[en] We disclose novel amphiphilic ruthenium and osmium complexes that auto-assemble into nanomedicines with potent antiproliferative activity by inhibition of mitochondrial respiration. The self-assembling units were rationally designed from the [M(p-cymene)(1,10-phenanthroline)Cl]PF6 motif (where M is either RuII or OsII) with an appended C16 fatty chain to achieve high cellular activity, nano-assembling and mitochondrial targeting. These amphiphilic complexes block cell proliferation at the sub-micromolar range and are particularly potent towards glioblastoma neurospheres made from patient-derived cancer stem cells. A subcutaneous mouse model using these glioblastoma stem cells highlights one of our C16 OsII nanomedicines as highly successful in vivo. Mechanistically, we show that they act as metabolic poisons, strongly impairing mitochondrial respiration, corroborated by morphological changes and damage to the mitochondria. A genetic strategy based on RNAi gave further insight on the potential involvement of microtubules as part of the induced cell death. In parallel, we examined the structural properties of these new amphiphilic metal-based constructs, their reactivity and mechanism.
Disciplines :
Pharmacy, pharmacology & toxicology Chemistry
Author, co-author :
Marloye, Mickaël; Microbiology, Bioorganic & Macromolecular Chemistry, Faculté de Pharmacie, Université libre de Bruxelles (ULB), Boulevard du Triomphe, 1050 Brussels, Belgium
Inam, Haider; Department of Biomedical Engineering, Pennsylvania State University, University Park, PA 16802, USA
Moore, Connor J; Department of Biomedical Engineering, Pennsylvania State University, University Park, PA 16802, USA
Mertens, Tyler R; Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
Ingels, Aude; Department of Pharmacotherapy and Pharmaceutics, Faculté de Pharmacie, Université libre de Bruxelles (ULB), Boulevard du Triomphe, 1050 Brussels, Belgium
Koch, Marilin; Harvey Cushing Neuro-Oncology Laboratories, Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
Nowicki, Michal O; Harvey Cushing Neuro-Oncology Laboratories, Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
Mathieu, Véronique; Department of Pharmacotherapy and Pharmaceutics, Faculté de Pharmacie, Université libre de Bruxelles (ULB), Boulevard du Triomphe, 1050 Brussels, Belgium ; ULB Cancer Research Center (UCRC), Université libre de Bruxelles (ULB), 1050 Brussels, Belgium
Pritchard, Justin R; Department of Biomedical Engineering, Pennsylvania State University, University Park, PA 16802, USA
Awuah, Samuel G ; Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
Lawler, Sean E; Harvey Cushing Neuro-Oncology Laboratories, Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
Meyer, Franck ; Microbiology, Bioorganic & Macromolecular Chemistry, Faculté de Pharmacie, Université libre de Bruxelles (ULB), Boulevard du Triomphe, 1050 Brussels, Belgium
Berger, Gilles ; Université de Mons - UMONS ; Microbiology, Bioorganic & Macromolecular Chemistry, Faculté de Pharmacie, Université libre de Bruxelles (ULB), Boulevard du Triomphe, 1050 Brussels, Belgium ; Harvey Cushing Neuro-Oncology Laboratories, Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
R550 - Institut des Sciences et Technologies de la Santé
Funders :
Fédération Wallonie-Bruxelles Belgian Brain Tumor Support Fonds De La Recherche Scientifique - FNRS
Funding text :
M. M. thanks Véronique Megalizzi and Michel Gelbcke for helpful discussions and guidance on the analysis of video microscopy experiments, the team of the Analytical Platform of the Faculty of Pharmacy (ULB) for the record of MS spectra and the team of G-time laboratory (ULB) for the ICP-MS experiments. We would also like to thank Dr Tomoko Sengoku and Mr Michael Alstott for the support with our redox metabolism experiments, supported by the shared resource(s) of the University of Kentucky Markey Cancer Center (P30CA177558). This research was partially funded by NCI R50 CA243706-02 for MON, NCI R01 CA258421-01 for SGA, by the Fédération Wallonie-Bruxelles (EG/MA/JCD/CBV 19-24) for M. M. and by the Belgian Brain Tumor Support (BBTS) for V. M.; G. B. was the recipient of an FRS-FNRS award.
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