用于感染伤口新霉素递送的单宁酸交联水凝胶的实验优化

Experimental Optimization of Tannic Acid-Crosslinked Hydrogels for Neomycin Delivery in Infected Wounds.

作者信息

Chidchai Peerapat, Singpanna Kanokwan, Pengnam Supusson, Charoenying Thapakorn, Pamornpathomkul Boonnada, Patrojanasophon Prasopchai, Chaksmithanont Prin, Pornpitchanarong Chaiyakarn

机构信息

Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand.

Research and Innovation Center for Advanced Therapy Medicinal Products, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom 73000, Thailand.

出版信息

Polymers (Basel). 2025 Mar 14;17(6):770. doi: 10.3390/polym17060770.

Abstract

Wound infections pose a significant challenge in healthcare settings due to prolonged healing times and the emergence of antibiotic-resistant bacteria. Traditional wound dressings often fail to provide sustained drug release, optimal moisture retention, and effective antibacterial protection, leading to suboptimal therapeutic outcomes. This study aimed to optimize and develop neomycin-integrated hydrogels crosslinked via tannic acid (TA) for the treatment of infectious wounds. The hydrogels were optimized using a central composite experimental design. The amounts of polyvinyl alcohol (PVA, 10-20% /) and polyvinylpyrrolidone (PVP, 5-20% /) were varied and mixed with a fixed concentration of TA (1% /) as a crosslinker. The water content (%), water absorption (%), erosion (%), water vapor transmission rate (WVTR), and the mechanical properties of the hydrogels were evaluated. Neomycin was integrated in the optimized hydrogel, and the antibacterial activity against Staphylococcus aureus was studied using a time-kill analysis method. The optimal hydrogel formula contained PVA and PVP at a ratio of 20:19.89 by weight. The resulting hydrogel possessed good physical and mechanical properties and had a water content of 71.86%, water absorption of 124.96%, minimal erosion of 33.08%, and optimal WVTR of 5567 g/m/24 h. Furthermore, the hydrogel showed desirable elasticity, with a Young's modulus of 474.81 Pa and a tensile strength that could resist breakage upon application. The neomycin-integrated hydrogels inhibited bacterial growth comparably to the neomycin solution (0.5% /). Therefore, TA was proven to be a promising natural crosslinker and the optimized hydrogel was demonstrated to be a propitious platform for neomycin cutaneous application, and which could be used to treat infected wounds in the future.

摘要

由于愈合时间延长以及抗生素耐药菌的出现,伤口感染在医疗环境中构成了重大挑战。传统伤口敷料往往无法实现持续的药物释放、最佳的水分保持和有效的抗菌保护,导致治疗效果欠佳。本研究旨在优化并开发通过单宁酸(TA)交联的含新霉素水凝胶,用于治疗感染性伤口。采用中心复合实验设计对水凝胶进行优化。改变聚乙烯醇(PVA,10 - 20% /)和聚乙烯吡咯烷酮(PVP,5 - 20% /)的用量,并与固定浓度(1% /)的TA作为交联剂混合。评估了水凝胶的含水量(%)、吸水率(%)、溶蚀率(%)、水蒸气透过率(WVTR)以及力学性能。将新霉素整合到优化后的水凝胶中,采用时间 - 杀菌分析法研究其对金黄色葡萄球菌的抗菌活性。最佳水凝胶配方中PVA与PVP的重量比为20:19.89。所得水凝胶具有良好的物理和力学性能,含水量为71.86%,吸水率为124.96%,最小溶蚀率为33.08%,最佳WVTR为5567 g/m/24 h。此外,该水凝胶表现出理想的弹性,杨氏模量为474.81 Pa,拉伸强度能够在应用时抵抗破裂。含新霉素的水凝胶对细菌生长的抑制作用与新霉素溶液(0.5% /)相当。因此,TA被证明是一种有前景的天然交联剂,优化后的水凝胶被证明是新霉素皮肤应用的有利平台,并可在未来用于治疗感染伤口。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8f37/11946848/8d39084cbfb7/polymers-17-00770-g001.jpg

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