Darunavir displays potent activity against HIV strains resistant to other available protease inhibitor. Darunavir inhibits P-glycoprotein-mediated efflux of calcein-acetoxymethyl ester in L-MDR1 cells with the inhibitory potency of 121 mM. Darunavir is a protein inhibits that mimics the phenylalanine sequences at positions 167 and 168 of the gag-pol polypeptide and binds to the active sites of the HIV protease, thereby inhibiting its activity. Darunavir blocks the infectivity and replication of each of the HIV-1 variants at concentrations up to 5 μM. Darunavir shows strong ARV activity against a selected panel of 19 recombinant clinical isolates carrying multiple protease mutations conferring resistance to an average of five other protien inhibitors. Darunavir inhibits 75% of 1501 PI-resistant viruses tested with a half maximal effective concentration (EC50) of < 10 nM.
Molecular Weight | 547.66 |
Formula | C27H37N3O7S |
CAS Number | 206361-99-1 |
Solubility (25°C) | 10 mM in DMSO |
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.
[2] Keating GM Paediatr Drugs. Darunavir: A Review in Pediatric HIV-1 Infection.
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