Effects of PDT on the endocytic pathway

David Kessel

doi:10.1117/12.840530

2 March 2010 Effects of PDT on the endocytic pathway

David Kessel

Proceedings Volume 7551, Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy XIX; 755102 (2010) https://doi.org/10.1117/12.840530
Event: SPIE BiOS, 2010, San Francisco, California, United States

Abstract

Two lines of evidence point to an early effect of photodamage on membrane trafficking. [1] Internalization of a fluorescent probe for hydrophobic membrane loci was impaired by prior photodamage. [2] Interference with the endocytic pathway by the PI-3 kinase antagonist wortmannin led to accumulation of cytoplasmic vacuoles suggesting a block in the recycling of plasma membrane components. Prior photodamage blocked this pathway so that no vacuoles were formed upon exposure of cells to wortmannin. In a murine hepatoma line, the endocytic pathway was preferentially sensitive to lysosomal photodamage. The role of photodamage to the endocytic pathway as a factor in PDT efficacy remains to be assessed.

Citation Download Citation

David Kessel "Effects of PDT on the endocytic pathway", Proc. SPIE 7551, Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy XIX, 755102 (2 March 2010); https://doi.org/10.1117/12.840530

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