Action of 1,25-dihydroxyvitamin d3 on calcium metabolism in the crustacean Orchestia cavimana during the molt cycle |
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| Affiliation: | 1. Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling FK9 4LA, UK;2. Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK;3. BioMar AS, Havnegata 9, 7010 Trondheim, Norway;4. Hydrobiology Department, Veterinary Research Institute, National Research Centre, Giza, Egypt;5. Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, Guangdong, China;1. Aquaculture and Fisheries Group, Department of Animal Science, Wageningen University and Research, Wageningen, Netherlands;2. Feed and Nutrition Research group, Institute of Marine Research, Bergen, Norway;1. DSM Nutritional Products, Wurmisweg 576, Kaiseraugst, Switzerland;2. Faculty of Biosciences and Aquaculture, Nord University, Bodø, Norway;3. Research Centre for Animal Nutrition & Health, DSM Nutritional Products, 1 Boulevard d''Alsace, Village-Neuf, France;4. Clinical Laboratory, Department for Clinical Diagnostics and Services, Vetsuisse Faculty Zürich, University of Zurich, Switzerland;5. Institute for Fish and Wildlife Health, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty Bern, University of Bern, Switzerland |
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| Abstract: | - 1.1. The possible involvement of vitamin D3 in the calcium metabolism of the terrestrial crustacean Orchestia during the molt cycle was further investigated by measuring the effects of administration of exogenous 1,25 (OH)2D3 on three parameters of the calcium balance in two different compartments of the body.
- 2.2. At the hemolymph level, a strong hypocalcémie effect was observed in intermolt and early premolt. Within the posterior caeca of the midgut, stimulation of calcium storage and calcium release were noticed during a short period surrounding the time of exuviation, with concomitant variations of the epithelial carbonic anhydrase activity.
- 3.3. These results, together with other data, are discussed to determine the possible functions of vitamin D3, or related molecules, in the calcium turnover within the different compartments of the body, according to the successive stages of the molt cycle.
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