Structurally Simple Osmium(II) Polypyridyl Complexes as Photosensitizers for Photodynamic Therapy in the Near Infrared.
Angew Chem Int Ed Engl
; 62(20): e202218347, 2023 05 08.
Article
en En
| MEDLINE
| ID: mdl-36917074
ABSTRACT
Five osmium(II) polypyridyl complexes of the general formula [Os(4,7-diphenyl-1,10-phenanthroline)2 L]2+ were synthesized as photosensitizers for photodynamic therapy by varying the nature of the ligand L. Thanks to the pronounced π-extended structure of the ligands and the heavy atom effect provided by the osmium center, these complexes exhibit a high absorption in the near-infrared (NIR) region (up to 740â
nm), unlike related ruthenium complexes. This led to a promising phototoxicity in vitro against cancer cells cultured as 2D cell layers but also in multicellular tumor spheroids upon irradiation at 740â
nm. The complex [Os(4,7-diphenyl-1,10-phenanthroline)2 (2,2'-bipyridine)]2+ was found to be the most efficient against various cancer cell lines, with high phototoxicity indexes. Experiments on CT26 tumor-bearing BALB/c mice also indicate that the OsII complexes could significantly reduce tumor growth following 740â
nm laser irradiation. The high phototoxicity in the biological window of this structurally simple complex makes it a promising photosensitizer for cancer treatment.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Fotoquimioterapia
/
Rutenio
/
Complejos de Coordinación
/
Neoplasias
Límite:
Animals
Idioma:
En
Año:
2023
Tipo del documento:
Article