6533b7dcfe1ef96bd1272941
RESEARCH PRODUCT
Nickel, lead, and cadmium induce differential cellular responses in sea urchin embryos by activating the synthesis of different HSP70s.
Giovanni GiudiceGuiseppina TurturiciRosalia SavonaFabiana GeraciGabriella SconzoAnnalisa Pinsinosubject
animal structuresEmbryo NonmammalianBiophysicschemistry.chemical_elementBiochemistryParacentrotus lividusstress HSP70 embryo modelMethionineNickelMetals HeavyBotanyAnimalsHSP70 Heat-Shock ProteinsPluteusMolecular BiologyCadmiumbiologyMolecular massEmbryoCell BiologyGastrulaBlastulabiology.organism_classificationCell biologyHsp70GastrulationKineticschemistryLeadSea Urchinsembryonic structuresCadmiumdescription
Treatment with heavy metals, such as nickel, lead or cadmium, elicits different cellular stress responses according to the metal used and the length of treatment. In Paracentrotus lividus embryos the inducible forms of HSP70 (HSP70/72) are different in molecular mass from the constitutively expressed HSP75, and they can be used as markers of cellular stress. Even a short treatment with each metal induces the synthesis of HSP70/72 which remain stable for at least 20 h and differ little in their isoelectric points. Continuous treatment from fertilization with nickel or lead produces late irregular pluteus embryos, with peak HSP70/72 synthesis at blastula followed by the arrest of synthesis by pluteus. On the contrary, the same treatment with cadmium induces continuous HSP70/72 synthesis and produces irregular gastrula embryos which then degenerate. Moreover, a long treatment induces over control embryos a slight increase in the amount of constitutive HSP75 during development while lead treatment depresses constitutive HSP75 at early stages and doubles its quantity at late stages.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-07-29 | Biochemical and biophysical research communications |