1 April 2003 Correlation of in vivo photosensitizer fluorescence and photodynamic-therapy-induced depth of necrosis in a murine tumor model
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Abstract
We compared light-induced fluorescence (LIF) to nominal injected drug dose for predicting the depth of necrosis response to photodynamic therapy (PDT) in a murine tumor model. Mice were implanted with radiation-induced fibrosarcoma (RIF) and were injected with 0, 5, or 10 mg/kg Photofrin. 630-nm light (30 J/cm2, 75 mW/cm2) was delivered to the tumor after 24 hours. Fluorescence emission (λexcitation = 545 nm, λemission = 628 nm) from the tumor was measured. The LIF data had less scatter than injected drug dose, and was found to be at least as good as an injected drug dose for predicting the depth of necrosis after PDT. Our observations provide further evidence that fluorescence spectroscopy can be used to quantify tissue photosensitizer uptake and to predict PDT tissue damage.
Rex Cheung, Michael Solonenko, Theresa M. Busch, Fabio Del Piero, M. P. Putt, Stephen M. Hahn, Arjun G. Yodh, "Correlation of in vivo photosensitizer fluorescence and photodynamic-therapy-induced depth of necrosis in a murine tumor model," Journal of Biomedical Optics 8(2), (1 April 2003). https://doi.org/10.1117/1.1560011
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