Exposure to ultrafine particles from ambient air and oxidative stress-induced DNA damage.

2.50
Hdl Handle:
http://hdl.handle.net/10146/24115
Title:
Exposure to ultrafine particles from ambient air and oxidative stress-induced DNA damage.
Authors:
Brauner, Elvira Vaclavik; Forchhammer, Lykke; Moller, Peter; Simonsen, Jacob; Glasius, Marianne; Wahlin, Peter; Raaschou-Nielsen, Ole; Loft, Steffen
Abstract:
BACKGROUND: Particulate matter, especially ultrafine particles (UFPs), may cause health effects through generation of oxidative stress, with resulting damage to DNA and other macromolecules. OBJECTIVE: We investigated oxidative damage to DNA and related repair capacity in peripheral blood mononuclear cells (PBMCs) during controlled exposure to urban air particles with assignment of number concentration (NC) to four size modes with average diameters of 12, 23, 57, and 212 nm. DESIGN: Twenty-nine healthy adults participated in a randomized, two-factor cross-over study with or without biking exercise for 180 min and with exposure to particles (NC 6169-15362/cm(3)) or filtered air (NC 91-542/cm(3)) for 24 hr. METHODS: The levels of DNA strand breaks (SBs), oxidized purines as formamidopyrimidine DNA glycolase (FPG) sites, and activity of 7,8-dihydro-8-oxoguanine-DNA glycosylase (OGG1) in PBMCs were measured by the Comet assay. mRNA levels of OGG1, nucleoside diphosphate linked moiety X-type motif 1 (NUDT1), and heme oxygenase-1 (HO1) were determined by real-time reverse transcriptase-polymerase chain reaction. RESULTS: Exposure to UFPs for 6 and 24 hr significantly increased the levels of SBs and FPG sites, with a further insignificant increase after physical exercise. The OGG1 activity and expression of OGG1, NUDT1, and HO1 were unaltered. There was a significant dose-response relationship between NC and DNA damage, with the 57-nm mode as the major contributor to effects. Concomitant exposure to ozone, nitrogen oxides, and carbon monoxide had no influence. CONCLUSION: Our results indicate that UFPs, especially the 57-nm soot fraction from vehicle emissions, causes systemic oxidative stress with damage to DNA and no apparent compensatory up-regulation of DNA repair within 24 hr.
Citation:
Environ. Health Perspect. 2007, 115 (8):1177-1182
Journal:
Environmental health perspectives
Issue Date:
Aug-2007
URI:
http://hdl.handle.net/10146/24115
DOI:
10.1289/ehp.9984
PubMed ID:
17687444
Additional Links:
http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&pubmedid=17687444
Type:
Article
Language:
en
ISSN:
0091-6765
Sponsors:
This work was supported by the Danish National Research Councils and ECNIS (Environmental Cancer Risk, Nutrition and Individual Susceptibility), a network of excellence operating within the European Union 6th Framework Program, Priority 5: “Food Quality and Safety” (contract no 513943).
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorBrauner, Elvira Vaclavik-
dc.contributor.authorForchhammer, Lykke-
dc.contributor.authorMoller, Peter-
dc.contributor.authorSimonsen, Jacob-
dc.contributor.authorGlasius, Marianne-
dc.contributor.authorWahlin, Peter-
dc.contributor.authorRaaschou-Nielsen, Ole-
dc.contributor.authorLoft, Steffen-
dc.date.accessioned2008-04-24T10:51:16Z-
dc.date.available2008-04-24T10:51:16Z-
dc.date.issued2007-08-
dc.identifier.citationEnviron. Health Perspect. 2007, 115 (8):1177-1182en
dc.identifier.issn0091-6765-
dc.identifier.pmid17687444-
dc.identifier.doi10.1289/ehp.9984-
dc.identifier.urihttp://hdl.handle.net/10146/24115-
dc.description.abstractBACKGROUND: Particulate matter, especially ultrafine particles (UFPs), may cause health effects through generation of oxidative stress, with resulting damage to DNA and other macromolecules. OBJECTIVE: We investigated oxidative damage to DNA and related repair capacity in peripheral blood mononuclear cells (PBMCs) during controlled exposure to urban air particles with assignment of number concentration (NC) to four size modes with average diameters of 12, 23, 57, and 212 nm. DESIGN: Twenty-nine healthy adults participated in a randomized, two-factor cross-over study with or without biking exercise for 180 min and with exposure to particles (NC 6169-15362/cm(3)) or filtered air (NC 91-542/cm(3)) for 24 hr. METHODS: The levels of DNA strand breaks (SBs), oxidized purines as formamidopyrimidine DNA glycolase (FPG) sites, and activity of 7,8-dihydro-8-oxoguanine-DNA glycosylase (OGG1) in PBMCs were measured by the Comet assay. mRNA levels of OGG1, nucleoside diphosphate linked moiety X-type motif 1 (NUDT1), and heme oxygenase-1 (HO1) were determined by real-time reverse transcriptase-polymerase chain reaction. RESULTS: Exposure to UFPs for 6 and 24 hr significantly increased the levels of SBs and FPG sites, with a further insignificant increase after physical exercise. The OGG1 activity and expression of OGG1, NUDT1, and HO1 were unaltered. There was a significant dose-response relationship between NC and DNA damage, with the 57-nm mode as the major contributor to effects. Concomitant exposure to ozone, nitrogen oxides, and carbon monoxide had no influence. CONCLUSION: Our results indicate that UFPs, especially the 57-nm soot fraction from vehicle emissions, causes systemic oxidative stress with damage to DNA and no apparent compensatory up-regulation of DNA repair within 24 hr.en
dc.description.sponsorshipThis work was supported by the Danish National Research Councils and ECNIS (Environmental Cancer Risk, Nutrition and Individual Susceptibility), a network of excellence operating within the European Union 6th Framework Program, Priority 5: “Food Quality and Safety” (contract no 513943).en
dc.language.isoenen
dc.relation.urlhttp://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&pubmedid=17687444en
dc.subjectair pollutionen
dc.subjectbiomarkersen
dc.subjectComet assayen
dc.subjectDNA repairen
dc.subjectoxidative DNA damageen
dc.subjectultrafine particlesen
dc.subject.meshAdult-
dc.subject.meshAir Pollutants-
dc.subject.meshCarbon Monoxide-
dc.subject.meshCross-Over Studies-
dc.subject.meshDNA Damage-
dc.subject.meshDNA Glycosylases-
dc.subject.meshDNA Repair-
dc.subject.meshDNA Repair Enzymes-
dc.subject.meshExercise-
dc.subject.meshFemale-
dc.subject.meshGuanine-
dc.subject.meshHeme Oxygenase-1-
dc.subject.meshHumans-
dc.subject.meshLeukocytes, Mononuclear-
dc.subject.meshMale-
dc.subject.meshNitrogen Oxides-
dc.subject.meshOxidative Stress-
dc.subject.meshOzone-
dc.subject.meshParticle Size-
dc.subject.meshParticulate Matter-
dc.subject.meshPhosphoric Monoester Hydrolases-
dc.subject.meshRNA, Messenger-
dc.subject.meshVehicle Emissions-
dc.titleExposure to ultrafine particles from ambient air and oxidative stress-induced DNA damage.en
dc.typeArticleen
dc.identifier.journalEnvironmental health perspectivesen

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