PHOTOFRIN-INDUCED FLUORESCENCE IN PROGRESSIVE AND REGRESSIVE MURINE COLONIC-CANCER CELLS - CORRELATION WITH CELL PHOTOSENSITIVITY

被引:10
作者
BLAIS, J
AMIRAND, C
BALLINI, JP
DEBEY, P
FOULTIER, MT
PATRICE, T
机构
[1] UNIV PARIS 06,F-75231 PARIS 05,FRANCE
[2] INST BIOL PHYSICOCHIM,INSERM,U310,F-75005 PARIS,FRANCE
[3] FAC PHARM NANTES,F-44035 NANTES,FRANCE
关键词
PHOTOFRIN; PHOTODYNAMIC THERAPY; MICROSPECTROFLUOROMETRY; FLUORESCENCE IMAGING; COLONIC CANCER CELLS; METASTASIS;
D O I
10.1016/1011-1344(94)07081-X
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Microspectrofluorometry and fluorescence imaging were used to investigate the intracellular fluorescence of two murine colonic cancer cell lines - a progressive cell line (PROb) and a regressive cell line (REGb) - incubated with Photofrin. These two cell lines, which were initially cloned from the same chemically induced colonic murine cancer, differ in their metastatic properties and have been considered as models to mimic the tumoral cell heterogeneity. The fluorescence from cytoplasmic area of cells incubated with Photofrin appeared as a complex emission, with two maxima at 632 and 695 nm assigned to monomer species, and a poorly resolved band around 665 nm assigned to aggregates. The spectral distribution was shown to depend on the incubation time, with an aggregate contribution increasing for extended periods. The amount of Photofrin uptake, as determined from the total fluorescence intensity, was found for PROb to be twice that for REGb. However, the phototoxicities were quite similar for both cell lines, suggesting that drug concentration may not be the only determining factor in photobiological efficiency.
引用
收藏
页码:225 / 231
页数:7
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