The kinetics of mitochondrial dysfunction after UVB irradiation in human keratinocytes progressed in a time post-irradiation-dependent manner, and they are closely related to cell death. However, there are certain levels of apoptosis, although low, in the absence of mitochondrial alterations. In addition, our data suggest that ROS play a greater role in keratinocyte UVB damage than reactive nitrogen species.
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Paz et al. (2008) studied this question.
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