-018-0244-6
Pubmed ID
Authors

Deniz Öner, Manosij Ghosh, Hannelore Bové, Matthieu Moisse, Bram Boeckx, Radu C. Duca, Katrien Poels, Katrien Luyts, Eveline Putzeys, Kirsten Van Landuydt, Jeroen AJ Vanoirbeek, Marcel Ameloot, Diether Lambrechts, Lode Godderis, Peter HM Hoet

Abstract

Subtle DNA methylation alterations mediated by carbon nanotubes (CNTs) exposure might contribute to pathogenesis and disease susceptibility. It is known that both multi-walled carbon nanotubes (MWCNTs) and single-walled carbon nanotubes (SWCNTs) interact with nucleus. Such, nuclear-CNT interaction may affect the DNA methylation effects. In order to understand the epigenetic toxicity, in particular DNA methylation alterations, of SWCNTs and short MWCNTs, we performed global/genome-wide, gene-specific DNA methylation and RNA-expression analyses after exposing human bronchial epithelial cells (16HBE14o- cell line). In addition, the presence of CNTs on/in the cell nucleus was evaluated in a label-free way using femtosecond pulsed laser microscopy. Generally, a higher number of SWCNTs, compared to MWCNTs, was deposited at both the cellular and nuclear level after exposure. Nonetheless, both CNT types were in physical contact with the nuclei. While particle type dependency was noticed for the identified genome-wide and gene-specific alterations, no global DNA methylation alteration on 5-methylcytosine (5-mC) sites was observed for both CNTs. After exposure to MWCNTs, 2398 genes were hypomethylated (at gene promoters), and after exposure to SWCNTs, 589 CpG sites (located on 501 genes) were either hypo- (N = 493 CpG sites) or hypermethylated (N = 96 CpG sites). Cells exposed to MWCNTs exhibited a better correlation between gene promoter methylation and gene expression alterations. Differentially methylated and expressed genes induced changes (MWCNTs > SWCNTs) at different cellular pathways, such as p53 signalling, DNA damage repair and cell cycle. On the other hand, SWCNT exposure showed hypermethylation on functionally important genes, such as SKI proto-oncogene (SKI), glutathione S-transferase pi 1 (GTSP1) and shroom family member 2 (SHROOM2) and neurofibromatosis type I (NF1), which the latter is both hypermethylated and downregulated. After exposure to both types of CNTs, epigenetic alterations may contribute to toxic or repair response. Moreover, our results suggest that the observed differences in the epigenetic response depend on particle type and differential CNT-nucleus interactions.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 57 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 57 100%

Demographic breakdown

Readers by professional status Count As %
Researcher 12 21%
Student > Ph. D. Student 7 12%
Student > Bachelor 7 12%
Student > Master 6 11%
Student > Postgraduate 3 5%
Other 6 11%
Unknown 16 28%
Readers by discipline Count As %
Biochemistry, Genetics and Molecular Biology 8 14%
Pharmacology, Toxicology and Pharmaceutical Science 5 9%
Engineering 3 5%
Medicine and Dentistry 3 5%
Chemical Engineering 3 5%
Other 14 25%
Unknown 21 37%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 24 October 2018.
All research outputs
#12,769,783
of 23,023,224 outputs
Outputs from Particle and Fibre Toxicology
#282
of 562 outputs
Outputs of similar age
#200,750
of 442,600 outputs
Outputs of similar age from Particle and Fibre Toxicology
#7
of 14 outputs
Altmetric has tracked 23,023,224 research outputs across all sources so far. This one is in the 44th percentile – i.e., 44% of other outputs scored the same or lower than it.
So far Altmetric has tracked 562 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 15.3. This one is in the 49th percentile – i.e., 49% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 442,600 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 54% of its contemporaries.
We're also able to compare this research output to 14 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 50% of its contemporaries.