Comparative photophysical study of disulfonated aluminum phthalocyanine in unilamellar vesicles and leukemic K562 cells

Suman Dhami; Garry Rumbles; Alexander J. MacRobert; David Phillips

doi:10.1111/j.1751-1097.1997.tb01881.x

Comparative photophysical study of disulfonated aluminum phthalocyanine in unilamellar vesicles and leukemic K562 cells

Suman Dhami, Garry Rumbles, Alexander J. MacRobert, David Phillips

National Renewable Energy Laboratory

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

The photophysical properties of cis-disulfonated aluminum phthalocyanine (AlPcS₂) in unilamellar vesicles (liposomes) of DL-α-dipalmitoyl- phosphatidylcholine have been measured. Both the fluorescence and triplet quantum yields decreased with increasing sensitizer concentration. The time- resolved fluorescence decays, analyzed by both the sum of exponentials and decay time distribution analyses, are compared with those reported for AlPcS₂ in leukemic K562 cells. Information on the photodynamic transport and localization mechanism has been obtained by drawing correlations between the two systems, indicating active transport of the phthalocyanine into tumor cells involving lysosomal accumulation.

Original language	English
Pages (from-to)	85-90
Number of pages	6
Journal	Photochemistry and Photobiology
Volume	65
Issue number	1
DOIs	https://doi.org/10.1111/j.1751-1097.1997.tb01881.x
Publication status	Published - Jan 1997

ASJC Scopus subject areas

Biochemistry
Physical and Theoretical Chemistry

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abstract = "The photophysical properties of cis-disulfonated aluminum phthalocyanine (AlPcS2) in unilamellar vesicles (liposomes) of DL-α-dipalmitoyl- phosphatidylcholine have been measured. Both the fluorescence and triplet quantum yields decreased with increasing sensitizer concentration. The time- resolved fluorescence decays, analyzed by both the sum of exponentials and decay time distribution analyses, are compared with those reported for AlPcS2 in leukemic K562 cells. Information on the photodynamic transport and localization mechanism has been obtained by drawing correlations between the two systems, indicating active transport of the phthalocyanine into tumor cells involving lysosomal accumulation.",

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AU - Phillips, David

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AB - The photophysical properties of cis-disulfonated aluminum phthalocyanine (AlPcS2) in unilamellar vesicles (liposomes) of DL-α-dipalmitoyl- phosphatidylcholine have been measured. Both the fluorescence and triplet quantum yields decreased with increasing sensitizer concentration. The time- resolved fluorescence decays, analyzed by both the sum of exponentials and decay time distribution analyses, are compared with those reported for AlPcS2 in leukemic K562 cells. Information on the photodynamic transport and localization mechanism has been obtained by drawing correlations between the two systems, indicating active transport of the phthalocyanine into tumor cells involving lysosomal accumulation.

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