(Metallo)porphyrins as potent phototoxic anti-cancer agents after irradiation with red light.
Chemistry
; 21(3): 1179-83, 2015 Jan 12.
Article
em En
| MEDLINE
| ID: mdl-25421757
ABSTRACT
Novel photoactive (metallo)porphyrins were synthesised and characterised. When irradiated with light at a wavelength greater than 600â
nm, these porphyrins act as photosensitisers and show high cytotoxicity towards two different human cancer cell lines with IC50 values down to 0.4â
µM. A paramagnetic copper(II) porphyrin is the first photosensitiser to display excellent phototoxicity, explained by the electron paramagnetic resonance (EPR) spin trapping of hydroxy radicals and experimentally confirmed by the discovery of elevated levels of reactive oxygen species (ROS) inside A2780 cells after irradiation with red light. This finding indicates that paramagnetic compounds should be considered for photodynamic therapy (PDT). Furthermore, an additive effect of cisplatin and a zinc porphyrin, both at subtherapeutic concentrations of 0.22â
µM, was observed.
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Base de dados:
MEDLINE
Assunto principal:
Porfirinas
/
Fármacos Fotossensibilizantes
/
Antineoplásicos
Limite:
Humans
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article