Effect of ligands and other metals on the uptake of mercury and methylmercury across the gills and the intestine of the blue crab (Callinectes sapidus)
| Autor: | Robert P. Mason, Sandrine Andres, Jean-Michel Laporte |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Gills
Male Gill Callinectes Brachyura Physiology Health Toxicology and Mutagenesis chemistry.chemical_element In Vitro Techniques Ligands Toxicology Biochemistry Arsenic Metal Selenium chemistry.chemical_compound Animals Tissue Distribution Intestinal Mucosa Methylmercury Dose-Response Relationship Drug biology Facilitated diffusion Chemistry Ecology Mercury Cell Biology General Medicine Methylmercury Compounds biology.organism_classification Mercury (element) Perfusion Zinc Lead Bioaccumulation visual_art Environmental chemistry visual_art.visual_art_medium Metalloid Water Pollutants Chemical Cadmium |
| Zdroj: | Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology. 131:185-196 |
| ISSN: | 1532-0456 |
| DOI: | 10.1016/s1532-0456(01)00289-7 |
| Popis: | Using the perfusion method, we compared the accumulation and flux of inorganic mercury (Hg) and methylmercury (CH3Hg) across the gills and intestine of the blue crab, Callinectes sapidus. The accumulation and transfer processes were studied for each form by exposing the organs in the presence of specific ligands and other metals. While binding of Hg and CH3Hg to organic ligands reduced the rate of uptake in most instances, the differences in accumulation could not be explained only in terms of passive diffusive uptake. Thus, it appears that Hg and CH3Hg accumulation is dominated by ligand exchange or facilitated transport processes. Exposure of the gills and intestine in the presence of a suite of metals and metalloids showed that inorganic Hg and CH3Hg uptake was largely by different mechanisms to that of the other elements, as there was little interaction in terms of uptake rate. Overall, the results of this study suggest that inorganic Hg and CH3Hg uptake into the gills and intestine of this invertebrate is by a variety of pathways, both active and passive. |
| Databáze: | OpenAIRE |
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