Abstract
The 75Se internal bioavailability was investigated in microalgae, mussels and rats as biological experimental models. The 75Se accumulation from freshwater to microalgae [Scenedesmus obliquus (Turpin) Kützing], from freshwater to mussels (Unio mancus Lamark) and, finally, per os to rats (Rattus norvegicus Berkenhout) was followed using 75Se-labelled selenite looking at 75Se uptake, retention, intracellular distribution and binding with cellular biocomplexes. After exposure to 10, 50 and 500 μg Se L−1, the microalgae showed an inhibitory effect on population growth only at the highest concentration. Mussels exposed to 105 μg Se L−1 showed an accumulation of the element with time in all tissues. Intracellularly, Se was present in all subcellular fractions, especially in the cytosol. Rats were treated via oral administration with 5 μg Se rat−1. After 24 h, liver and kidney showed the highest Se concentration.
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Authors thank Mr. G. Tettamanti (Ascom, Milan) for the technical support.
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Polettini, AE., Fortaner, S., Farina, M. et al. Uptake from Water, Internal Distribution and Bioaccumulation of Selenium in Scenedesmus obliquus, Unio mancus and Rattus norvegicus: Part A. Bull Environ Contam Toxicol 94, 84–89 (2015). https://doi.org/10.1007/s00128-014-1407-2
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DOI: https://doi.org/10.1007/s00128-014-1407-2