Table 2. CXCR4 Antibody Binding Assay and Calcium Mobilization Assay Results of Bivalent Ligand 1a and CXCR4 Monovalent Control 3aa.
| antibody binding | Ca2+ flux | |
|---|---|---|
| compd | IC50 (nM) | IC50 (nM) |
| IT1tb | 7.40 ± 3.80 | 32.5 ± 8.8 |
| 1a | 3600 ± 300 | 8300 ± 2300 |
| 3a | 69000 ± 24000 | 53000 ± 6600 |
The values are the mean ± SEM of three independent experiments. The CXCR4 antibody-binding assay was performed on CHO-CXCR4 cells. The antagonist calcium assay was conducted on HOS-CXCR4 cells.
Data adopted from ref (15).