Synthesis of stress proteins under normal and heat shock conditions in gill tissue of sea mussels (Mytilus edulis) after chronic exposure to cadmium |
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| Institution: | 1. Fishery Engineering Department, Santa Catarina State University, Laguna 88790-000, Brazil;2. Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry, Federal University of Santa Catarina, Florianópolis 88034-257, Brazil;3. Aquaculture Pathology Research Center, Federal University of Santa Catarina, Florianópolis 88034-257, Brazil;4. Animal and Food Production Department, Santa Catarina State University, Lages 88520-000, Brazil;5. Department of Natural Sciences, Regional University of Blumenau, Blumenau 89012-170, Brazil;6. Oceanography and Limnology Department, Federal University of Maranhão, São Luís 65080-805, Brazil;7. Laboratory of Marine Mollusks, Federal University of Santa Catarina, Florianópolis 88034-257, Brazil;8. Department of Scientific and Technological Education, Santa Catarina State University, Florianópolis 88035-001, Brazil |
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| Abstract: | 1. Sea mussels were exposed to 16.5 μg Cd/l under semi-field conditions for almost one year. The isolated gills were incubated with 35S-methionine or -cysteine.2. Chronic exposure to cadmium neither altered the rate of amino acid incorporation nor induced expression of heat shock proteins in the gills.3. Heat shock imposed after chronic exposure to cadmium resulted in an increased synthesis of heat shock proteins, especially those of high molecular weight.4. Synthesis of cadium-bincling, low molecular weight proteins was observed at any point of the exposure time. Their cadmium-bincling capacity and rate of synthesis, after the initial increase, remained unchanged throughout the exposure. |
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