Cytotoxic effects of cadmium in mammary epithelial cells: Protective role of the macrocycle [15]pyN5

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Cytotoxic effects of cadmium in mammary epithelial cells: Protective role of the macrocycle [15]pyN5

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dc.contributor.author Gonçalves, S.
dc.contributor.author Fernandes, A. S.
dc.contributor.author Oliveira, N. G.
dc.contributor.author Marques, J.
dc.contributor.author Costa, J.
dc.contributor.author Cabral, M. F.
dc.contributor.author Miranda, J.
dc.contributor.author Cipriano, M.
dc.contributor.author Guerreiro, P. S.
dc.contributor.author Castro, M.
dc.date.accessioned 2014-10-05T17:56:02Z
dc.date.available 2014-10-05T17:56:02Z
dc.date.issued 2012-06
dc.identifier.uri http://hdl.handle.net/10437/5632
dc.description.abstract Human exposure to cadmium (Cd) occurs via different routes, including diet. The increasing amount of data linking Cd with different cellular effects in the mammary gland justifies additional toxicological assessments using human mammary epithelial cells. This work aimed therefore to assess the cytotoxic effects of Cd in MCF10A cells and to characterize the cytoprotective role of the macrocycle [15]pyN5 in the form of calcium salt. Cadmium chloride revealed to be cytotoxic to MCF10A cells, decreasing cell viability and proliferation in a concentration-dependent manner. Comparable dose–response curves and IC50 values (57–63 μM, 24 h treatment) were obtained using the MTT reduction, crystal violet and BrdU assays. In terms of reactive oxygen species formation, only a slight increase in superoxide radical anion was observed at very high Cd concentrations (⩾100 μM). Chelation should thus constitute the primary strategy to mitigate the cytotoxic effects induced by Cd in mammary cells. In this context, [15]pyN5 which presents appropriate chemical and thermodynamic features was studied as a Cd chelator. This macrocycle (25 and 50 μM) significantly reduced or even abolished Cd-induced cytotoxicity. Protective effects were observed in terms of cell viability, cell proliferation and morphological alterations, being the protection mostly attributed to a chelating-based mechanism. pt
dc.format application/pdf
dc.language.iso eng pt
dc.publisher Food and Chemical Toxicology pt
dc.rights openAccess
dc.subject CADMIUM pt
dc.subject BREAST pt
dc.subject CYTOTOXICITY pt
dc.subject CHELATION THERAPY pt
dc.subject MACROCYCLE pt
dc.title Cytotoxic effects of cadmium in mammary epithelial cells: Protective role of the macrocycle [15]pyN5 pt
dc.type article pt


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