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Proceedings Paper

Synergistic effects of laser and adjuvant therapies for cancer: progress in the development of novel cancer treatment methods using combinations of photothermal, photochemical, immunotherapy, and chemotherapy
Author(s): Wei R. Chen; Kenneth E. Bartels D.V.M.; Mladen Korbelik; Hong Liu; Robert E. Nordquist
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Paper Abstract

Combination therapy has been commonly used in chemotherapy, taking advantage of different effects of different chemotherapeutic agents. The treatment effects are often synergistic. The same approach has been investigated in laser phototherapy. Specifically, different combinations of laser photothermal interaction, laser photochemical interaction, immunotherapy and chemotherapy have been used in the treatment of tumors. These novel approaches showed promise in cancer treatment, particularly against metastatic tumors. The recent development in this area is discussed in this paper. Furthermore, a specific combination of photodynamic therapy (PDT) with a novel immunoadjuvant, glycated chitosan (GC), has shown to be effective in the treatment mammary tumors and lung tumors in mice. In the treatment of EMT6 tumor-bearing mice, the Photofrin-based PDT and GC has significantly increased the survival rates from 37.5% with PDT alone to 62.5% when a 0.1-ml 0.5% GC was peritumoral injected immediately after PDT treatment. The survival rate was further increased to 75.0% when GC of higher concentration was used. In comparison, the individual components of the PDT-GC treatment showed either no effect or very limited effects. In the treatment of a poorly immunogenic tumor model, Line 1 lung tumors in mice, the combination of PDT and GC resulted in a 37.5% survival rate, while no survival mice were observed with PDT alone.

Paper Details

Date Published: 15 April 2005
PDF: 6 pages
Proc. SPIE 5695, Optical Interactions with Tissue and Cells XVI, (15 April 2005); doi: 10.1117/12.603986
Show Author Affiliations
Wei R. Chen, Univ. of Central Oklahoma (United States)
Kenneth E. Bartels D.V.M., Oklahoma State Univ./College of Veterinary Medicine and Ctr. for Laser Research (United States)
Mladen Korbelik, British Columbia Cancer Agency (Canada)
Hong Liu, Univ. of Oklahoma (United States)
Robert E. Nordquist, Wound Healing of Oklahoma (United States)

Published in SPIE Proceedings Vol. 5695:
Optical Interactions with Tissue and Cells XVI
Steven L. Jacques; William P. Roach, Editor(s)

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