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MTT assay of photodynamic therapy effect on A431 cells.
Notes: Cells were incubated with ALA or ALA PLGA for 6 hours (A) or 24 hours (B). Data were presented as mean ± standard deviation from at least three independent experiments. *P < 0.05, **P < 0.01.
Abbreviatons: ALA, 5-aminolevulinic acid ; MTT, 3-(4,5)-dimethylthiahiazo(-z-y1)-3,5-di-phenytetrazoliumromide.
