RT Journal Article T1 Evaluation of the In Vitro and In Vivo Efficacy of Ruthenium Polypyridyl Compounds against Breast Cancer A1 Lenis Rojas, Oscar A1 Roma-Rodrigues, Catarina A1 Fernandes, Alexandra A1 Carvalho, Andreia A1 Cordeiro, Sandra A1 Guerra-Varela, Jorge A1 Sánchez Piñón, Laura A1 Vázquez García, Digna A1 López-Torres, Margarita A1 Fernández, Alberto A1 Fernández, Jesús J. K1 MCF7 zebrafish xenograft K1 Ruthenium K1 Polypyridyl compounds K1 Cytotoxicit K1 Cell death K1 Cell cycle AB The clinical success of cisplatin, carboplatin, and oxaliplatin has sparked the interest of medicinal inorganic chemistry to synthesize and study compounds with non-platinum metal centers. Despite Ru(II)–polypyridyl complexes being widely studied and well established for their antitumor properties, there are not enough in vivo studies to establish the potentiality of this type of compound. Therefore, we report to the best of our knowledge the first in vivo study of Ru(II)–polypyridyl complexes against breast cancer with promising results. In order to conduct our study, we used MCF7 zebrafish xenografts and ruthenium complexes [Ru(bipy)2(C12H8N6-N,N)][CF3SO3]2 Ru1 and [{Ru(bipy)2}2(μ-C12H8N6-N,N)][CF3SO3]4 Ru2, which were recently developed by our group. Ru1 and Ru2 reduced the tumor size by an average of 30% without causing significant signs of lethality when administered at low doses of 1.25 mg·L−1. Moreover, the in vitro selectivity results were confirmed in vivo against MCF7 breast cancer cells. Surprisingly, this work suggests that both the mono- and the dinuclear Ru(II)–polypyridyl compounds have in vivo potential against breast cancer, since there were no significant differences between both treatments, highlighting Ru1 and Ru2 as promising chemotherapy agents in breast cancer therapy. PB MDPI SN 1422-0067 YR 2021 FD 2021-08-18 LK http://hdl.handle.net/10347/32014 UL http://hdl.handle.net/10347/32014 LA eng NO Lenis-Rojas, O.A.; Roma-Rodrigues, C.; Fernandes, A.R.; Carvalho, A.; Cordeiro, S.; Guerra-Varela, J.; Sánchez, L.; Vázquez-García, D.; López-Torres, M.; Fernández, A.; et al. Evaluation of the In Vitro and In Vivo Efficacy of Ruthenium Polypyridyl Compounds against Breast Cancer. Int. J. Mol. Sci. 2021, 22, 8916. https://doi.org/10.3390/ijms22168916 NO The UDC authors acknowledge the financial support received from the Xunta de Galicia (Galicia, Spain) under the Grupos de Referencia Competitiva Programme: Project ED431C 2018/39 (Quimolmat Group). The Portuguese authors acknowledge the Portuguese Foundation for Science and Technology (FCT—Fundação para a Ciência e a Tecnologia) for funding through projects PEst 2015-2020, UID/Multi/04349/2013, RECI/QEQ-QIN/0189/2012, and UID/QUI/00100/2020. This work was financed by national funds from FCT—Fundação para a Ciência e a Tecnologia, I.P., in the scope of the project UIDP/04378/2020 and UIDB/04378/2020 of the Research Unit on Applied Molecular Biosciences—UCIBIO and the project LA/P/0140/2020 of the Associate Laboratory Institute for Health and Bioeconomy—i4HB. DS Minerva RD 22 abr 2026