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Antiproliferative activity of 8-methoxypsoralen on DU145 prostate cancer cells under UVA and blue light.
Photochemical & Photobiological Sciences 2017 July 2
The use of photoactivatable 8-methoxypsoralen (8-MOP) as potential focal treatment towards prostate cancer cells is proposed here. Our results, obtained on isolated DNA and DU145 cells, indicate that blue light, besides UVA, is able to activate 8-MOP. When compared to UVA, blue light irradiation led to a modulation of the extent and the types of 8-MOP-DNA damage, specially cross-links, coupled to a still valuable antiproliferative effect. Our data suggest that the proapototic activity of 8-MOP is related not only to DNA damage and reactive oxygen species generation but also to the modulation of cell signalling pathways. In particular, a different activation of p38 and p44/42 mitogen-activated protein kinases was detected depending on the light wavelengths.
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