TABLE 2.
ASBESTOS-INDUCED P53 PROMOTER ACTIVITY IS ABOLISHED BY AN IRON CHELATOR (PHYTIC ACID AND DEFEROXAMINE) OR FREE RADICAL SCAVENGER (SODIUM BENZOATE)
| Exposure
|
|||
|---|---|---|---|
| Condition | 1 h | 4 h | 24 h |
| Control | 100 ± 0* | 100 ± 0 | 100 ± 0 |
| Asbestos (25 μg/cm2) | 160 ± 10† | 172 ± 6† | 190 ± 5† |
| + Phytic acid (500 μM) | 120 ± 8‡ | 100 ± 1‡ | 125 ± 5‡ |
| + Deferoxamine (1 mM) | 105 ± 2‡ | 100 ± 1‡ | 105 ± 1‡ |
| + Na-benzoate (100 μM) | 135 ± 22 | 100 ± 1‡ | 109 ± 4‡ |
Data expressed as mean ± SEM % control Luciferase RLU after various exposure periods (1, 4, and 24 h); n = 6.
P < 0.05 versus control.
P < 0.05 versus asbestos.