Table 2.
Paired-label biodistribution of L8A4 labeled with 177Lu using CHX-A″-DTPA and with 125I using SGMIB in athymic mice with subcutaneous U87MG. EGFR human glioma xenografts
| Nuclide | Tissue | Day 1 | Day 4 | Day 8 |
|---|---|---|---|---|
| 177Lu | Blood | 15.18 ± 3.30 | 6.10 ± 2.47 | 0.99 ± 0.71 |
| Liver | 8.53 ± 2.39 | 9.36 ± 3.59 | 4.45 ± 0.87 | |
| Spleen | 5.98 ± 1.86 | 3.97 ± 0.53 | 1.84 ± 0.70 | |
| Kidneys | 6.07 ± 1.56 | 3.96 ± 1.24 | 2.00 ± 0.37 | |
| Lung | 5.39 ± 1.28 | 2.44 ± 0.94 | 0.56 ± 0.23 | |
| Bone | 5.95 ± 1.27 | 6.55 ± 1.77 | 7.56 ± 1.88 | |
| Muscle | 1.30 ± 0.44 | 0.64 ± 0.21 | 0.19 ± 0.05 | |
| Brain | 0.46 ± 0.12 | 0.21 ± 0.08 | 0.05 ± 0.03 | |
| Thyroida | 0.44 ± 0.13 | 0.24 ± 0.07 | 0.14 ± 0.07 | |
| Tumor | 36.28 ± 6.60 | 29.00 ± 7.07 | 8.67 ± 3.42 | |
| 125I | Blood | 16.24 ± 3.73 | 8.18 ± 3.25 | 1.50 ± 1.32 |
| Liver | 4.43 ± 0.77 | 2.14 ± 0.86 | 0.46 ± 0.37 | |
| Spleen | 3.77 ± 1.43 | 1.51 ± 0.52 | 0.35 ± 0.30 | |
| Kidneys | 3.87 ± 1.03 | 2.16 ± 1.18 | 0.42 ± 0.34 | |
| Lung | 5.70 ± 1.64 | 2.90 ± 1.30 | 0.50 ± 0.40 | |
| Bone | 2.51 ± 0.86 | 1.24 ± 0.51 | 0.36 ± 0.27 | |
| Muscle | 1.37 ± 0.58 | 1.29 ± 0.49 | 0.16 ± 0.13 | |
| Brain | 0.50 ± 0.13 | 0.28 ± 0.10 | 0.09 ± 0.09 | |
| Thyroida | 0.50 ± 0.13 | 0.27 ± 0.09 | 0.09 ± 0.02 | |
| Tumor | 27.56 ± 4.82 | 13.09 ± 2.97 | 3.39 ± 2.19 |
Values presented as percent injected dose per gram tissue (% ID/g), mean ″ standard deviation; five mice per group.
Percent injected dose in the thyroid.