Table 1.

Absence of toxicity of the MAL, Temoporfin and red light independently administered to the cultures.

	A431	SCC13	HN5	SCC9
MAL [0.5 mM]	99.3 ± 1.9	100.6 ± 1.5	101.8 ± 3.2	100.0 ± 3.1
Temoporfin [25 nM]	99.9 ± 2.7	100.2 ± 0.9	102.7 ± 1.0	100.1 ± 0.9
Red light (12 J/cm2)	100.1 ± 3.5	100.1 ± 0.3	99.1 ± 2.5	102.1 ± 2.6

The values are the results obtained from the MTT assay relative to untreated control cells, n = 3. Values were represented as mean ± SEM.