Uptake of mercury by the gills of the fresh water chinese crab Eriocheir sinensis (Milne-Edwards) |
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| Institution: | 1. Centre d''Ecologie et Physiologie Energétiques, Centre National de la Recherche Scientifique, 23, rue Becquerel, F-67087 Strasbourg, France;2. Laboratoire de Physiologie Animale, Université de Liège, 22, Quai Van Beneden, 6-4020 Liège, Belgique;1. Department of Basic Medical Sciences, Neyshabur University of Medical Sciences, Neyshabur, Iran;2. Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran;3. Department of Immunogenetics, BuAli Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran;4. Department of Neurosurgery, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran;1. School of Chemistry and Life Science, Changchun University of Technology, NO. 2055, Yanan Street, Changchun, 130012, PR China;2. Advanced Institute of Materials Science, Changchun University of Technology, NO. 2055, Yanan Street, Changchun, 130012, PR China;3. Jilin Provincial Key Laboratory of Carbon Fiber Development and Application, School of Chemistry and Life Science, Changchun University of Technology, NO. 2055, Yanan Street, Changchun, 130012, PR China;1. Department of Companion Animal Clinical Sciences, Norwegian University of Life Sciences – School of Veterinary Science, P.O. Box 369 Sentrum, N-0102, Oslo, Norway;2. Department of Clinical Sciences, Swedish University of Agricultural Sciences, P.O. Box 7054, SE-750 07, Uppsala, Sweden;3. Department of Food Safety and Infection Biology, Norwegian University of Life Sciences – School of Veterinary Science, P.O. Box 369 Sentrum, N-0102, Oslo, Norway;4. Norwegian Medicines Agency, P.O. Box 240 Skøyen, N-0213, Oslo, Norway;1. Laboratory of Anatomic Pathology and Histology, Université de Toulouse, Ecole Nationale Vétérinaire de Toulouse (ENVT), Toulouse, France;2. Wildlife Care Centre, Université de Toulouse, ENVT, Toulouse, France;3. Interactions Hôtes-Agents Pathogènes, Université de Toulouse, National Research Institute for Food, Agriculture and the Environment (INRAE), ENVT, Toulouse, France;1. National Research Center ‘Kurchatov Institute’, 123182 Moscow, Russian Federation;2. N. S. Enikolopov Institute of Synthetic Polymeric Materials, Russian Academy of Sciences, 117393 Moscow, Russian Federation;3. A. V. Shubnikov Institute of Crystallography, Federal Research Center ‘Crystallography and Photonics’, Russian Academy of Sciences, 119333 Moscow, Russian Federation;1. Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture, Shanghai Engineering Research Center of Agriculture, Shanghai Ocean University, 999 Huchenghuan Road, Lingang NewDistrict, Shanghai 201306, China;2. Xichang College, Xichang 415000, Sichuan Province, China |
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| Abstract: | An in vitro perfused preparation of gills isolated from the euryhaline Chinese crab Eriocheir sinensis has been used to investigate the uptake of mercury. The results show that mercury crosses the epithelio-cuticular complex of the anterior respiratory gills and of the posterior salt-transporting gills. Mercury passes down its concentration gradient and it may reasonably be concluded that the heavy metal enters the crab via diffusion. However, the mercury influx through the epithelio-cuticular complex is significantly increased when the concentration gradient of mercury is nullified by the addition of mercury to the internal perfusion medium. A mechanism such as exchange-diffusion could then be involved in the transepithelial movements of mercury in crab gills, but this remains a matter of speculation. It is also demonstrated that the metabolic inhibitor 2,4-dinitrophenol, applied in the perfusion medium, drastically and immediately inhibits the influx of mercury through the anterior gills, substantiating the idea that a mechanism requiring metabolic energy is involved in the transepithelial movements of mercury. The nature of the non-diffusional component of mercury transport remains a matter of controversy. |
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