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Titolo:
HEAVY-METAL INTRACELLULAR BALANCE AND RELATIONSHIP WITH METALLOTHIONEIN INDUCTION IN THE GILLS OF CARP - AFTER CONTAMINATION BY AG, CD, ANDHG FOLLOWING PRETREATMENT WITH ZN OR NOT
Autore:
COSSON RP;
Indirizzi:
FAC PHARM NANTES,SERV ECOTOXICOL,CNRS,URA 1356,1 RUE GASTON VEIL F-44035 NANTES FRANCE
Titolo Testata:
Biological trace element research
fascicolo: 3, volume: 46, anno: 1994,
pagine: 229 - 245
SICI:
0163-4984(1994)46:3<229:HIBARW>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
FRESH-WATER FISH; FUNDULUS-HETEROCLITUS; SALMO-GAIRDNERI; RAINBOW-TROUT; CADMIUM; MERCURY; ZINC; ACCLIMATION; EXPOSURE; BINDING;
Keywords:
HEAVY METALS; METALLOTHIONEIN INDUCIBILITY; FISH GILL; SUBCELLULAR ION BALANCE; ZINC PRETREATMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
R.P. Cosson, "HEAVY-METAL INTRACELLULAR BALANCE AND RELATIONSHIP WITH METALLOTHIONEIN INDUCTION IN THE GILLS OF CARP - AFTER CONTAMINATION BY AG, CD, ANDHG FOLLOWING PRETREATMENT WITH ZN OR NOT", Biological trace element research, 46(3), 1994, pp. 229-245

Abstract

Determination of metal levels (Cu, Zn, Cd, Ag, Hg) in soluble and insoluble fractions of gill homogenates has been performed after 7 d exposure of carp (Cyprinus carpio) to moderate concentrations of Cd, Ag, and Hg in water. Metallothionein levels have been quantified by polarographic method before and after contamination and a subsequent decontamination phase (7 d). The influence of pretreatment by zinc (7 d) has also been evaluated. Metallothionein level variations have been interpreted as having regard to interrelated flows of metal between subcellular fractions. Special interest has been focused on heat-stable compound (HSC)-bound heavy metal flows within the cytosol, taking in account that MT is the major component of these ligands. Our data showed differences between the ability of metals to bind cytosolic ligands and HSCs, and their respective potency for MT induction in gill. Regardless of pretreatment, mercury gave the highest increase of gill MT, and after the decontamination MT level remained high compared to control. Cadmium and silver gave similar increases, but a significant difference with control appeared only after the decontamination step with silver, whereas 1 week of contamination was enough for cadmium. Our experimental conditions gave the following order of potency for MT induction in gill: Hg >> Cd > Ag > Zn.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 22:37:21