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• W2895492757 abstract "Peramivir was a novel and highly potent neuraminidase (NA) inhibitor for the treatment of influenza A and B. However, it exhibited a very low oral bioavailability (only 3%) due to the high polarity (log P of −1.4) and the low membrane permeability across the intestine. To utilize the PEPT1-mediated prodrug strategy to improve the oral absorption and develop the oral alternative, seven amino acid ester prodrugs and seven amino acid amide prodrugs have been synthesized. The permeability of these prodrugs across Caco-2 cells were screened. Peramivr-(CH2)2-l-Val and Peramivir-l-Ile were of the highest permeability in ester prodrugs and amide prodrugs, respectively, and then they were selected for further studies. Glycylsarcosine (gly-sar) uptake by Caco-2 could be inbihited by Peramivir-(CH2)2-l-Val and Peramivir-l-Ile in a concentration-dependent manner, and the IC50 was 1.34 ± 0.31 mM and 1.78 ± 0.48 mM, respectively. The direct uptake of Peramivir-(CH2)2-l-Val and Peramivir-l-Ile in MDCK-PEPT1 cells were significantly higher than in MDCK mock cells, and could be markedly inhibited by gly-sar. The uptake of Peramivir-(CH2)2-l-Val and Peramivir-l-Ile (0.01 to 50 mM) in MDCK-hPEPT1 cells conformed to Michaelis–Menten Equation. The oral bioavailability of peramivir was 65.3% and 37.3% after the oral administration of Peramivir-(CH2)2-l-Val and Peramivir-l-Ile to rats, respectively. The oral absorption and bioactivation of Peramivir-(CH2)2-l-Val was rapid and extensive, and no Peramivir-(CH2)2-l-Val was found in plasma. Because the amide bond was relatively stable, Peramivir-l-Ile could not be totally converted to the parent drug in vivo. Peramivir-(CH2)2-l-Val with good oral profiles and rapid bioactivation might be a promising prodrug for the further clinic development. The present study also corroborated the idea that the PEPT1-mediated prodrug approach has enormous promise for improving the oral absorption of poorly absorbed drug." @default.
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• W2895492757 date "2018-11-01" @default.
• W2895492757 modified "2023-10-03" @default.
• W2895492757 title "PEPT1-mediated prodrug strategy for oral delivery of peramivir" @default.
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• W2895492757 doi "https://doi.org/10.1016/j.ajps.2018.05.008" @default.
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