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- W2155792409 abstract "ABSTRACT S/GSK1349572 is a novel integrase inhibitor with potent in vitro anti-HIV activity, an in vitro resistance profile different from those of other integrase inhibitors, and favorable preclinical safety and pharmacokinetics (PK). Randomized, double-blind, placebo-controlled single-dose and multiple-dose, dose escalation studies evaluated the PK, safety, and tolerability of S/GSK1349572 for healthy subjects. In the single-dose study, two cohorts of 10 subjects each (8 active, 2 receiving placebo) received suspension doses of 2, 5, 10, 25, 50, and 100 mg in an alternating panel design. In the multiple-dose study, three cohorts of 10 subjects each (8 active, 2 receiving placebo) received suspension doses of 10, 25, and 50 mg once daily for 10 days. A cytochrome P450 3A (CYP3A) substudy with midazolam was conducted with the 25-mg dose. Laboratory testing, vital signs, electrocardiograms (ECGs), and PK sampling were performed at regular intervals. S/GSK1349572 was well tolerated. Most adverse events (AEs) were mild, with a few moderate AEs reported. Headache was the most common AE. No clinically significant laboratory trends or ECG changes were noted. PK was linear over the dosage range studied. The steady-state geometric mean area under the concentration-time curve over a dosing interval (AUC 0-τ ) and maximum concentration of the drug in plasma ( C max ) ranged from 16.7 μg·h/ml (coefficient of variation [CV], 15%) and 1.5 μg/ml (CV, 24%) at a 10-mg dose to 76.8 μg·h/ml (CV, 19%) and 6.2 μg/ml (CV, 15%) at a 50-mg dose, respectively. The geometric mean steady-state concentration at the end of the dosing interval ( C τ ) with a 50-mg dose was 1.6 μg/ml, approximately 25-fold higher than the protein-adjusted 90% inhibitory concentration (0.064 μg/ml). The half-life was approximately 15 h. S/GSK1349572 had no impact on midazolam exposure, indicating that it does not modulate CYP3A activity. The PK profile suggests that once-daily, low milligram doses will achieve therapeutic concentrations." @default.
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- W2155792409 date "2010-01-01" @default.
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- W2155792409 title "Pharmacokinetics and Safety of S/GSK1349572, a Next-Generation HIV Integrase Inhibitor, in Healthy Volunteers" @default.
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- W2155792409 doi "https://doi.org/10.1128/aac.00842-09" @default.
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