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Bormio Nunes J, Hager S, Mathuber M, Pósa V, Roller A, Enyedy ÉA, Stefanelli A, Berger W, Keppler BK, Heffeter P, Kowol CR. Cancer Cell Resistance Against the Clinically Investigated Thiosemicarbazone COTI-2 Is Based on Formation of Intracellular Copper Complex Glutathione Adducts and ABCC1-Mediated Efflux. J Med Chem 2020; 63:13719-13732. [PMID: 33190481 PMCID: PMC7706001 DOI: 10.1021/acs.jmedchem.0c01277] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Indexed: 12/12/2022]
Abstract
COTI-2 is a novel anticancer thiosemicarbazone in phase I clinical trial. However, the effects of metal complexation (a main characteristic of thiosemicarbazones) and acquired resistance mechanisms are widely unknown. Therefore, in this study, the copper and iron complexes of COTI-2 were synthesized and evaluated for their anticancer activity and impact on drug resistance in comparison to metal-free thiosemicarbazones. Investigations using Triapine-resistant SW480/Tria and newly established COTI-2-resistant SW480/Coti cells revealed distinct structure-activity relationships. SW480/Coti cells were found to overexpress ABCC1, and COTI-2 being a substrate for this efflux pump. This was unexpected, as ABCC1 has strong selectivity for glutathione adducts. The recognition by ABCC1 could be explained by the reduction kinetics of a ternary Cu-COTI-2 complex with glutathione. Thus, only thiosemicarbazones forming stable, nonreducible copper(II)-glutathione adducts are recognized and, in turn, effluxed by ABCC1. This reveals a crucial connection between copper complex chemistry, glutathione interaction, and the resistance profile of clinically relevant thiosemicarbazones.
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Affiliation(s)
- Julia
H. Bormio Nunes
- Institute
of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Strasse 42, Vienna 1090, Austria
- Inorganic
Chemistry Department, Institute of Chemistry, University of Campinas - UNICAMP, Campinas, São Paulo 13083-970, Brazil
| | - Sonja Hager
- Institute
of Cancer Research, Medical University of
Vienna, Borschkegasse
8a, Vienna 1090, Austria
- Research
Cluster “Translational Cancer Therapy Research”, Vienna 1090, Austria
| | - Marlene Mathuber
- Institute
of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Strasse 42, Vienna 1090, Austria
| | - Vivien Pósa
- Department
of Inorganic and Analytical Chemistry, Interdisciplinary Excellence
Centre and MTA-SZTE Lendület Functional Metal Complexes Research
Group, University of Szeged, Dóm tér 7, Szeged H-6720, Hungary
| | - Alexander Roller
- Institute
of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Strasse 42, Vienna 1090, Austria
| | - Éva A. Enyedy
- Department
of Inorganic and Analytical Chemistry, Interdisciplinary Excellence
Centre and MTA-SZTE Lendület Functional Metal Complexes Research
Group, University of Szeged, Dóm tér 7, Szeged H-6720, Hungary
| | - Alessia Stefanelli
- Institute
of Cancer Research, Medical University of
Vienna, Borschkegasse
8a, Vienna 1090, Austria
| | - Walter Berger
- Institute
of Cancer Research, Medical University of
Vienna, Borschkegasse
8a, Vienna 1090, Austria
- Research
Cluster “Translational Cancer Therapy Research”, Vienna 1090, Austria
| | - Bernhard K. Keppler
- Institute
of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Strasse 42, Vienna 1090, Austria
- Research
Cluster “Translational Cancer Therapy Research”, Vienna 1090, Austria
| | - Petra Heffeter
- Institute
of Cancer Research, Medical University of
Vienna, Borschkegasse
8a, Vienna 1090, Austria
- Research
Cluster “Translational Cancer Therapy Research”, Vienna 1090, Austria
| | - Christian R. Kowol
- Institute
of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Waehringer Strasse 42, Vienna 1090, Austria
- Research
Cluster “Translational Cancer Therapy Research”, Vienna 1090, Austria
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Korp JD, Bernal I, Watkins SF, Fronczek FR. The stereochemistry of organosulfur compounds. XIX. The crystal and molecular structure of 10-(1,3-dithiolan-2-ylidene)-10H-indeno[1,2-f]-1,2,3,4,5-pentathiepin. J Heterocycl Chem 1982. [DOI: 10.1002/jhet.5570190302] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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