Histone Methylation in Nickel-Smelting Industrial Workers

Nickel is an essential trace metal naturally found in the environment. It is also common in occupational settings, where it associates with various levels of both occupational and nonoccupational exposure In vitro studies have shown that nickel exposure can lead to intracellular accumulation of Ni2+...

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Veröffentlicht in:PloS one 2015-10, Vol.10 (10), p.e0140339
Hauptverfasser: Ma, Li, Bai, Yana, Pu, Hongquan, Gou, Faxiang, Dai, Min, Wang, Hui, He, Jie, Zheng, Tongzhang, Cheng, Ning
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container_title PloS one
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Bai, Yana
Pu, Hongquan
Gou, Faxiang
Dai, Min
Wang, Hui
He, Jie
Zheng, Tongzhang
Cheng, Ning
description Nickel is an essential trace metal naturally found in the environment. It is also common in occupational settings, where it associates with various levels of both occupational and nonoccupational exposure In vitro studies have shown that nickel exposure can lead to intracellular accumulation of Ni2+, which has been associated with global decreases in DNA methylation, increases in chromatin condensation, reductions in H3K9me2, and elevated levels of H3K4me3. Histone modifications play an important role in modulating chromatin structure and gene expression. For example, tri-methylation of histone H3k4 has been found to be associated with transcriptional activation, and tri-methylation of H3k27 has been found to be associated with transcriptional repression. Aberrant histone modifications have been found to be associated with various human diseases, including cancer. The purpose of this work was to identify biomarkers for populations with occupational nickel exposure and to examine the relationship between histone methylation and nickel exposure. This may provide a scientific indicator of early health impairment and facilitate exploration of the molecular mechanism underlying cancer pathogenesis. One hundred and forty subjects with occupational exposure to Ni and 140 referents were recruited. H3K4 and H3K27 trimethylation levels were measured in subjects' blood cells. H3K4me3 levels were found to be higher in nickel smelting workers (47.24±20.85) than in office workers (22.65±8.81; P = 0.000), while the opposite was found for levels of H3K27me3(nickel smelting workers, 13.88± 4.23; office workers, 20.67± 5.96; P = 0.000). H3K4me3 was positively (r = 0.267, P = 0.001) and H3K27 was negatively (r = -0.684, P = 0.000) associated with age and length of service in smelting workers. This study indicated that occupational exposure to Ni is associated with alterations in levels of histone modification.
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It is also common in occupational settings, where it associates with various levels of both occupational and nonoccupational exposure In vitro studies have shown that nickel exposure can lead to intracellular accumulation of Ni2+, which has been associated with global decreases in DNA methylation, increases in chromatin condensation, reductions in H3K9me2, and elevated levels of H3K4me3. Histone modifications play an important role in modulating chromatin structure and gene expression. For example, tri-methylation of histone H3k4 has been found to be associated with transcriptional activation, and tri-methylation of H3k27 has been found to be associated with transcriptional repression. Aberrant histone modifications have been found to be associated with various human diseases, including cancer. The purpose of this work was to identify biomarkers for populations with occupational nickel exposure and to examine the relationship between histone methylation and nickel exposure. This may provide a scientific indicator of early health impairment and facilitate exploration of the molecular mechanism underlying cancer pathogenesis. One hundred and forty subjects with occupational exposure to Ni and 140 referents were recruited. H3K4 and H3K27 trimethylation levels were measured in subjects' blood cells. H3K4me3 levels were found to be higher in nickel smelting workers (47.24±20.85) than in office workers (22.65±8.81; P = 0.000), while the opposite was found for levels of H3K27me3(nickel smelting workers, 13.88± 4.23; office workers, 20.67± 5.96; P = 0.000). H3K4me3 was positively (r = 0.267, P = 0.001) and H3K27 was negatively (r = -0.684, P = 0.000) associated with age and length of service in smelting workers. 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This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2015 Ma et al 2015 Ma et al</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c692t-4ad3152c24bb240279bd9af40cdc7af27da6850ccea3fde7582b411cdc0c61713</citedby><cites>FETCH-LOGICAL-c692t-4ad3152c24bb240279bd9af40cdc7af27da6850ccea3fde7582b411cdc0c61713</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4608576/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC4608576/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,864,885,2102,2928,23866,27924,27925,53791,53793,79600,79601</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/26474320$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><contributor>Costa, Max</contributor><creatorcontrib>Ma, Li</creatorcontrib><creatorcontrib>Bai, Yana</creatorcontrib><creatorcontrib>Pu, Hongquan</creatorcontrib><creatorcontrib>Gou, Faxiang</creatorcontrib><creatorcontrib>Dai, Min</creatorcontrib><creatorcontrib>Wang, Hui</creatorcontrib><creatorcontrib>He, Jie</creatorcontrib><creatorcontrib>Zheng, Tongzhang</creatorcontrib><creatorcontrib>Cheng, Ning</creatorcontrib><title>Histone Methylation in Nickel-Smelting Industrial Workers</title><title>PloS one</title><addtitle>PLoS One</addtitle><description>Nickel is an essential trace metal naturally found in the environment. 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It is also common in occupational settings, where it associates with various levels of both occupational and nonoccupational exposure In vitro studies have shown that nickel exposure can lead to intracellular accumulation of Ni2+, which has been associated with global decreases in DNA methylation, increases in chromatin condensation, reductions in H3K9me2, and elevated levels of H3K4me3. Histone modifications play an important role in modulating chromatin structure and gene expression. For example, tri-methylation of histone H3k4 has been found to be associated with transcriptional activation, and tri-methylation of H3k27 has been found to be associated with transcriptional repression. Aberrant histone modifications have been found to be associated with various human diseases, including cancer. The purpose of this work was to identify biomarkers for populations with occupational nickel exposure and to examine the relationship between histone methylation and nickel exposure. This may provide a scientific indicator of early health impairment and facilitate exploration of the molecular mechanism underlying cancer pathogenesis. One hundred and forty subjects with occupational exposure to Ni and 140 referents were recruited. H3K4 and H3K27 trimethylation levels were measured in subjects' blood cells. H3K4me3 levels were found to be higher in nickel smelting workers (47.24±20.85) than in office workers (22.65±8.81; P = 0.000), while the opposite was found for levels of H3K27me3(nickel smelting workers, 13.88± 4.23; office workers, 20.67± 5.96; P = 0.000). H3K4me3 was positively (r = 0.267, P = 0.001) and H3K27 was negatively (r = -0.684, P = 0.000) associated with age and length of service in smelting workers. This study indicated that occupational exposure to Ni is associated with alterations in levels of histone modification.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>26474320</pmid><doi>10.1371/journal.pone.0140339</doi><oa>free_for_read</oa></addata></record>
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subjects Adult
Age
Analysis
Bioindicators
Biomarkers
Biomarkers - analysis
Blood cells
Cancer
Case-Control Studies
Chromatin
Deoxyribonucleic acid
DNA
DNA Methylation
Epidemiology
Epigenetics
Exposure
Factories
Food contamination & poisoning
Gene expression
Gene silencing
Health aspects
Histone Code
Histones
Histones - chemistry
Hospitals
Humans
Hypoxia
Kinases
Lung cancer
Male
Metallurgy
Methylation
Middle Aged
Mutation
Nickel
Nickel (Metal)
Nickel - adverse effects
Occupational exposure
Occupational Exposure - adverse effects
Occupational health
Occupational safety and health
Pathogenesis
Public health
RNA polymerase
Smelters
Smelting
Studies
Trace metals
Transcription activation
Workers
Young Adult
title Histone Methylation in Nickel-Smelting Industrial Workers
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