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

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′=PPh(3) (triphenylphosphine), 1; TPA (1,3,5‐triaza‐7‐phosphaadamantane), 2, and Me(2)‐imy (1,3‐dimethylimidazol‐2‐ylidene), 3) were synthesized and fully characterized by s...

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Detalles Bibliográficos
Autores principales: Tabrizi, Leila, Yang, Won Seok, Chintha, Chetan, Morrison, Liam, Samali, Afshin, Ramos, Joe W., Erxleben, Andrea
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8252463/
https://www.ncbi.nlm.nih.gov/pubmed/34248416
http://dx.doi.org/10.1002/ejic.202100120
Descripción
Sumario: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′=PPh(3) (triphenylphosphine), 1; TPA (1,3,5‐triaza‐7‐phosphaadamantane), 2, and Me(2)‐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 IC(50) 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.