Dolutegravir (GSK1349572) is a novel potent integrase inhibitor with an IC50 of 2.7 nM in vitro. Dolutegravir (GSK1349572) is a compound for the treatment of HIV infection. Dolutegravir (GSK1349572) exhibited in vitro activity against most clinical isolates obtained from patients failing RAL-based therapy. In PBMC cell assay, Dolutegravir (GSK1349572) inhibited HIV integrase with the antiviral IC50=0.51 and IC90=2.0 nM. In MT-4 antiviral assays, potency shift extrapolated to 100% human serum was 75-fold providing PA-IC90=152 nM in PBMCs. Dolutegravir (GSK1349572) had a markedly different resistance profile as evidenced by limited cross-resistance to RAL-resistant molecular clones, by its in vitro activity against clinical isolates obtained from patients failing RAL-based therapy, and in selecting different mutations with low level FC during serial passage. In vitro experiments support the potential for Dolutegravir (GSK1349572) to have a higher genetic barrier to resistance when compared to 1st generation integrase inhibitors.
|Preparation method||Growing MT-4 cells exponentially at a density of 500000 or 600000 /mL are infected with HIV-1 strain IIIB at a viral multiplicity of infection of 0.001 or a 50% tissue culture infective dose of 4 to 10. Then aliquoting the cells to 96-well plates in the presence of varying concentrations of S/GSK1349572. After incubation for 4 or 5 days, using the yellow tetrazolium MTT reagent [3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyltetrazolium bromide] to determine antiviral activity by a cell viability assay that either measured bioluminescence with a CellTiter-Glo luminescent reagent or measured absorbance at 560 and 690 nm .|
|Concentrations||0 to 10 μM|
|Incubation time||4 days or 5 days|
|Solubility (25°C)||DMSO 60 mg/mL|
Powder -20°C 3 years ; 4°C 2 years
In solvent -80°C 6 months ; -20°C 1 month
|Body Surface Area (m2)||0.007||0.025||0.15||0.05||0.02||0.5|
|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.
 Sharon L Walmsley, et al. N Engl J Med. Dolutegravir plus abacavir-lamivudine for the treatment of HIV-1 infection
 Parul Patel, et al. J Antimicrob Chemother. Pharmacokinetics of the HIV integrase inhibitor S/GSK1349572 co-administered with acid-reducing agents and multivitamins in healthy volunteers
 Ivy Song, et al. Br J Clin Pharmacol. Effect of atazanavir and atazanavir/ritonavir on the pharmacokinetics of the next-generation HIV integrase inhibitor, S/GSK1349572
 Charlotte Charpentier, et al. AIDS. In-vitro phenotypic susceptibility of HIV-2 clinical isolates to the integrase inhibitor S/GSK1349572
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