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1 October 2003 Effects of Ursodeoxycholic Acid on Photodynamic Therapy in a Murine Tumor Model
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Abstract

We previously reported that the efficacy of photodynamic therapy (PDT) in cell culture was enhanced by ursodeoxycholic acid (UDCA), a nontoxic bile acid. In this study, we examined the ability of UDCA to promote tumor control by PDT in the mouse, using the radiation-induced fibrosarcoma tumor and the photosensitizing agent tin etiopurpurin (SnET2). These experiments revealed that the addition of UDCA to a PDT protocol promoted inhibition of tumor growth, a phenomenon unrelated to either altered SnET2 biodistribution or the level of vascular shutdown during irradiation. These results indicate that UDCA acts solely by promoting direct tumor cell kill by PDT.

Greta M. Garbo, M. Graça H. Vicente, Victor Fingar, and David Kessel "Effects of Ursodeoxycholic Acid on Photodynamic Therapy in a Murine Tumor Model," Photochemistry and Photobiology 78(4), 407-410, (1 October 2003). https://doi.org/10.1562/0031-8655(2003)078<0407:EOUAOP>2.0.CO;2
Received: 13 May 2003; Accepted: 1 July 2003; Published: 1 October 2003
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