Another step toward DNA selective targeting: NiII and CuII complexes of a Schiff base ligand able to bind gene promoter G-quadruplexes

Alessio Terenzi, Giampaolo Barone, Christian R. Kowol, Alexander Roller, Alessio Terenzi, Daniela Lötsch, Bernhard K. Keppler, Walter Berger, Sushilla Van Schoonhoven, Giampaolo Barone

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

DNA G-rich sequences are able to form four-stranded structures organized in stacked guanine tetrads. These structures, called G-quadruplexes, were found to have an important role in the regulation of oncogenes expression and became, for such a reason, appealing targets for anticancer drugs. Aiming at finding selective G-quadruplex binders, we have designed, synthesized and characterized a new water soluble Salen-like Schiff base ligand and its NiII and CuII metal complexes. UV-Vis, circular dichroism and FRET measurements indicated that the nickel complex can stabilize oncogene promoter G-quadruplexes with high selectivity, presenting no interactions with duplex DNA at all. The same compound exhibited dose-dependent cytotoxic activity in MCF-7 breast cancer cells when combined with lipofectamine as lipophilic carrier.
Original languageEnglish
Pages (from-to)7758-7767
Number of pages10
JournalDalton Transactions
Volume45
Publication statusPublished - 2016

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

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