Lipid Microspheres for Topical Delivery of Norfloxacin: Development and Evaluation.

Aruna Murugan, Niserga Sawant, Vasanti Suvarna, Namita D Desai
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引用次数: 0

Abstract

Objective: The objective of the present study is the development and evaluation of Norfloxacin lipid microspheres as topical gels for adjunct therapy to overcome complex clinical challenges presented by moist, thermally coagulated burn wounds.

Methods: Norfloxacin-loaded lipid microspheres were prepared using the melt diffusion technique with Compritol ATO HD5, stearic acid, Tween 20, Span 80, and Transcutol P, and were incorporated into topical gels formulated with Carbopol 971P NF.

Results: Lipid microspheres exhibited an average size of 65.22+23.39 μm and a drug entrapment efficiency of 81.58 ± 0.81%. Scanning electron microscopy confirmed spherical particle morphology, while differential scanning calorimetry indicated the amorphous nature of norfloxacin within the microspheres. In vitro studies demonstrated extended release of norfloxacin, with 72.33 ± 1.46% released from microspheres and 63.18 ± 1.24% from topical gels after 8 hours. Ex vivo studies revealed 28.16 ± 0.63% of norfloxacin permeating through second-degree burnt porcine skin and 21.12 ± 1.38% through intact porcine skin after 8 hours from topical gels. In vitro antibacterial studies indicated a lower MIC₉₀ of lipid microspheres compared to the pure drug.

Conclusions: The approach shows promise in enhancing drug availability for managing burn wound complexities through improved solubility, extended release, and localized delivery. However, preclinical, clinical, and regulatory evaluations are required to establish the utility of the proposed approach. Further investigation into its application for other types of chronic or infected wounds could broaden its therapeutic potential.

脂质微球局部递送诺氟沙星:开发和评价。
目的:本研究的目的是开发和评价诺氟沙星脂质微球作为外用凝胶的辅助治疗,以克服湿热凝烧伤创面带来的复杂临床挑战。方法:采用熔融扩散技术,以Compritol ATO HD5、硬脂酸、Tween 20、Span 80、Transcutol P为原料制备载诺氟沙星脂质微球,并与caropol 971P NF配制外用凝胶。结果:脂质微球平均粒径为65.22+23.39 μm,包封效率为81.58±0.81%。扫描电镜证实了诺氟沙星的球形颗粒形态,差示扫描量热法证实了诺氟沙星在微球内的无定形性质。体外研究表明,诺氟沙星缓释时间延长,8小时后微球释放量为72.33±1.46%,外用凝胶释放量为63.18±1.24%。离体研究显示,局部用诺氟沙星凝胶8小时后,二度烧伤猪皮肤的渗透率为28.16±0.63%,完整猪皮肤的渗透率为21.12±1.38%。体外抗菌研究表明,与纯药物相比,脂质微球的MIC₉0更低。结论:该方法通过改善溶解度、延长释放和局部给药,有望提高治疗烧伤创面复杂性的药物可用性。然而,需要临床前、临床和监管评估来确定该方法的实用性。进一步研究其在其他类型的慢性或感染伤口中的应用,可以扩大其治疗潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
2.40
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