Table 2. Viability measurements using (4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assay of primary keratinocytes and melanocytes stained with 5(6) carboxyfluorescein-N-hydroxysuccinimidyl ester (CFSE).

All values reported as percent relative to unstained controls (at time 0) ± SD, with Bonferroni’s multiple comparisons test corrected p-values.

Keratinocytes
CFSE	24 hours	48 hours	72 hours	7 days
0 μM	100.2±36.1	100.2±12.6	100.0±11.9	100.0±18.2
5 μM	88.6±18.4 p = 0.720	99.83±24.7 p>0.999	100.0±12.9 p>0.999	100.0±19.9 p>0.999
10 μM	100.2±22.0 p>0.999	100.0±18.7 p>0.999	88.2±12.1 p = 0.670	85.2±26.1 p = 0.484
Melanocytes
CFSE	24 hours	48 hours	72 hours	7 days
0 μM	78.5±15.2	101.0±5.6	99.8±14.9	99.8±17.4
5 μM	97.5±16.0 p = 0.133	96.8±9.5 p>0.999	132.6±20.0 p = 0.004	114.0±19.0 p = 0.839
10 μM	75.0±13.9 p>0.999	113.0± 15.6 p = 0.879	116.5±24.2 p = 0.230	107.2±9.5 p>0.999