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RESEARCH PRODUCT
Manganese overload affects p38 MAPK phosphorylation and metalloproteinase activity during sea urchin embryonic development.
Annalisa PinsinoValeria MatrangaMaria Carmela Roccherisubject
MAPK/ERK pathwayEmbryo NonmammalianAquatic ScienceBiologyMatrix metalloproteinaseOceanographyp38 Mitogen-Activated Protein KinasesParacentrotus lividusbiology.animalECM ERK Embryo-toxicity Immunoblotting MAPK MMPs Marine organisms' calcification Mn SDS-PAGE Zymography extracellular matrix extracellular signal-regulated kinase manganese metalloproteinases mitogen-activated protein kinase p38 MAPK sodium dodecyl sulfate-polyacrylamide gel electrophoresisAnimalsSettore BIO/06 - Anatomia Comparata E CitologiaPhosphorylationProtein kinase ASea urchinManganeseKinaseGeneral Medicinebiology.organism_classificationPollutionMatrix MetalloproteinasesBiochemistryMitogen-activated protein kinasebiology.proteinParacentrotusPhosphorylationWater Pollutants Chemicaldescription
Abstract In the marine environment, manganese represents a potential emerging contaminant, resulting from an increased production of manganese-containing compounds. In earlier reports we found that the exposure of Paracentrotus lividus sea urchin embryos to manganese produced phenotypes with no skeleton. In addition, manganese interfered with calcium uptake, perturbed extracellular signal-regulated kinase (ERK) signaling, affected the expression of skeletogenic genes, and caused an increase of the hsc70 and hsc60 protein levels. Here, we extended our studies focusing on the temporal activation of the p38 mitogen-activated protein kinase (p38 MAPK) and the proteolytic activity of metalloproteinases (MMPs). We found that manganese affects the stage-dependent dynamics of p38 MAPK activation and inhibits the total gelatin-auto-cleaving activity of MMPs, with the exclusion of the 90–85 kDa and 68–58 kDa MMPs, whose levels remain high all throughout development. Our findings correlate, for the first time to our knowledge, an altered activation pattern of the p38 MAPK with an aberrant MMP proteolytic activity in the sea urchin embryo.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-02-01 | Marine environmental research |