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小檗碱/槲皮素共载磷脂-蛋白杂化囊泡复合水凝胶的构建及其抗菌应用
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华南理工大学食品科学与工程学院

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广东省粤港澳创新合作专项(2025A0505010009);广东省自然科学基金面上项目(2025A1515011763)


Construction of Berberine/Quercetin Co-loaded Lecithins–Protein Hybrid Vesicle Composite Hydrogels for Antibacterial Applications
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School of Food Science and Engineering,South China University of Technology

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    摘要:

    天然抗菌活性物的联合应用可通过机制互补增强功效,但活性物间显著的理化性质差异使其稳定共载与可控释放面临挑战。针对这一问题,本研究以小檗碱(Berberine, BBR)和槲皮素(Quercetin, Que)为模式活性物,利用玉米醇溶蛋白(Zein)、丝素蛋白(Silk fibroin, SF)与磷脂(Lecithins)共组装的杂化囊泡(Lecithins-Zein-Silk fibroin Hybrid Vesicles, LZSF)实现二者共载,并将其限域于氧化透明质酸(Oxidized Hyaluronic Acid, OHA)、羧甲基壳聚糖(Carboxymethyl Chitosan, CMC)和明胶(Gelatin, Gel)经席夫碱反应形成的动态水凝胶网络中,构建pH值响应型复合水凝胶。结果表明,共载杂化囊泡粒径为117.85–145.23 nm,在适宜 BBR/Que 配比下,两者包埋率均超过80%,表现出良好的共载能力。傅里叶变换红外光谱、流变学和扫描电子显微镜分析表明,复合水凝胶形成了稳定的动态交联网络,杂化囊泡均匀分布其中,CMC: Gel = 2:1时水凝胶的网络结构最优。体外释放结果显示,pH值5.5下BBR和Que的24 h累积释放率显著高于pH值7.4,表明复合水凝胶具有明显的酸响应释放特性。最优配方对痤疮丙酸杆菌表现出高效抑制作用,抑菌圈直径达24.24 mm。综上,该体系通过磷脂-蛋白杂化囊泡共载与动态水凝胶限域相结合,实现了不同极性天然活性物的高效共载、结构限域与响应释放,为天然抗菌活性物在功能食品与食品保藏中的应用提供了新思路。

    Abstract:

    The combined use of natural antibacterial bioactives offers enhanced antibacterial efficacy through complementary mechanisms; however, substantial differences in their physicochemical properties pose challenges to stable co-encapsulation and controlled release. To address this challenge, berberine (BBR) and quercetin (Que) were selected as model bioactives and co-encapsulated in hybrid vesicles (LZSF) co-assembled from Zein, silk fibroin (SF), and lecithins. The co-loaded vesicles were further confined within a dynamic hydrogel network formed by oxidized hyaluronic acid (OHA), carboxymethyl chitosan (CMC), and gelatin (Gel) through Schiff-base reactions, thereby constructing a pH-responsive composite hydrogel. The co-loaded hybrid vesicles exhibited particle sizes ranging from 117.85 to 145.23 nm, with encapsulation efficiencies of over 80% for both BBR and Que at suitable BBR/Que mass ratios, demonstrating effective co-encapsulation. FTIR spectroscopy, rheological measurements, and SEM observations indicated the formation of a stable dynamically crosslinked network, in which the hybrid vesicles were uniformly distributed. The hydrogel with a CMC/Gel mass ratio of 2:1 exhibited favorable network characteristics. In vitro release studies showed that the 24 h cumulative release of both BBR and Que at pH 5.5 was significantly higher than that at pH 7.4, demonstrating pronounced acid-responsive release behavior. The optimized composite hydrogel exhibited strong antibacterial activity against Cutibacterium acnes, with an inhibition zone diameter of 24.24 mm. Overall, the integration of lecithins–protein hybrid vesicle-mediated co-encapsulation with dynamic hydrogel confinement enabled efficient co-loading, spatial confinement, and pH-responsive release of natural bioactives with distinct polarities, providing a promising strategy for the application of natural antibacterial bioactives in functional foods and food preservation.

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  • 收稿日期:2026-10-08
  • 最后修改日期:2026-10-21
  • 录用日期:2026-10-22
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