Natural mixtures of persistent organic pollutants (POPs) suppress ovarian follicle development, liver vitellogenin immunostaining and hepatocyte proliferation in female zebrafish (Danio rerio)
Identifieur interne : 000233 ( Main/Exploration ); précédent : 000232; suivant : 000234Natural mixtures of persistent organic pollutants (POPs) suppress ovarian follicle development, liver vitellogenin immunostaining and hepatocyte proliferation in female zebrafish (Danio rerio)
Auteurs : Marianne Kraugerud [Norvège] ; Richard William Doughty [Norvège] ; Jan L. Lyche [Norvège] ; Vidar Berg [Norvège] ; Nina H. Tremoen [Norvège] ; Peter Alestr M [Norvège] ; Mona Aleksandersen [Norvège] ; Erik Ropstad [Norvège]Source :
- Aquatic toxicology [ 0166-445X ] ; 2012.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Milieu aquatique.
English descriptors
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Abstract
Persistent organic pollutants such as polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and dichlorodiphenyltrichloroethane (DDT) are present in high concentrations in livers of burbot (Lota lota) in Lake Mjøsa, Norway. In order to assess effects of such pollutants on fish gonadal morphology, female zebrafish were exposed in two generations by food to mixtures of pollutants extracted from livers of burbot from Lake Mjøsa (high and low dose) and Lake Losna, which represents background pollution, and compared to a control group. Ovarian follicle counts detected a significant decrease in late vitellogenic follicle stages in fish exposed to the Losna and the high concentrations of Mjøsa mixtures in fish from the first generation. In addition, proliferation of granulosa cells, visualized by immunohistochemistry against proliferating cell nuclear antigen (PCNA), was decreased in all exposure groups in either early or late vitellogenic follicle stages compared to control. This was accompanied by increased apoptosis of granulosa cells. There was a decrease in proliferation of liver hepatocytes with exposure to both Mjøsa mixtures. In addition, immunopositivity for vitellogenin in the liver was significantly lower in the Mjøsa high group than in the control group. When analysing effects of parental exposure, fish with parents exposed to Mjøsa high mixture had significantly higher numbers of perinucleolar follicles than fish with control parents. We conclude that long-term exposure of a real-life mixture of pollutants containing high- and background levels of chemicals supress ovarian follicle development, liver vitellogenin immunostaining intensity and hepatocyte proliferation in the zebrafish model.
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Lyche</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Dept. of Food Safety and Infection Biology, Norwegian School of Veterinary Science, POB 8146 Dep.</s1><s2>0033 Oslo</s2><s3>NOR</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Norvège</country><placeName><settlement type="city">Oslo</settlement><region nuts="2">Østlandet</region></placeName></affiliation></author><author><name sortKey="Berg, Vidar" sort="Berg, Vidar" uniqKey="Berg V" first="Vidar" last="Berg">Vidar Berg</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Dept. of Food Safety and Infection Biology, Norwegian School of Veterinary Science, POB 8146 Dep.</s1><s2>0033 Oslo</s2><s3>NOR</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Norvège</country><placeName><settlement type="city">Oslo</settlement><region nuts="2">Østlandet</region></placeName></affiliation></author><author><name sortKey="Tremoen, Nina H" sort="Tremoen, Nina H" uniqKey="Tremoen N" first="Nina H." last="Tremoen">Nina H. Tremoen</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Dept. of Production Animal Clinical Sciences, Norwegian School of Veterinary Science, POB 8146 Dep.</s1><s2>0033 Oslo</s2><s3>NOR</s3><sZ>5 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>Norvège</country><placeName><settlement type="city">Oslo</settlement><region nuts="2">Østlandet</region></placeName></affiliation></author><author><name sortKey="Alestr M, Peter" sort="Alestr M, Peter" uniqKey="Alestr M P" first="Peter" last="Alestr M">Peter Alestr M</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Dept. of Basic Sciences and Aquatic Medicine, Norwegian School of Veterinary Science, POB 8146 Dep.</s1><s2>0033 Oslo</s2><s3>NOR</s3><sZ>1 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Norvège</country><placeName><settlement type="city">Oslo</settlement><region nuts="2">Østlandet</region></placeName></affiliation></author><author><name sortKey="Aleksandersen, Mona" sort="Aleksandersen, Mona" uniqKey="Aleksandersen M" first="Mona" last="Aleksandersen">Mona Aleksandersen</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Dept. of Basic Sciences and Aquatic Medicine, Norwegian School of Veterinary Science, POB 8146 Dep.