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Sánchez-Camacho J, Infante-Tadeo S, Carrasco AC, Scoditti S, Martínez Á, Barroso-Bujans F, Sicilia E, Pizarro AM, Salassa L. Flavin-Conjugated Pt(IV) Anticancer Agents. Inorg Chem 2023; 62:5644-5651. [PMID: 36990656 DOI: 10.1021/acs.inorgchem.3c00193] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
In situ activation of Pt(IV) to Pt(II) species is a promising strategy to control the anticancer activity and overcome the off-target toxicity linked to classic platinum chemotherapeutic agents. Herein, we present the design and synthesis of two new asymmetric Pt(IV) derivatives of cisplatin and oxaliplatin (1·TARF and 2·TARF, respectively) bearing a covalently bonded 2',3',4',5'-tetraacetylriboflavin moiety (TARF). 1H and 195Pt NMR spectroscopy shows that 1·TARF and 2·TARF can be effectively activated into toxic Pt(II) species, when incubated with nicotinamide adenine dinucleotide, sodium ascorbate, and glutathione in the dark and under light irradiation. Density functional theory studies of the dark Pt(IV)-to-Pt(II) conversion of 2·TARF indicate that the process involves first hydride transfer from the donor to the flavin moiety of the complex, followed by electron transfer to the Pt(IV) center. When administered to MDA-MB-231 breast cancer cells preincubated with nontoxic amounts of ascorbate, 2·TARF displays enhanced toxicity (between 1 and 2 orders of magnitude), suggesting that the generation of oxaliplatin can selectively be triggered by redox activation. Such an effect is not observed when 2 and TARF are coadministered under the same conditions, demonstrating that covalent binding of the flavin to the Pt complex is pivotal.
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Affiliation(s)
- Juan Sánchez-Camacho
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
| | | | - Ana C Carrasco
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
| | - Stefano Scoditti
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy
| | - Álvaro Martínez
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
| | - Fabienne Barroso-Bujans
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Centro de Física de Materiales, CSIC-UPV/EHU, Paseo Manuel Lardizábal 5, Donostia 20018, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao 48011, Spain
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy
| | - Ana M Pizarro
- IMDEA Nanociencia, Faraday 9, Madrid 28049, Spain
- Unidad Asociada de Nanobiotecnología CNB-CSIC-IMDEA, Madrid 28049, Spain
| | - Luca Salassa
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao 48011, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
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Momeni BZ, Abd-El-Aziz AS. Recent advances in the design and applications of platinum-based supramolecular architectures and macromolecules. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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