alexa Photodynamic therapy of age-related macular degeneration: History and principles.
Ophthalmology

Ophthalmology

Journal of Clinical & Experimental Ophthalmology

Author(s): van den Bergh H

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Abstract We briefly review the history and principles of photodynamic therapy (PDT), especially as it is applied to choroidal neovascularization (CNV) in age-related macular degeneration (AMD). After a brief general history of PDT, we discuss the relationship between the physicochemical structure and photodynamic activity of the second-generation photosensitizers, such as those in current clinical use. We then discuss the basic photophysics of photosensitizer molecules, and describe the initial chemical reactions induced by activated sensitizers. We outline a novel method for screening photosensitizers to be used in treating CNV, as well as the complex biomolecular pathways modulated by PDT-induced oxidative stress and the vascular effects of PDT in solid tumors. The paper closes with a discussion of how all this information might be used to improve the selectivity and efficacy of clinically useful photosensitizers. This article was published in Semin Ophthalmol and referenced in Journal of Clinical & Experimental Ophthalmology

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