PMID: 9540217Apr 16, 1998Paper

Differential photosensitivity in wild-type and mutant p53 human colon carcinoma cell lines

Journal of Photochemistry and Photobiology. B, Biology
A M FisherC J Gomer

Abstract

Tumor sensitivity to cancer therapies may be modulated by the p53 status of the malignant cells. Generally, tumors retaining wild-type p53 are more sensitive to radiotherapy and some chemotherapeutic agents than are tumors with either a mutated or deleted p53 phenotype. The role of p53 in the responsiveness to PDT as a cancer treatment is clinically unknown. In the current study, we evaluated the photosensitivity of two human colon carcinoma cell lines, one expressing wild-type p53 protein and the other expressing mutant p53. Wild-type p53 cells were found to be significantly more sensitive to Photofrin-mediated photodynamic treatment measured by clonogenic assay. Uptake of the photosensitizer was equivalent for both cell lines. Interestingly, sensitivity of the colon carcinoma cell lines to ionizing radiation was similar. These two cell lines represent a useful model for examining p53 involvement in the cellular response to PDT-mediated oxidative stress.

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Citations

Oct 8, 2005·Cancer Chemotherapy and Pharmacology·H B LeeS H Teo
May 10, 2000·International Journal of Radiation Oncology, Biology, Physics·L CortiK Beroukas
Aug 5, 2015·Photodiagnosis and Photodynamic Therapy·Aleksandra Kawczyk-KrupkaAleksander Sieroń
Jun 10, 2008·Gastroenterology·Ganapathy A PrasadLynn S Borkenhagen
Jul 24, 2015·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Pilar Acedo, Joanna Zawacka-Pankau
Sep 22, 2018·Photochemistry and Photobiology·Aline B de P AbrantesMauricio S Baptista
Oct 29, 2009·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Jaromír MikesPeter Fedorocko
Jun 24, 1998·Journal of the National Cancer Institute·T J DoughertyQ Peng

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