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• W1879839219 abstract "A nanohybrid system for taste masking of sildenafil Ji-Hee Lee1,*, Goeun Choi1,*, Yeon-Ji Oh1, Je Won Park1, Young Bin Choy3, Mung Chul Park1, Yeo Joon Yoon1, Hwa Jeong Lee2, Hee Chul Chang4, Jin-Ho Choy1 1Center for Intelligent Nano-Bio Materials (CINBM), Department of Bioinspired Science and Department of Chemistry and Nano Science, 2Division of Life and Pharmaceutical Sciences and College of Pharmacy, Ewha Womans University, Seoul, Korea; 3Department of Biomedical Engineering, College of Medicine and Institute of Medical and Biological Engineering, Medical Research Center, Seoul National University, Seoul, Korea; 4Global Strategy Center and Pharmaceutical Research Institute, Daewoong Pharmaceutical Co., Ltd., Seoul, Korea*These authors contributed equally to this workAbstract: A nanohybrid was prepared with an inorganic clay material, montmorillonite (MMT), for taste masking of sildenafil (SDN). To further improve the taste-masking efficiency and enhance the drug-release rate, we coated the nanohybrid of SDN–MMT with a basic polymer, polyvinylacetal diethylaminoacetate (AEA). Powder X-ray diffraction and Fourier transform infrared experiments showed that SDN was successfully intercalated into the interlayer space of MMT. The AEA-coated SDN–MMT nanohybrid showed drug release was much suppressed at neutral pH (release rate, 4.70 ± 0.53%), suggesting a potential for drug taste masking at the buccal cavity. We also performed in vitro drug release experiments in a simulated gastric fluid (pH = 1.2) and compared the drug-release profiles of AEA-coated SDN–MMT and Viagra®, an approved dosage form of SDN. As a result, about 90% of SDN was released from the AEA-coated SDN–MMT during the first 2 hours while almost 100% of drug was released from Viagra®. However, an in vivo experiment showed that the AEA-coated SDN–MMT exhibited higher drug exposure than Viagra®. For the AEA-coated SDN–MMT, the area under the plasma concentration–time curve from 0 hours to infinity (AUC0-∞) and maximum concentration (Cmax) were 78.8 ± 2.32 µg • hour/mL and 12.4 ± 0.673 µg/mL, respectively, both of which were larger than those obtained with Viagra® (AUC0-∞ = 69.2 ± 3.19 µg • hour/mL; Cmax = 10.5 ± 0.641 µg/mL). Therefore, we concluded that the MMT-based nanohybrid is a promising delivery system for taste masking of SDN with possibly improved drug exposure.Keywords: montmorillonite, nanohybrids, polyvinylacetal diethylaminoacetate, sildenafil citrate, taste masking" @default.
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• W1879839219 date "2012-03-01" @default.
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• W1879839219 title "A nanohybrid system for taste masking of sildenafil" @default.
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• W1879839219 doi "https://doi.org/10.2147/ijn.s28264" @default.
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