New complexes of usnate with lanthanides ions: La(III), Nd(III), Tb(III), Gd(III), synthesis, characterization, and investigation of cytotoxic properties in MCF-7 cells

• Published in: Inorganica Chimica Acta 2020-06, Vol.506, p.119546, Article 119546
• Main Authors: Nunes, Daniel Mendes, Pessatto, Lucas Roberto, Mungo, Daniel, Oliveira, Rodrigo Juliano, Pinto, Leandro Moreira de Campos, da Costa Iemma, Monica Rosas, Altei, Wanessa Fernanda, Martines, Marco Antonio Utrera, Pereira Duarte, Adriana
• Format: Article
• Language: English
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2020.119546

[Display omitted] •Synthesis and characterization of new complexes of usnate with lanthanides ions.•The new compounds showed cytotoxic activity in MCF-7 tumor cells (breast cancer).•Both complex, La((III) and Gd(III), were selective of MCF-7 Tumor Cells. New lanthanides ions complexes were synthesized from the reactions of aqueous – ethanolic solution of the sodium usnate with an aqueous solution of the lanthanides ions. DFT data, UV–VIS spectroscopy, IR, 1H NMR, 13C NMR, HMBC, and elemental and thermal analyses, are consistent with the following general coordination formula: [LnL3(H2O)x], wherein L = C18H15O7–, Ln = Gd(III), Tb(III), x = 2 and Ln = La(III), Nd(III), x = 3. The chelates presented higher cytotoxic activity in breast cancer tumor cells (MCF-7) compared to organic and inorganic precursors. The two more potent compounds, complexes of La(III) and Gd(III), were tested in non-tumorigenic breast cells MCF-10A, showing less cytotoxicity, which evidenced their selectivity towards tumor cells.