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• W2006971133 abstract "It was previously demonstrated that [Pt(O,O′-acac)(γ-acac)(DMS)] exerted toxic effects at high doses, whilst sub-cytotoxic concentrations induced anoikis and decreased cell migration. Aim of this study was to investigate the hypothesis that [Pt(O,O′-acac)(γ-acac)(DMS)] alters the [Ca2+]i and that this is linked to its ability to trigger rapid apoptosis in MCF-7 cells. Thus, cells were treated with [Pt(O,O′-acac)(γ-acac)(DMS)] and its effects on some of the systems regulating Ca2+ homeostasis were studied, also in cells dealing with the complex changes occurring during the Ca2+ signalling evoked by extracellular stimuli. [Pt(O,O′-acac)(γ-acac)(DMS)] caused the decrease of PMCA activity (but not SERCA or SPCA) and Ca2+ membrane permeability. These two opposite effects on [Ca2+]i resulted in its overall increase from 102 ± 12 nM to 250 ± 24 nM after 15 min incubation. The effects of [Pt(O,O′-acac)(γ-acac)(DMS)] were also evident when cells were stimulated with ATP: the changes in Ca2+ levels caused by purinergic stimulation resulted altered due to decreased PMCA activity and to the closure of Ca2+ channels opened by purinergic receptor. Conversely, [Pt(O,O′-acac)(γ-acac)(DMS)] did not affect the store-operated Ca2+ channels opened by thapsigargin or by ATP. [Pt(O,O′-acac)(γ-acac)(DMS)] provoked the activation of PKC-α and the production of ROS that were responsible for the Ca2+ permeability and PMCA activity decrease, respectively. The overall effect of [Pt(O,O′-acac)(γ-acac)(DMS)] is to increase the [Ca2+]i, an effect that is likely to be linked to its ability to trigger rapid apoptosis in MCF-7 cells. These data reinforce the notion that [Pt(O,O′-acac)(γ-acac)(DMS)] would be a promising drug in cancer treatment." @default.
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• W2006971133 date "2011-01-01" @default.
• W2006971133 modified "2023-09-30" @default.
• W2006971133 title "The platinum (II) complex [Pt(O,O′-acac)(γ-acac)(DMS)] alters the intracellular calcium homeostasis in MCF-7 breast cancer cells" @default.
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• W2006971133 doi "https://doi.org/10.1016/j.bcp.2010.09.012" @default.
• W2006971133 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20854797" @default.
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