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

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

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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 languageEnglish
Pages (from-to)85-90
Number of pages6
JournalPhotochemistry and Photobiology
Volume65
Issue number1
Publication statusPublished - Jan 1997

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ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Biochemistry
  • Biophysics

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