Photodynamic effects of isosteric water-soluble phthalocyanines on human nasopharynx KB carcinoma cells
作者:Julieta Marino、María C. García Vior、Lelia E. Dicelio、Leonor P. Roguin、Josefina Awruch
DOI:10.1016/j.ejmech.2010.06.002
日期:2010.9
The photodynamic activity of water-soluble cationic zinc(II) phthalocyanines using human nasopharynx carcinoma (KB cells) was investigated. A sulfur-linked cationic dye, named: 2,9(10),16(17),23(24)-tetrakis [(2-trimethylammonium)ethylsulfanyl]phthalocyaninatozinc(II) tetraioidide (13) is the most active of four sensitizer assays and shows a singlet oxygen quantum yield of 0.58 and a higher bathochromic shift of 10 nm for the Q-band as compared with the oxygen-linked cationic aliphatic phthalocyanine: 2,9 (10),16(17),23(24)-tetrakis[(2-trimethylammonium)ethoxy]phthalocyaninatozinc(II) tetraioidide (11) and the best photo-stability in water in comparison with their tetra-a-substituted counterparts 1,8(11),15 (18),22(25)-tetrakis[(2-trimethylammonium)ethoxy]phthalocyaninatozinc(II) tetraioidide (12) and 1,8 (11),15(18),22(25)-tetrakis[(2-trimethylammonium)ethylsulfanyl]phthalocyaninatozinc(II) tetraioidide (14). Phthalocyanine 13, partially localized in lysosomes, led to cell photoinactivation in a concentrationand light dose-dependent manner. After photodynamic treatment, compound 13 induced an apoptotic response - as indicated by morphological cell changes - an increase in the activity of caspase-3 and the cleavage of poly-ADP-ribose-polymerase substrate (PARP). (C) 2010 Elsevier Masson SAS. All rights reserved.