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Gold(I) Complexes with a Quinazoline Carboxamide Alkynyl Ligand: Synthesis, Cytotoxicity, and Mechanistic Studies.

ABSTRACT: A series of gold(I) complexes with the general formula [Au(L2)(L')] (L2=4-phenyl-N-(prop-2-yn-1-yl)quinazoline-2-carboxamide, L'=PPh3 (triphenylphosphine), 1; TPA (1,3,5-triaza-7-phosphaadamantane), 2, and Me2-imy (1,3-dimethylimidazol-2-ylidene), 3) were synthesized and fully characterized by spectroscopic methods. The alkynyl ligand L2 belongs to the quinazoline carboxamide class of ligands that are known to bind to the translocator protein (TSPO) at the outer mitochondrial membrane. 1 and 2 exert cytotoxic effects in bladder cancer cells with IC50 values in the low micromolar range. Further mechanistic analysis indicated that the two complexes both act by inducing reactive oxygen species and caspase-mediated apoptosis. The complexes inhibit thioredoxin reductase, an established target of anticancer gold(I) complexes. Docking studies confirmed that after ligand exchange the free ligand L2 can interact with the TSPO binding site.

SUBMITTER: Tabrizi L 

PROVIDER: S-EPMC8252463 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature

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Gold(I) Complexes with a Quinazoline Carboxamide Alkynyl Ligand: Synthesis, Cytotoxicity, and Mechanistic Studies.

Tabrizi Leila L   Yang Won Seok WS   Chintha Chetan C   Morrison Liam L   Samali Afshin A   Ramos Joe W JW   Erxleben Andrea A  

European journal of inorganic chemistry 20210511 20

A series of gold(I) complexes with the general formula [Au(<b>L2</b>)(<b>L'</b>)] (<b>L2</b>=4-phenyl-<i>N</i>-(prop-2-yn-1-yl)quinazoline-2-carboxamide, <b>L'</b>=PPh<sub>3</sub> (triphenylphosphine), <b>1</b>; TPA (1,3,5-triaza-7-phosphaadamantane), <b>2</b>, and Me<sub>2</sub>-imy (1,3-dimethylimidazol-2-ylidene), <b>3</b>) were synthesized and fully characterized by spectroscopic methods. The alkynyl ligand <b>L2</b> belongs to the quinazoline carboxamide class of ligands that are known to b  ...[more]

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