Zhang Xiu-Xiu, Zhang Wang-Wei, Ni Zhi-Jing, Thakur Kiran, Zhang Jian-Guo, Khan Mohammad Rizwan, Xu Wen-Di, Wei Zhao-Jun
School of Biological Science and Engineering, North Minzu University, Yinchuan 750021, People's Republic of China.
School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, People's Republic of China.
Food Chem X. 2024 Mar 7;22:101271. doi: 10.1016/j.fochx.2024.101271. eCollection 2024 Jun 30.
Recent studies have witnessed that chemical modification can improve the physicochemical and functional properties of plants' polysaccharides. Herein, we modified the natural seed dreg polysaccharides (LBSDPs) by sulfation (S-LBSDPs), phosphorylation (P-LBSDPs), and carboxymethylation (C-LBSDPs), and evaluated the chemical composition and antioxidant activity of their derivatives. Natural polysaccharides and their derivatives exhibited typical polysaccharide absorption peaks and characteristic group absorption peaks in FT-IR spectra along with maximum UV absorption. After modification, the total sugar and protein contents of the derivatives were decreased, whereas the uronic acid content was increased. Among the three derivatives, sulfated polysaccharides displayed excellent thermal stability. S-LBSDP and P-LBSDP showed the highest ABTS radical scavenging and reducing power while S-LBSDPs and C-LBSDPs showed better DPPH radical scavenging effect, and P-LBSDPs showed considerable Fe chelating ability. Our data indicate that chemical modifications can impart a positive effect on the antioxidant potential of plant-derived polysaccharides.
最近的研究表明，化学修饰可以改善植物多糖的物理化学性质和功能特性。在此，我们通过硫酸化（S-LBSDPs）、磷酸化（P-LBSDPs）和羧甲基化（C-LBSDPs）对天然种子渣多糖（LBSDPs）进行了修饰，并评估了其衍生物的化学组成和抗氧化活性。天然多糖及其衍生物在傅里叶变换红外光谱中呈现出典型的多糖吸收峰和特征基团吸收峰，同时具有最大紫外吸收。修饰后，衍生物的总糖和蛋白质含量降低，而糖醛酸含量增加。在这三种衍生物中，硫酸化多糖表现出优异的热稳定性。S-LBSDP和P-LBSDP表现出最高的ABTS自由基清除能力和还原能力，而S-LBSDPs和C-LBSDPs表现出更好的DPPH自由基清除效果，P-LBSDPs表现出相当强的铁螯合能力。我们的数据表明，化学修饰可以对植物源多糖的抗氧化潜力产生积极影响。
