ABT-751 is an orally bioavailable tubulin inhibitor with IC50 of about 1.5 and 3.4 µM in neuroblastoma and non-neuroblastoma cell lines, respectively. ABT-751 had a broad spectrum of antitumor activity in a panel of 30 tumor cell lines in vitro and in xenograft models of human tumors in vivo, including gastric, colorectal, lung, and breast cancer models. ABT-751 showed antitumor activity against a broad spectrum of tumor lines including those resistant to conventional chemotherapies. A single dose of ABT-751 (30 mg/kg, intravenously) induced a rapid, transient reduction in tumor perfusion. After 1 h, tumor perfusion decreased by 57% before recovering to near pretreatment levels within 6 h. In contrast, ABT-751 produced little change in muscle perfusion at either time point. ABT-751, at concentrations corresponding to plasma levels achieved in vivo, caused endothelial cell retraction and significant loss of microtubules within 1 h.
| Molecular Weight | 371.41 |
| Formula | C18H17N3O4S |
| CAS Number | 141430-65-1 |
| Solubility (25°C) | DMSO ≥72 mg/mL |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
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