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Spatial variations in biomarkers of Mytilus edulis mussels at four polluted regions spanning the Northern Hemisphere

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Title: Spatial variations in biomarkers of Mytilus edulis mussels at four polluted regions spanning the Northern Hemisphere
Authors: Gagné, F.1 francois.gagne@ec.gc.ca, Burgeot, T.2, Hellou, J.3, St-Jean, S.4, Farcy, É.2, Blaise, C.1
Source: Environmental Research. Jun2008, Vol. 107 Issue 2, p201-217. 17p.
Subjects: Economic development & the environment, Environmental health, Social development, Climate change, Mytilus edulis, Water pollution
Abstract: Abstract: Economic and social developments have taken place at the expense of the health of the environment, both locally and on a global scale. In an attempt to better understand the large-scale effects of pollution and other stressors like climate change on the health status of Mytilus edulis, mussels were collected during the first two weeks of June 2005 at three sites (one pristine and two affected by pollution) located in each of the regions of the Canadian West Coast, the St. Lawrence estuary, the Atlantic East Coast and the northwestern coast of France, covering a total distance of some 11000km. The mussels were analyzed for morphologic integrity (condition factor), gametogenic activity (gonado-somatic and gonad maturation index, vitellogenin(Vtg)-like proteins), energy status (temperature-dependent mitochondrial electron transport activity and gonad lipid stores), defense mechanisms (glutathione S-transferase, metallothioneins, cytochrome P4503A activity and xanthine oxidoreductase-XOR), and tissue damage (lipid peroxidation-LPO and DNA strand breaks). The results showed that data from the reference sites in each region were usually not normally distributed, with discriminant factors reaching the number of regions (i.e. four), except for the biomarkers gonadal lipids, XOR and LPO in digestive gland. The integrated responses of the biomarkers revealed that biomarkers of stress were significantly more pronounced in mussels from the Seine estuary, suggesting that the impacts of pollution are more generalized in this area. Mussels from the Seine estuary and the Atlantic East Coast (Halifax Harbor) responded more strongly for Vtg-like proteins, but was not related to gonad maturation and gonado-somatic indexes, suggesting the presence of environmental estrogens. Moreover, these mussels displayed reduced DNA repair activity and increased LPO. Factorial analyses revealed that energy status, cytochrome P4503A activity and Vtg-like proteins were the most important biomarkers. Adaptation to warmer temperatures was reflected at the energy status levels, mussels from both the polluted and warmer sites displaying increased ratios of mitochondrial activity to lipid stores. Regional observations of biomarkers of energy status, gametogenesis and pollutant-related effects were influenced by nutrition, oxygen availability (eutrophication), and thermal history. [Copyright &y& Elsevier]
Copyright of Environmental Research is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Spatial variations in biomarkers of Mytilus edulis mussels at four polluted regions spanning the Northern Hemisphere
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  Data: <searchLink fieldCode="AR" term="%22Gagné%2C+F%2E%22">Gagné, F.</searchLink><relatesTo>1</relatesTo><i> francois.gagne@ec.gc.ca</i><br /><searchLink fieldCode="AR" term="%22Burgeot%2C+T%2E%22">Burgeot, T.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Hellou%2C+J%2E%22">Hellou, J.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22St-Jean%2C+S%2E%22">St-Jean, S.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Farcy%2C+É%2E%22">Farcy, É.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Blaise%2C+C%2E%22">Blaise, C.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Research%22">Environmental Research</searchLink>. Jun2008, Vol. 107 Issue 2, p201-217. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Economic+development+%26+the+environment%22">Economic development & the environment</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+health%22">Environmental health</searchLink><br /><searchLink fieldCode="DE" term="%22Social+development%22">Social development</searchLink><br /><searchLink fieldCode="DE" term="%22Climate+change%22">Climate change</searchLink><br /><searchLink fieldCode="DE" term="%22Mytilus+edulis%22">Mytilus edulis</searchLink><br /><searchLink fieldCode="DE" term="%22Water+pollution%22">Water pollution</searchLink>
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  Data: Abstract: Economic and social developments have taken place at the expense of the health of the environment, both locally and on a global scale. In an attempt to better understand the large-scale effects of pollution and other stressors like climate change on the health status of Mytilus edulis, mussels were collected during the first two weeks of June 2005 at three sites (one pristine and two affected by pollution) located in each of the regions of the Canadian West Coast, the St. Lawrence estuary, the Atlantic East Coast and the northwestern coast of France, covering a total distance of some 11000km. The mussels were analyzed for morphologic integrity (condition factor), gametogenic activity (gonado-somatic and gonad maturation index, vitellogenin(Vtg)-like proteins), energy status (temperature-dependent mitochondrial electron transport activity and gonad lipid stores), defense mechanisms (glutathione S-transferase, metallothioneins, cytochrome P4503A activity and xanthine oxidoreductase-XOR), and tissue damage (lipid peroxidation-LPO and DNA strand breaks). The results showed that data from the reference sites in each region were usually not normally distributed, with discriminant factors reaching the number of regions (i.e. four), except for the biomarkers gonadal lipids, XOR and LPO in digestive gland. The integrated responses of the biomarkers revealed that biomarkers of stress were significantly more pronounced in mussels from the Seine estuary, suggesting that the impacts of pollution are more generalized in this area. Mussels from the Seine estuary and the Atlantic East Coast (Halifax Harbor) responded more strongly for Vtg-like proteins, but was not related to gonad maturation and gonado-somatic indexes, suggesting the presence of environmental estrogens. Moreover, these mussels displayed reduced DNA repair activity and increased LPO. Factorial analyses revealed that energy status, cytochrome P4503A activity and Vtg-like proteins were the most important biomarkers. Adaptation to warmer temperatures was reflected at the energy status levels, mussels from both the polluted and warmer sites displaying increased ratios of mitochondrial activity to lipid stores. Regional observations of biomarkers of energy status, gametogenesis and pollutant-related effects were influenced by nutrition, oxygen availability (eutrophication), and thermal history. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Environmental Research is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.envres.2007.09.013
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      – SubjectFull: Mytilus edulis
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      – SubjectFull: Water pollution
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      – TitleFull: Spatial variations in biomarkers of Mytilus edulis mussels at four polluted regions spanning the Northern Hemisphere
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              Text: Jun2008
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