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Issue 2, 2013
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Light fractionated ALA-PDT enhances therapeutic efficacy in vitro; the influence of PpIX concentration and illumination parameters

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Abstract

Light fractionation, with a long dark interval, significantly increases the response to ALA-PDT in pre-clinical models and in non-melanoma skin cancer. We investigated if this increase in efficacy can be replicated in PAM 212 cells in vitro. The results show a significant decrease in cell survival after light fractionation which is dependent on the PpIX concentration and light dose of the first light fraction. This study supports the hypothesis that an underlying cellular mechanism is involved in the response to light fractionation in which a first light fraction leads to sub-lethally damaged cells that are sensitised to a second light fraction 2 hours later. The current study reveals the in vitro circumstances under which we can investigate the cellular pathways involved.

Graphical abstract: Light fractionated ALA-PDT enhances therapeutic efficacy in vitro; the influence of PpIX concentration and illumination parameters

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Publication details

The article was received on 17 Aug 2012, accepted on 12 Oct 2012 and first published on 16 Oct 2012


Article type: Communication
DOI: 10.1039/C2PP25287B
Photochem. Photobiol. Sci., 2013,12, 241-245

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    Light fractionated ALA-PDT enhances therapeutic efficacy in vitro; the influence of PpIX concentration and illumination parameters

    H. S. de Bruijn, A. G. Casas, G. Di Venosa, L. Gandara, H. J. C. M. Sterenborg, A. Batlle and D. J. Robinson, Photochem. Photobiol. Sci., 2013, 12, 241
    DOI: 10.1039/C2PP25287B

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