| Intestinal zinc uptake in two marine teleosts, squirrelfish (Holocentrus adscensionis) and gulf toadfish (Opsanus beta). | |
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MedLine Citation:
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PMID: 12905118 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Zinc is a vital micronutrient, yet as an environmental toxicant it can be deleterious to aquatic organisms such as fish. Consequently, the study of zinc uptake mechanisms is essential for understanding nutrition, toxicity, and metabolism of this metal. Intestinal zinc uptake was studied in two marine teleosts, using both in vitro (in vitro perfusion and intestinal sacs) and in vivo techniques (in situ bolus). Female squirrelfish (Holocentrus adscensionis) exhibited significantly increased epithelial zinc uptake associated with enhanced hepatic zinc accumulation. This confirms this zinc-hyperaccumulating teleost as a potential model of zinc absorption. Intestinal zinc uptake in the gulf toadfish (Opsanus beta) was biphasic with respect to zinc concentration (0.3-500 microM), exhibiting both saturable and passive uptake components. In both species, the passage of zinc into the postintestinal compartment was highly dependent on technique. Decreased proportions of postintestinal zinc in vivo, coupled with concentration-dependent distribution of zinc accumulation, suggested mechanisms may act to control the movement of zinc into the circulation. In addition, the results of this study were used to reinterpret previous findings of zinc uptake in freshwater fish and allowed a critique of techniques used to study intestinal metal uptake. |
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Authors:
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Chris N Glover; Sara Balesaria; Gregory D Mayer; E David Thompson; Patrick J Walsh; Christer Hogstrand |
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Publication Detail:
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Type: Comparative Study; In Vitro; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Physiological and biochemical zoology : PBZ Volume: 76 ISSN: 1522-2152 ISO Abbreviation: Physiol. Biochem. Zool. Publication Date: 2003 May-Jun |
Date Detail:
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Created Date: 2003-08-07 Completed Date: 2003-10-29 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 100883369 Medline TA: Physiol Biochem Zool Country: United States |
Other Details:
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Languages: eng Pagination: 321-30 Citation Subset: IM |
Affiliation:
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Division of Life Sciences, King's College, London, 150 Stamford Street, London SE1 9NN, United Kingdom. gloverc@mcmaster.ca |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Batrachoidiformes / metabolism*, physiology Female Florida Intestinal Absorption / physiology* Oceans and Seas Zinc / pharmacokinetics* |
| Grant Support | |
ID/Acronym/Agency:
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ES05075/ES/NIEHS NIH HHS |
| Chemical | |
Reg. No./Substance:
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7440-66-6/Zinc |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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