Table 1. Colony formation of PrEC, LNCaP and PC cells in soft agar in the presence of PL.
| Cell types | Treatment | No of colonies | s.d. |
|---|---|---|---|
| PrEC | No treatment | 0 | ±0 |
| LNCaP | No treatment | 154 | ±7.5 |
| LNCaP | PL (0.75 mg ml−1) | 17 | ±4 |
| LNCaP | PL (1.0 mg ml−1) | 5 | ±2 |
| PC3 | No Treatment | 208 | ±1.8 |
| PC3 | PL (0.75 mg ml−1) | 106 | ±8 |
| PC3 | PL (1.0 mg ml−1) | 68 | ±5 |
The cells were cultured in soft agar in the absence or presence of different concentrations of PL for 2 weeks. Every 3 days, fresh growth medium containing PL was added into the cultures. s.d.: standard deviation over five independent experiments.