Effects of PCBs sorbed to algal paste and sediments on the stress protein response (HSP70 family) in the eastern oyster, Crassostrea virginica.

Cruz-Rodríguez LA, Baucum AJ, Soudant P, Chu FL, Hale RC
Mar Environ Res. 2000 50 (1-5): 341-5

PMID: 11460715 · DOI:10.1016/s0141-1136(00)00079-9

This study examined the stress protein response (HSP70 family) of reproductively inactive oysters fed 0.7 g algal paste containing 0, 0.35 and 3.5 micrograms polychlorinated biphenyls (PCBs) daily. A second set of treatment groups investigated the combined effect of PCBs and sediments (0.3 g sediments daily per oyster) on HSP70 response. After 8 weeks of PCB exposure, oyster tissues (mantle and gill) were sampled and analyzed for HSP70. Preliminary results did not show a significant effect in HSP70 response in oysters fed PCB sorbed to algal paste, albeit PCBs accumulated up to 1342 ng/g dry weight in the mantle, and up to 180 ng/g dry weight in gill tissues. However, the addition of sediments caused a significant increase in HSP70 levels of gills and mantle, although the mantle was less sensitive to the sediments.

MeSH Terms (8)

Animals Eukaryota Geologic Sediments Gills HSP70 Heat-Shock Proteins Ostreidae Polychlorinated Biphenyls Water Pollutants, Chemical

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