Formation and persistence of DNA adducts formed by the carcinogenic air pollutant 3-nitrobenzanthrone in target and non-target organs after intratracheal instillation in rats.

2.50
Hdl Handle:
http://hdl.handle.net/10146/24132
Title:
Formation and persistence of DNA adducts formed by the carcinogenic air pollutant 3-nitrobenzanthrone in target and non-target organs after intratracheal instillation in rats.
Authors:
Bieler, Christian A.; Cornelius, Michael G.; Stiborova, Marie; Arlt, Volker M.; Wiessler, Manfred; Phillips, David H.; Schmeiser, Heinz H.
Abstract:
Sprague-Dawley rats were treated by intratracheal instillation with a single dose of 0.2 mg/kg body wt of 3-nitrobenzanthrone (3-NBA), and whole blood, lungs, pancreases, kidneys, urinary bladders, hearts, small intestines and livers were removed at various times after administration. At five posttreatment times (2 days, 2, 10, 20 and 36 weeks), DNA adducts were analysed in each tissue by (32)P-postlabelling to study their long-term persistence. 3-NBA-derived DNA adducts consisting of the same adduct pattern were observed in all tissues from animals killed between 2 days and 36 weeks and between 2 days and 20 weeks in blood. DNA isolated from whole blood contained the same 3-NBA-specific adduct pattern as that found in tissues. Although total adduct levels in the blood were much lower than those found in the lung, the target organ of 3-NBA tumourigenicity, they were related (20-25%, R(2) = 0.98) to the levels found in lung. In all organs, total adduct levels decreased over time to 20-30% of the initial levels till the latest time point (36 weeks) and showed a biphasic profile, with a rapid loss during the first 2 weeks followed by a much slower decline that reached a stable plateau at 20 weeks after treatment. These results show that uptake of 3-NBA by the lung induces high levels of specific DNA adducts in target and non-target organs of the rat. The correlation between DNA adducts in lung and blood suggests that persistent 3-NBA-DNA adducts in the blood may be useful biomarkers for human respiratory exposure to 3-NBA.
Citation:
Carcinogenesis 2007, 28 (5):1117-1121
Journal:
Carcinogenesis
Issue Date:
May-2007
URI:
http://hdl.handle.net/10146/24132
DOI:
10.1093/carcin/bgl219
PubMed ID:
17114646
Additional Links:
http://carcin.oxfordjournals.org/cgi/content/full/28/5/1117
Type:
Article
Language:
en
ISSN:
0143-3334
Sponsors:
V.M.A. and D.H.P. are members of the European Environmental Cancer Risk, Nutrition and Individual Susceptibility Network of Excellence.
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorBieler, Christian A.-
dc.contributor.authorCornelius, Michael G.-
dc.contributor.authorStiborova, Marie-
dc.contributor.authorArlt, Volker M.-
dc.contributor.authorWiessler, Manfred-
dc.contributor.authorPhillips, David H.-
dc.contributor.authorSchmeiser, Heinz H.-
dc.date.accessioned2008-04-24T10:40:26Z-
dc.date.available2008-04-24T10:40:26Z-
dc.date.issued2007-05-
dc.identifier.citationCarcinogenesis 2007, 28 (5):1117-1121en
dc.identifier.issn0143-3334-
dc.identifier.pmid17114646-
dc.identifier.doi10.1093/carcin/bgl219-
dc.identifier.urihttp://hdl.handle.net/10146/24132-
dc.description.abstractSprague-Dawley rats were treated by intratracheal instillation with a single dose of 0.2 mg/kg body wt of 3-nitrobenzanthrone (3-NBA), and whole blood, lungs, pancreases, kidneys, urinary bladders, hearts, small intestines and livers were removed at various times after administration. At five posttreatment times (2 days, 2, 10, 20 and 36 weeks), DNA adducts were analysed in each tissue by (32)P-postlabelling to study their long-term persistence. 3-NBA-derived DNA adducts consisting of the same adduct pattern were observed in all tissues from animals killed between 2 days and 36 weeks and between 2 days and 20 weeks in blood. DNA isolated from whole blood contained the same 3-NBA-specific adduct pattern as that found in tissues. Although total adduct levels in the blood were much lower than those found in the lung, the target organ of 3-NBA tumourigenicity, they were related (20-25%, R(2) = 0.98) to the levels found in lung. In all organs, total adduct levels decreased over time to 20-30% of the initial levels till the latest time point (36 weeks) and showed a biphasic profile, with a rapid loss during the first 2 weeks followed by a much slower decline that reached a stable plateau at 20 weeks after treatment. These results show that uptake of 3-NBA by the lung induces high levels of specific DNA adducts in target and non-target organs of the rat. The correlation between DNA adducts in lung and blood suggests that persistent 3-NBA-DNA adducts in the blood may be useful biomarkers for human respiratory exposure to 3-NBA.en
dc.description.sponsorshipV.M.A. and D.H.P. are members of the European Environmental Cancer Risk, Nutrition and Individual Susceptibility Network of Excellence.en
dc.language.isoenen
dc.relation.urlhttp://carcin.oxfordjournals.org/cgi/content/full/28/5/1117en
dc.subject.meshAir Pollutants-
dc.subject.meshAnimals-
dc.subject.meshBenz(a)Anthracenes-
dc.subject.meshDNA Adducts-
dc.subject.meshDrug Administration Routes-
dc.subject.meshFemale-
dc.subject.meshLung-
dc.subject.meshRats-
dc.subject.meshRats, Sprague-Dawley-
dc.subject.meshTime Factors-
dc.subject.meshTrachea-
dc.titleFormation and persistence of DNA adducts formed by the carcinogenic air pollutant 3-nitrobenzanthrone in target and non-target organs after intratracheal instillation in rats.en
dc.typeArticleen
dc.identifier.journalCarcinogenesisen

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