Department of Pharmacy, COMSATS University Islamabad, Abbottabad Campus, 22060, Pakistan.
Department of Pharmacy, COMSATS University Islamabad, Lahore Campus, 54000, Pakistan.
Int J Pharm. 2019 Apr 20;561:19-34. doi: 10.1016/j.ijpharm.2019.02.029. Epub 2019 Feb 25.
This article reports moxifloxacin (Mox)-loaded nanocomposite films (CSN) of chitosan and chemically reduced silver (Ag). The synthesis of silver nanoparticles was confirmed by specific surface plasmon resonance (SPR) peaks detected via UV-Visible spectroscopy at the wavelength range of 400-450 nm. The embedded Mox was chemically characterized and kinetically analyzed for in-vitro drug release and ex-vivo drug permeation through rat skin. The prepared films presented higher swelling ratio and lower tensile strength (TS) and better elongation at break (EB) than control formulation (pure chitosan film). All the prepared Mox-loaded, non-crosslinked formulations presented sustained release of drug up to 12 h while slow and prolonged drug release up to 36 h was observed in Mox-loaded crosslinked CSN films. Drug permeation studies indicated that the maximum cumulative amount of Mox permeated (%) among Mox-loaded, non-crosslinked CSN films was displayed by CSM1 (57.79%); while in case of Mox-loaded, crosslinked CSN films, the highest drug permeation was presented by CSM18 (62.87%) in 24 h. The antibacterial efficacy of the prepared films was tested in-vitro against S. aureus (ATCC # 6538), P. aeruginosa (ATCC # 9721) and two clinically isolated strains of methicillin resistant S. aureus (MRSA). CSN films presented excellent against the all the selected strains with antibacterial potential being highest against S. aureus. In summary, the promising antibacterial potential of the CSN films recommend its biomedical application for use in wound dressing.
本文报道了载有莫西沙星(Mox)的壳聚糖纳米复合膜(CSN)和化学还原银(Ag)。通过紫外-可见光谱在 400-450nm 的波长范围内检测到特定的表面等离子体共振(SPR)峰,证实了银纳米粒子的合成。嵌入的 Mox 通过化学表征,并对体外药物释放和通过大鼠皮肤的体外药物渗透进行动力学分析。与对照制剂(纯壳聚糖膜)相比,所制备的膜具有更高的溶胀比、更低的拉伸强度(TS)和更好的断裂伸长率(EB)。所有制备的载药、未交联制剂均表现出药物持续释放长达 12 小时,而载药交联 CSN 膜则观察到药物缓慢和延长释放长达 36 小时。药物渗透研究表明,在载药、未交联 CSN 膜中,Mox 渗透的最大累积量(%)由 CSM1 显示(57.79%);而在载药交联 CSN 膜中,CSM18 在 24 小时内显示出最高的药物渗透(62.87%)。体外研究了制备的薄膜对金黄色葡萄球菌(ATCC#6538)、铜绿假单胞菌(ATCC#9721)和两种临床分离的耐甲氧西林金黄色葡萄球菌(MRSA)的抗菌效果。CSN 薄膜对所有选定的菌株均具有优异的抗菌效果,其抗菌潜力对金黄色葡萄球菌最高。综上所述,CSN 薄膜具有良好的抗菌潜力,推荐其作为生物医学应用,用于伤口敷料。