Infoscience

Journal article

A new drug-screening procedure for photosensitizing agents used in photodynamic therapy for CNV

Because vascular occlusion has been observed as a consequence of photodynamic therapy (PDT), this method has been successfully used for the treatment of choroidal neovascularization (CNV) in age-related macular degeneration (AMD). However, most conventional photosensitizers, primarily developed for tumor PDT, lack selectivity for the targeting of neovascularization. An experimental model has been developed for drug screening of new photosensitizers for the treatment of CNV associated with AMD. It consists of intravenous (IV) injection of photosensitizers and fluorescent dyes into the chick's chorioallantoic membrane (CAM), followed by measurement of fluorescence pharmacokinetics, leakage from the vascular system, and photothrombic efficacy.

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