Chitosan surface-modified bovine serum albumin-oleic acid self-assembled complexes: Improving the thermal stability, controlled release and bioaccessibility of fucoxanthin

化学 牛血清白蛋白 Zeta电位 生物利用度 壳聚糖 热稳定性 色谱法 化学工程 生物化学 有机化学 纳米颗粒 生物信息学 生物 工程类
作者
Huiying Kuang,Liyuan Ma,Yuanjie Guo,Yixiang Liu
出处
期刊:Food Hydrocolloids [Elsevier]
卷期号:151: 109796-109796 被引量:1
标识
DOI:10.1016/j.foodhyd.2024.109796
摘要

Fucoxanthin (FUCO) is a marine xanthophyll carotenoid with widespread potential physiological functions. However, poor water solubility and chemical instability limit FUCO's processing adaptability and bioavailability. In this study, chitosan surface-modified bovine serum albumin (BSA)-oleic acid (OA) self-assembled complexes were fabricated to improve the thermal stability as well as the controlled release and bioaccessibility of FUCO during gastrointestinal digestion. The results showed that glucose-grafted chitosan (GGC) could surface modify BSA-OA complexes by non-covalent affinity adhesion, resulting in a stable hydrophilic dispersion system with a polydispersity index <0.25 and a Zeta potential > −20 mV. Fourier transform infrared spectroscopy and transmission electron microscope observations revealed that GGC covered the surface of BSA-OA particles through hydrogen bonding, hydrophobic and electrostatic interactions. The GGC-BSA-OA delivery system captured FUCO with >88.00% encapsulation efficiency. Additionally, embedding FUCO in the GGC-modified BSA-OA complex improved its thermal stability. In vitro, gastrointestinal digestion simulations showed that the GGC-modified protein shell had a controlled-release effect on FUCO, which prevented acidic pH from destroying FUCO due to premature release during gastric digestion and released it during intestinal digestion. As expected, GGC-BSA-OA, an encapsulated carrier, dramatically improved the FUCO's digestive stability (retention rate >74.00%), bioaccessibility (>54.42%), and micellization rate (>70.00%) in simulated gastrointestinal digestion. These findings suggested that GGC-BSA-OA as a delivery vehicle could effectively improve FUCO's thermal processing stability and absorbability.
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