Photochemical, photophysical and photobiological properties of some methylallopsoralens which are potential agents for photochemotherapy.
Biochim Biophys Acta
; 925(2): 101-8, 1987 Aug 13.
Article
em En
| MEDLINE
| ID: mdl-2441755
ABSTRACT
Two new trimethylallopsoralens, 4,7,4'- and 4,7,5'-trimethylallopsoralen, form molecular complexes with DNA and by successive UVA (320-400 nm) irradiation photobind monofunctionally to the macromolecule. The DNA photobinding rates at 365 nm and photobinding quantum yields at 330 nm are markedly higher for 4,7,4'-trimethylallopsoralen than for 4,7,5'-trimethylallopsoralen. Their capacities to generate singlet oxygen in water and benzene are low, particularly for 4,7,4'-trimethylallopsoralen, and the two trimethylallopsoralens completely lack skin phototoxicity on guinea-pig skin. Both compounds show antiproliferative activity in terms of DNA synthesis inhibition in Ehrlich cells and T2 phage infectivity higher than that displayed by angelicin. In view of its monofunctional character, lack of skin phototoxicity, low singlet oxygen yield and antiproliferative activity, 4,7,4'-trimethylallopsoralen deserves further clinical studies as a potential photochemotherapeutic agent.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Furocumarinas
/
Terapia PUVA
/
DNA
Idioma:
En
Revista:
Biochim Biophys Acta
Ano de publicação:
1987
Tipo de documento:
Article