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MEK inhibition increases 5-ALA-PDT sensitivity of moderately and least sensitive cell lines. a Cellular fluorescence in relative fluorescence unit (RFU) in moderately sensitive DLD-1 and Hs 578 T cells, and least sensitive H460 cells. b % Cell viability 24 h after PDT relative to controls (DMSO, no 5-ALA). The data presented as mean ± SD from three independent experiments. *p < 0.01 by two-way ANOVA with Turkey’s post hoc test
