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Chitosan derivative nanocarrier: Safety evaluation, antibacterial property and ascorbyl palmitate encapsulation

机译:壳聚糖衍生物纳米载体:安全性评估,抗菌性能和抗坏血酸棕榈酸酯封装

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摘要

A chitosan derivative, methyl ether-terminated poly(ethyiene oxide)-4-methoxycinnamolyphthaloylchito-san (PCPLC) was prepared, characterized and self-assembled into nanoparticles. Encapsulation of ascorbyl palmitate (AP) into PCPLC gave 689 ± 0.98 nm particles with encapsulation efficiency of 84% at 56% drug loading. The encapsulated AP showed significant improved stability as examined by ~1H NMR spectroscopy. The obtained particles displayed no short-term cytotoxicity against the human skin melanoma A-375 cell line using the MTT assay and no short-term skin irritation on human volunteers using a single topical application as patch and photopatch tests. In addition, aqueous suspension of PCPLC nanoparticles successfully inhibited the growth of Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25923.
机译:制备了壳聚糖衍生物,甲基醚封端的聚环氧乙烷-4-甲氧基肉桂基邻苯二甲酰壳聚糖(PCPLC),表征并自组装成纳米颗粒。在56%的载药量下,将抗坏血酸棕榈酸酯(AP)封装到PCPLC中,得到689±0.98 nm颗粒,封装效率为84%。经1H NMR光谱检查,封装的AP表现出显着改善的稳定性。使用MTT测定法,获得的颗粒对人皮肤黑素瘤A-375细胞系没有短期细胞毒性,而使用单个局部应用作为贴剂和光斑贴剂试验,对人类志愿者没有短期皮肤刺激作用。此外,PCPLC纳米颗粒的水悬浮液成功抑制了大肠杆菌ATCC 25922和金黄色葡萄球菌ATCC 25923的生长。

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