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-porphyrin (5,10-DiOH) release cargo effectively after irradiation. Liposomes with 5,10-DiOH showed a quicker release compared to the other sensitizers upon irradiation at 420 nm. Further, we observed through fractionated irradiation, that most of the release took place during light application, while the permeability of the liposome decreased shortly after light exposure. This effect was stronger with liposomes containing less cholesterol.
Enzian et al. (Tue,) studied this question.