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Development of a Sono-Assembled, Bifunctional Soy Peptide Nanoparticle for Cellular Delivery of Hydrophobic Active Cargoes

Zhang, Yuanhong, Zhao, Mouming, Ning, Zhengxiang, Yu, Shujuan, Tang, Ning, Zhou, Feibai
Journal of agricultural and food chemistry 2018 v.66 no.16 pp. 4208-4218
antioxidants, bioavailability, curcumin, encapsulation, enzymes, food processing, hydrophobicity, lipid peroxidation, models, nanoparticles, particle size, proteolysis, sonication, soy protein, storage quality, sustainable development, toxicity, water solubility
Soy proteins are prone to aggregate upon proteolysis, hindering their sustainable development in food processing. Here, a continuous work on the large insoluble peptide aggregates was carried out, aiming to develop a new type of soy peptide-based nanoparticle (SPN) for active cargo delivery. Sono-assembled SPN in spherical appearance and core–shell structure maintained by noncovalent interactions was successfully fabricated, exhibiting small particle size (103.95 nm) in a homogeneous distribution state (PDI = 0.18). Curcumin as a model cargo was efficiently encapsulated into SPN upon sonication, showing high water dispersity (129.6 mg/L, 10⁴ higher than its water solubility) and storage stability. Additionally, the pepsin-resistant SPN contributed to the controlled release of curcumin at the intestinal phase and thus significantly improved the bioaccessibility. Encapsulated curcumin was effective in protecting glutamate-induced toxicity in PC12 cells, where the matrix SPN can simultaneously reduce lipid peroxidation and elevate antioxidant enzymes levels, innovatively demonstrating its bifunctionality during cellular delivery.