Metallothioneins (MTs) and δ-aminolevulinic acid dehydratase (ALAd) as biomarkers of metal pollution in great tits ( Parus major) along a pollution gradient

Biomonitoring allows an integrated evaluation of different aspects of exposure, accumulation and effects to environmental pollution, simultaneously accounting for the natural variety between individuals in an ecosystem. In this study, the effects of increased metal accumulation were evaluated at the...

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Veröffentlicht in:The Science of the total environment 2008-08, Vol.401 (1), p.184-193
Hauptverfasser: Vanparys, Caroline, Dauwe, Tom, Van Campenhout, Karen, Bervoets, Lieven, De Coen, Wim, Blust, Ronny, Eens, Marcel
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container_issue 1
container_start_page 184
container_title The Science of the total environment
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creator Vanparys, Caroline
Dauwe, Tom
Van Campenhout, Karen
Bervoets, Lieven
De Coen, Wim
Blust, Ronny
Eens, Marcel
description Biomonitoring allows an integrated evaluation of different aspects of exposure, accumulation and effects to environmental pollution, simultaneously accounting for the natural variety between individuals in an ecosystem. In this study, the effects of increased metal accumulation were evaluated at the biochemical level in terms of two biomarker responses in the great tit ( Parus major), a small insectivorous songbird, along an established metal pollution gradient. Metal concentrations in internal tissues (liver and kidney) and blood indicated that lead and cadmium were the most important metals in the pollution gradient under study. At the biochemical level, induction of metal binding protein metallothionein (MT) in liver and kidney reflected cadmium concentrations in these tissues ( R 2 = 0.42 and R 2 = 0.94 respectively, n = 19), although in kidney, MT induction was not sufficient to complex all cadmium present. Secondly, the activity of the enzyme δ-aminolevulinic acid dehydratase (ALAd) in blood decreased exponentially in response to increased lead accumulation ( R 2 = 0.70, n = 18) and represents therefore a specific effect marker for lead exposure. In the highest polluted area, an ALAd inhibition of 85% was reported. Since a higher metal exposure resulted in an increased metal accumulation and subsequent biomarker responses in a dose-dependent way, this study indicates the applicability of ALAd and MT levels in great tits for biomonitoring responses to heavy metal pollution.
doi_str_mv 10.1016/j.scitotenv.2008.04.009
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In the highest polluted area, an ALAd inhibition of 85% was reported. Since a higher metal exposure resulted in an increased metal accumulation and subsequent biomarker responses in a dose-dependent way, this study indicates the applicability of ALAd and MT levels in great tits for biomonitoring responses to heavy metal pollution.</abstract><cop>Netherlands</cop><pub>Elsevier B.V</pub><pmid>18499231</pmid><doi>10.1016/j.scitotenv.2008.04.009</doi><tpages>10</tpages></addata></record>
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subjects Accounting
aminolevulinic acid
Animals
Binding
Biochemistry
Biology
biomarkers
Biomarkers - analysis
Biomonitoring
Birds
Blood
Cadmium
Cadmium - blood
Cadmium - pharmacokinetics
Concentration gradient
Dehydration
Dose-Response Relationship, Drug
Ecosystems
Environmental Monitoring
Environmental Pollutants - blood
Environmental Pollutants - pharmacokinetics
Enzymes
Geography
Heavy metals
indicator species
Inhibition
Kidney - drug effects
Kidney - metabolism
Kidneys
Lead - blood
Lead - pharmacokinetics
Liver
Liver - drug effects
Liver - metabolism
Markers
Metallothionein
Metallothionein - blood
Metallothionein - pharmacology
Metals, Heavy - blood
Metals, Heavy - pharmacokinetics
Parus major
pollution
Pollution abatement
Porphobilinogen Synthase - antagonists & inhibitors
Porphobilinogen Synthase - blood
Porphobilinogen Synthase - pharmacokinetics
Proteins
Tissue Distribution
Toxicology
wild birds
Zinc - blood
Zinc - pharmacokinetics
δ-Aminolevulinic acid dehydratase
title Metallothioneins (MTs) and δ-aminolevulinic acid dehydratase (ALAd) as biomarkers of metal pollution in great tits ( Parus major) along a pollution gradient
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