Fosmanogepix (APX001) is a first-in-class and orally available broad-spectrum antifungal agent, which targets the highly conserved Gwt1 fungal enzyme. Fosmanogepix (APX001) is an N-phosphonooxymethyl precursor which is rapidly and completely metabolized by systemic alkaline phosphatases to the active moiety, APX001A. Fosmanogepix (APX001) can be used in development for the treatment of invasive fungal infections.
| Molecular Weight | 468.4 |
| Formula | C22H21N4O6P |
| CAS Number | 2091769-17-2 |
| Form | Solid |
| Solubility (25°C) | DMSO 5 mg/mL (ultrasonic and adjust pH to 4 with HCl) |
| 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.
[1] Drew J Winston, et al. Clin Infect Dis. Fosmanogepix Therapy of Disseminated Fusarium Infection
[2] Samantha E Jacobs, et al. F1000Res. Novel antifungal agents in clinical trials
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