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• W2102048418 startingPage "9689" @default.
• W2102048418 abstract "Geminal bisphosphonates (BPs), used in the clinic for the treatment of hypercalcaemia and skeletal metastases, have been also exploited for promoting the specific accumulation of platinum antitumor drugs in bone tissue. In this work, the platinum dinuclear complex [{Pt(en)}2(μ-AHBP-H2)]+ (1) (the carbon atom bridging the two phosphorous atoms carrying a 2-ammonioethyl and a hydroxyl group, AHBP-H2) has been used as scaffold for the synthesis of a Pt(II) trinuclear complex, [{Pt(en)}3(μ-AHBP)]+ (2), and a Pt(IV) adamantane-shaped dinuclear complex featuring an oxo-bridge, [{PtIV(en)Cl}2(μ-O)(μ-AHBP-H2)]+ (3) (X-ray structure). Compound 2 undergoes a reversible, pH dependent, rearrangement with a neat switch point around pH = 5.4. Compound 3 undergoes a one-step electrochemical reduction at Epc = −0.84 V affording compound 1. Such a potential is far lower than that of glutathione (−0.24 V), nevertheless compound 3 can undergo chemical reduction to 1 by GSH, most probably through a different (inner-sphere) mechanism. In vitro cytotoxicity of the new compounds, tested against murine glioma (C6) and human cervix (HeLa) and hepatoma (HepG2) cell lines, has shown that, while the PtIV dimer 3 is inactive up to a concentration of 50 μM, the two PtII polynuclear compounds 1 and 2 have a cytotoxicity comparable to that of cisplatin with the trinuclear complex 2 generally more active than the dinuclear complex 1." @default.
• W2102048418 created "2016-06-24" @default.
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• W2102048418 date "2012-01-01" @default.
• W2102048418 modified "2023-09-23" @default.
• W2102048418 title "Dinuclear Pt(ii)-bisphosphonate complexes: a scaffold for multinuclear or different oxidation state platinum drugs" @default.
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• W2102048418 doi "https://doi.org/10.1039/c2dt30712j" @default.
• W2102048418 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22782180" @default.
• W2102048418 hasPublicationYear "2012" @default.
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