Abstract:
:Photodynamic treatment is often thought to produce reactive oxygen species (ROS) that directly induce killing; the nomenclature and phrases revolve around such notions of light-dependency. Few studies reference the possible existence of oxidation products formed in secondary reactions, which bear cytotoxicity competitive to their ROS precursors. Here, we highlight the paper by Girotti and Korytowski in this issue of Photochemistry and Photobiology, which does just that. In this paper, they report on cholesterol hydroperoxides, which are formed after photosensitized oxidation and yield cytotoxic mixtures in dark reactions after the light's turned off. Some of the hydroperoxides are transported by protein carriers and damage tissue outside their site of origin. A similar dark cytotoxicity may be anticipated for biological peroxides from in vivo photodynamic therapy.
journal_name
Photochem Photobioljournal_title
Photochemistry and photobiologyauthors
Chiemezie C,Greer Adoi
10.1111/php.12984subject
Has Abstractpub_date
2019-01-01 00:00:00pages
460-461issue
1eissn
0031-8655issn
1751-1097journal_volume
95pub_type
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