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AMP-activated protein kinase is a biomarker of energetic status in freshwater mussels exposed to municipal effluents.
Goodchild, Christopher G; Frederich, Markus; Zeeman, Stephan I.
Afiliação
  • Goodchild CG; Department of Marine Sciences, University of New England, 11 Hills Beach Rd., Biddeford, ME 04005, USA; Department of Integrative Biology, Oklahoma State University, 501 Life Sciences West, Stillwater, OK 74078, USA. Electronic address: christopher.goodchild@okstate.edu.
  • Frederich M; Department of Marine Sciences, University of New England, 11 Hills Beach Rd., Biddeford, ME 04005, USA. Electronic address: mfrederich@une.edu.
  • Zeeman SI; Department of Marine Sciences, University of New England, 11 Hills Beach Rd., Biddeford, ME 04005, USA. Electronic address: szeeman@une.edu.
Sci Total Environ ; 512-513: 201-209, 2015 Apr 15.
Article em En | MEDLINE | ID: mdl-25622267
Although biomarkers are frequently used to assess sublethal effects of contaminants, a lack of mechanistic linkages to higher-level effects limits the predictive power of biomarkers. Bioenergetics has been proposed as a framework for linking cellular effects to whole-animal effects. We investigated sublethal effects of exposure to wastewater treatment facility effluent in freshwater mussels in situ, thereby capturing ecologically relevant exposure conditions. Our study focused on the energetic biomarker AMP-activated protein kinase (AMPK), while also considering more traditional biomarkers like heat shock proteins (HSP70), and antioxidant enzymes (i.e., superoxide dismutase (SOD), glutathione-S-transferase (GST)). We examined biomarkers at mRNA and protein levels. Effluent exposure caused a reduction in total-AMPK protein abundance (p=0.05) and AMPK mRNA expression (p=0.02). Conversely, AMPK activity increased at downstream sites by 2.2-fold (p=0.05), indicating increased cellular energy consumption. HSP70 protein abundance was lower at downstream sites (p<0.05), while SOD and GST activity levels significantly increased. By using various biomarkers, we demonstrate that exposure to municipal effluent creates an energetically taxing situation. This is the first study to use AMPK to evaluate the effects of contamination in situ, and our results suggest that energetic biomarkers, like AMPK, complement traditional biomarkers and may help establish functional links between cellular and whole-animal effects.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Monitoramento Ambiental / Bivalves / Proteínas Quinases Ativadas por AMP Tipo de estudo: Prognostic_studies Limite: Animals Idioma: En Ano de publicação: 2015 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Monitoramento Ambiental / Bivalves / Proteínas Quinases Ativadas por AMP Tipo de estudo: Prognostic_studies Limite: Animals Idioma: En Ano de publicação: 2015 Tipo de documento: Article