Table 2.
Pretargeted tumor/organ ratios.
| Time post-injectiona | |||
|---|---|---|---|
| Organ/tissue | 4 h | 24 h | 48 h |
| Blood | 18 ± 2 | 380 ± 90 | > 450 |
| Skin | 1.7 ± 0.4 | 14 ± 2 | 20 ± 8 |
| Adipose | 3.2 ± 1.5 | 23 ± 6 | 28 ± 13 |
| Muscle | 5.3 ± 1.6 | 57 ± 41 | 105 ± 40 |
| Bone (femur) | 5.3 ± 1.6 | 38 ± 16 | 60 ± 19 |
| Heart | 49 ± 36 | 323 ± 108 | 244 ± 85 |
| Lung | 7.2 ± 3.7 | 39 ± 3 | 63 ± 6 |
| Spleen | 20 ± 5 | 52 ± 12 | 40 ± 21 |
| Liver | 13.9 ± 3.7 | 33 ± 11 | 32 ± 13 |
| Kidneys (both) | 8.1 ± 0.2 | 17 ± 3 | 22 ± 3 |
| Stomach (with contents) | 48 ± 22 | 252 ± 119 | 276 ± 236 |
| Sm Intestine | 27 ± 4 | 217 ± 76 | 183 ± 129 |
| Lg Intestine | 80 ± 36 | 83 ± 53 | 128 ± 16 |
| C6 Tumor | 0.7 ± 0.1 | 3.4 ± 0.3 | 10 ± 9 |
| LS174T Tumor | 1 | 1 | 1 |
Tumor/organ ratios (mean ± s.d., n=3) a Mice were injected with 500 ug bsAb i.v. 24 h later, mice received 250 ug dextran-DOTA i.v. 1 h later, mice received 100–150 uCi of 177 Lu-DOTA i.v. and were sacrificed at 4, 24, and 48 h p.i.