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Proceedings Paper

Development of a novel in-vivo drug/in-vitro light system to investigate mechanisms of cell killing with photodynamic therapy
Author(s): James A. Hampton; Steven H. Selman
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Paper Abstract

Over the last decade considerable interest has developed in the use of exogenously administered chromophores in combination with visible light for the treatment of human tumors. Whether cells are killed directly, or indirectly as a result of disruption of the tissue, microvasculature is unknown. The authors have developed methods to assess in short term culture the effects of PDT on precision cut tissue slices. The use of these tissue slices provide an important link between in vivo studies and in vitro isolated cultured cells for the following reasons: 1) slices contain all of the normal cells in their proper in vivo architectural arrangement; 2) since slices can be obtained relatively easily and in a very short period of time (a few minutes), animals can be treated with compounds in vivo, the tissue can be removed, sliced and mechanistic studies performed in vitro (without the several hours delay required to produce cultured cells); 3) in vitro comparisons between species, including human, can be readily made; and 4) mechanisms of PDT-induced cell killing can be studied in the absence of a functioning vascular system. Using this in vivo drug/in vitro light system, the results presented will detail the findings using normal rat liver and a transplantable rat tumor model.

Paper Details

Date Published: 1 June 1991
PDF: 12 pages
Proc. SPIE 1426, Optical Methods for Tumor Treatment and Early Diagnosis: Mechanisms and Techniques, (1 June 1991); doi: 10.1117/12.44052
Show Author Affiliations
James A. Hampton, Medical College of Ohio (United States)
Steven H. Selman, Medical College of Ohio (United States)


Published in SPIE Proceedings Vol. 1426:
Optical Methods for Tumor Treatment and Early Diagnosis: Mechanisms and Techniques
Thomas J. Dougherty, Editor(s)

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