Table 1. Quantitation of invading tumor cells within zebrafish embryos injected with U87 cells.
| Groups (No. of injected cells) | Total no. of injected embryos | No. of injected embryos with invasive cells (mean±SD) | Dead | ||
| Low-invasion | Medium-invasion | High-invasion | |||
| U87 control (n = 300) | 150 | 3.2±1.4% | 0 | 0 | 26 |
| U87 sphere cells (n = 300) | 150 | 6.6±2.6% | 8.3±1.4% | 5.8±3.0% | 29 |
| U87 CD133-expressing cells (n = 300) | 150 | 15.0±2.3% | 31.7±2.2% | 39.2±2.5% | 30 |
U87 sphere cells and U87 CD133+ GSCs. The data were obtained from three replicate experiments of 50 injected embryos for each experiment.