原卟啉IX
光动力疗法
荧光
化学
病理
分布(数学)
生物物理学
医学
生物
数学
量子力学
物理
数学分析
有机化学
作者
Kimmo Mäkinen,Sari Grönlund-Pakkanen,M. Tiirikainen,Pekka Nuutinen,Ari Kuusisto,Esko Alhava
标识
DOI:10.3109/00365529708996510
摘要
Photodynamic therapy (PDT) is a method for local and selective tumour destruction achieved by the action of light on a photosensitizing drug.We investigated the distribution of 5-amino-laevulinic acid (ALA)-induced protoporphyrin-IX fluorescence in rat oesophagus by fluorescence microscopic examination and then studied the effects of PDT.The highest level of fluorescence was achieved in the mucosa after 4 h of 300 mg/kg ALA administration. A clear difference in fluorescence between mucosa and muscularis was found in all samples except those taken 24 h after ALA administration. PDT with ALA caused destruction of the mucosal and, partly, submucosal layers of the oesophagus without damaging the muscularis layer.According to our results with microscopic fluorescence kinetics and the preliminary results of PDT, selective destruction of the superficial layer of the rat oesophagus is achieved with PDT after ALA administration.
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