Journal
CANCER LETTERS
Volume 157, Issue 2, Pages 123-131Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/S0304-3835(00)00453-5
Keywords
nasopharyngeal carcinoma; photosensitizers; photodynamic therapy
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Temoporfin (meta-tetra (hydroxyphenyl)chlorin; mTHPC) potentiated a 100-fold higher cytotoxic effect than hematopor phyrin derivative (HPD) on two nasopharyngeal carcinoma cell lines (HK1 and CNE2) in terms of the overall photodynamic therapy (PDT) dose. The cellular uptake, evaluated by Row cytometry and spectrophotometry demonstrated that mTHPC exhibited higher uptake ability than HPD. Confocal laser scanning microscopy detection for both the sensitizer and mitochondria probe on the same cell images revealed that both drugs accumulated diffusely in the cytoplasm and that mitochrondria is a target organelle. Photo-activation ruptured the mitochrondria. with more pronounced mitochondnal damage being observed in mTHPC-PDT course. This correlated well with the cell photokilling efficiency of mTHPC. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.
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