Table I.
Tumor incidence and survival time in non-obese diabetic/severe combined immunodeficiency mice (n=5 in each group) implanted with DiI-retaining cells or DiI-negative cells from the NCH421k cell line at a serial implantation gradient.
| Density of implanted tumor cells | ||||
|---|---|---|---|---|
| Parameter | 102 | 103 | 104 | 105 |
| DiI-retaining | ||||
| Tumor incidence, n | 2 | 3 | 4 | 5 |
| Survival time, daysa | 117±9 | 72±7 | 58±13 | 49±6 |
| DiI-negative | ||||
| Tumor incidence, n | 0 | 1 | 3 | 5 |
| Survival time, daysa | >180 | 125 | 97±13 | 64±5 |
a
presented as the mean ± standard deviation.