6533b7cefe1ef96bd1257bce
RESEARCH PRODUCT
Metallothionein in the freshwater gastropod Melanopsis dufouri chronically exposed to cadmium: A methodological approach
Maria João BebiannoJose Del RamoRocío UreñaAmparo Torreblancasubject
Health Toxicology and MutagenesisSnailsMelanopsischemistry.chemical_elementChemicalFreshwater snailAquatic organismsWater pollutantsMetallothioneinAnimalsChronicToxicity Tests ChronicCadmiumbiologyWater pollutantsPublic Health Environmental and Occupational HealthAquatic animalGeneral Medicinebiology.organism_classificationPollutionUltrafiltration (renal)BiochemistrychemistryEnvironmental chemistryMetallothioneinToxicity testsWater Pollutants ChemicalCadmiumdescription
Previous studies have demonstrated that the use of differential pulse polarography (DPP) for metallothionein (MT) determination in marine gastropod tissues, particularly the digestive gland, requires taking into account the presence of heat-stable high molecular weight compounds that exhibit polarographic signal. In the present paper, similar compounds were identified in tissues from the freshwater snail Melanopsis dufouri which also interfere with MT determination by DPP and, due to their silver binding capacity, also interfere in the silver assay for MT quantification. Ultrafiltration seems to be effective in removing these high molecular weight compounds from heat-denatured homogenate supernatant allowing direct MT quantification by DPP. A fully validated procedure for metallothionein determination in M. dufouri is described. In spite of a considerable accumulation of cadmium in the visceral complex of M. dufouri following exposure to 100 microg CdL(-1) for 8 weeks (up to 37 microgg(-1)) only a small increase in MT concentration was found. info:eu-repo/semantics/publishedVersion
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-01-01 |