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Optical Engineering

Photosensitization of human bladder carcinoma cells in vitro by 9-acetoxy-tetra-n-propylporphycene (ATPPn) bound to liposomes from soya phosphatidylcholine
Author(s): Alexandra Aicher; Kurt Miller; Ella Dumbravia Reich; Richard E. Hautmann
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Paper Abstract

The recently synthesized photosensitizer 9-acetoxy-tetra-npropylporphycene (ATPPn), a compound of the group of porphycenes, was tested for photodynamic therapy on a human bladder carcinoma cell line. Because of the hydrophobic character of the molecules, ATPPn was incorporated into soya phosphatidylcholine liposomes for administration. Bladder carcinoma cells were incubated for 60 mm at 37°C with the liposomes containing 0.5-μg ATPPn ad 1.5-ml medium. Using these concentrations, no dark toxicity and no phospholipid cytotoxicity were evident. Fluorescence measurements were made to show intracellular uptake of the photosensitizer. For the irradiation treatment, cells were exposed to coherent light delivered by a dye laser at a power density of 30 mW/cm2. Irradiation with 1, 3, 6, 12, 24, and 48 J/cm2 resulted in an increasing photokilling effect in correspondence to a decreasing survival rate of 93.0, 75.9, 60.1, 43.5, 28.3, and 11.3%, respectively. The results do encourage further investigations that include in vivo studies.

Paper Details

Date Published: 1 February 1993
PDF: 5 pages
Opt. Eng. 32(2) doi: 10.1117/12.60747
Published in: Optical Engineering Volume 32, Issue 2
Show Author Affiliations
Alexandra Aicher, Univ. of Ulm (Germany)
Kurt Miller, Univ. Ulm (Germany)
Ella Dumbravia Reich, Univ. Ulm (Germany)
Richard E. Hautmann, Univ. Ulm (Germany)

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