</s1><s2>0033 Oslo</s2><s3>NOR</s3><sZ>1 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>Norvège</country><placeName><settlement type="city">Oslo</settlement><region nuts="2">Østlandet</region></placeName></affiliation></author><author><name sortKey="Ropstad, Erik" sort="Ropstad, Erik" uniqKey="Ropstad E" first="Erik" last="Ropstad">Erik Ropstad</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Dept. of Production Animal Clinical Sciences, Norwegian School of Veterinary Science, POB 8146 Dep.</s1><s2>0033 Oslo</s2><s3>NOR</s3><sZ>5 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>Norvège</country><placeName><settlement type="city">Oslo</settlement><region nuts="2">Østlandet</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Aquatic toxicology</title><title level="j" type="abbreviated">Aquat. toxicol.</title><idno type="ISSN">0166-445X</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Aquatic toxicology</title><title level="j" type="abbreviated">Aquat. toxicol.</title><idno type="ISSN">0166-445X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aquatic environment</term><term>Brachydanio rerio</term><term>Ecotoxicology</term><term>Female</term><term>Hepatocyte</term><term>Liver</term><term>Oocyte</term><term>Ovary</term><term>Persistent organic pollutant</term><term>Proliferation</term><term>Toxicity</term><term>Vitellogenin</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Foie</term><term>Vitellogénine</term><term>Hépatocyte</term><term>Prolifération</term><term>Femelle</term><term>Ovaire</term><term>Ovocyte</term><term>Milieu aquatique</term><term>Ecotoxicologie</term><term>Toxicité</term><term>Polluant organique persistant</term><term>Brachydanio rerio</term><term>Danio rerio</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Milieu aquatique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Persistent organic pollutants such as polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and dichlorodiphenyltrichloroethane (DDT) are present in high concentrations in livers of burbot (Lota lota) in Lake Mjøsa, Norway. In order to assess effects of such pollutants on fish gonadal morphology, female zebrafish were exposed in two generations by food to mixtures of pollutants extracted from livers of burbot from Lake Mjøsa (high and low dose) and Lake Losna, which represents background pollution, and compared to a control group. Ovarian follicle counts detected a significant decrease in late vitellogenic follicle stages in fish exposed to the Losna and the high concentrations of Mjøsa mixtures in fish from the first generation. In addition, proliferation of granulosa cells, visualized by immunohistochemistry against proliferating cell nuclear antigen (PCNA), was decreased in all exposure groups in either early or late vitellogenic follicle stages compared to control. This was accompanied by increased apoptosis of granulosa cells. There was a decrease in proliferation of liver hepatocytes with exposure to both Mjøsa mixtures. In addition, immunopositivity for vitellogenin in the liver was significantly lower in the Mjøsa high group than in the control group. When analysing effects of parental exposure, fish with parents exposed to Mjøsa high mixture had significantly higher numbers of perinucleolar follicles than fish with control parents. We conclude that long-term exposure of a real-life mixture of pollutants containing high- and background levels of chemicals supress ovarian follicle development, liver vitellogenin immunostaining intensity and hepatocyte proliferation in the zebrafish model.</div></front></TEI><affiliations><list><country><li>Norvège</li></country><region><li>Østlandet</li></region><settlement><li>Oslo</li></settlement></list><tree><country name="Norvège"><region name="Østlandet"><name sortKey="Kraugerud, Marianne" sort="Kraugerud, Marianne" uniqKey="Kraugerud M" first="Marianne" last="Kraugerud">Marianne Kraugerud</name></region><name sortKey="Aleksandersen, Mona" sort="Aleksandersen, Mona" uniqKey="Aleksandersen M" first="Mona" last="Aleksandersen">Mona Aleksandersen</name><name sortKey="Alestr M, Peter" sort="Alestr M, Peter" uniqKey="Alestr M P" first="Peter" last="Alestr M">Peter Alestr M</name><name sortKey="Berg, Vidar" sort="Berg, Vidar" uniqKey="Berg V" first="Vidar" last="Berg">Vidar Berg</name><name sortKey="Doughty, Richard William" sort="Doughty, Richard William" uniqKey="Doughty R" first="Richard William" last="Doughty">Richard William Doughty</name><name sortKey="Lyche, Jan L" sort="Lyche, Jan L" uniqKey="Lyche J" first="Jan L." last="Lyche">Jan L. Lyche</name><name sortKey="Ropstad, Erik" sort="Ropstad, Erik" uniqKey="Ropstad E" first="Erik" last="Ropstad">Erik Ropstad</name><name sortKey="Tremoen, Nina H" sort="Tremoen, Nina H" uniqKey="Tremoen N" first="Nina H." last="Tremoen">Nina H. Tremoen</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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