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最新研究成果被SCI期刊International Journal of Pharmaceutics接收!
來源:時念秋教授個人網站 發布日期:2017-06-16

The goal of this work was to compare fenofibrate (FEN)-containing self-micellizing solid dispersion (SmSD) and non-self-micellizing solid dispersion (NsSD) systems. Exploration of underlying mechanisms to improve FEN dissolution/solubility profiles was conducted to understand the enhanced therapeutic potential. SmSD and NsSD of FEN systems (SmSD/FEN and NsSD/FEN) were fabricated using a fuse-quench cooling method. The self-micellizing Soluplus® cloud point was then determined experimentally and FEN phase solubility was measured in solutions containing self-micellizing Soluplus® or non-self-micellizing polymers. Physicochemical characteristics of SmSD/FEN and NsSD/FEN were evaluated using microscopic morphology, amorphous state, thermal performance, dissolution and solubility profiles. FEN exhibited an amorphous state in SmSD/FEN but was not completely amorphous in NsSD/FEN. The dissolution and solubility profile of SmSD/FEN achieved about 1.2- to 2-fold improvement over that of NsSD/FEN. Consequently, relatively enhanced hypolipidemic efficacy in vivo was observed in SmSD/FEN vs NsSD/FEN, as measured by serum levels of total cholesterol (TC), total triglycerides (TG), low-density lipoprotein (LDL) and high-density lipoprotein (HDL). Compared with non-self-micellizing polymers, self-micellizing Soluplus® significantly inhibited FEN crystal growth from a supersaturated state. However, no obvious difference in intermolecular interactions was observed between SmSD/FEN and NsSD/FEN systems. Overall, the SmSD approach exhibited as trengthened dissolution effect, enhancing FEN hyperlipidemic disease therapy efficacy.

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