In vitro photodynamic activity of kryptocyanine.

Abstract

The photophysical properties of 1,1'-diethyl-4,4'-carbocyanine chloride (kryptocyanine) have been measured in methanol solution and for the dye bound to human serum albumin, incorporated in neutral micelles and after incubation with leukemia cells. In all cases, it is found that formation of the triplet state of the dye occurs with low efficiency and that illumination of the dye under aerobic conditions does not produce significant yields of O2(1 delta g). Instead, the only efficient photoprocess involves rapid internal conversion from the first excited singlet state to the ground state, probably via isomerization of the polymethine sequence. These findings are discussed with respect to the demonstrated ability of kryptocyanine to photodestroy leukemic cells.

• Authors: A Harriman, G Luengo, K S Gulliya
• Journal: Photochemistry and photobiology (Photochem Photobiol) Vol. 52 Issue 4 Pg. 735-40 (Oct 1990) ISSN: 0031-8655 [Print] United States
• PMID: 2089420 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S., Research Support, U.S. Gov't, P.H.S.)

Chemical References

• Carbocyanines
• Serum Albumin
• kryptocyanine

Topics

• Carbocyanines (chemistry)
• Chemical Phenomena
• Chemistry, Physical
• Humans
• Kinetics
• Photochemotherapy
• Photolysis
• Serum Albumin (chemistry)