OPC 31260 is a vasopressin V2 selective antagonist. Arginine vasopressin (AVP) plays an important part in circulatory and water homeostasis. The V2 receptor subtype is important in water retention, cardiac remodeling in congestive heart failure (CHF), and renal hemodynamic alterations, and is considered a target for polysystic kidney disease. OPC-31260 has been shown to inhibit the development of polycystic kidney disease in several animal models.
| Molecular Weight | 464 |
| Formula | C27H29N3O2 · HCl |
| CAS Number | 138470-70-9 |
| Solubility (25°C) | DMSO: ≥15 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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