高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (11): 1999.doi: 10.7503/cjcu20160364

• 有机化学 • 上一篇    下一篇

基于糖基化反应及自组装法制备大豆分离蛋白-可溶性大豆多糖核壳结构纳米凝胶

冯纪璐, 齐军茹(), 刘倩茹   

  1. 华南理工大学食品科学与工程学院, 淀粉与植物蛋白深加工教育部工程研究中心, 广州 510640
  • 收稿日期:2016-05-20 出版日期:2016-11-10 发布日期:2016-10-09
  • 作者简介:联系人简介: 齐军茹, 女, 博士, 教授, 主要从事蛋白物性修饰及功能性多糖研究. E-mail: jrqi@scut.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 31370036)和中央高校基本科研业务费专项资金(批准号: 2015Z2119)资助

Fabrication of Soy Protein Isolate-soluble Soy Polysaccharide Core-shell Nanogels via Maillard Reaction and Self-assembly

FENG Jilu, QI Junru*(), LIU Qianru   

  1. Engineering Research Center of Starch and Vegetable Protein Processing, Ministry of Education, School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2016-05-20 Online:2016-11-10 Published:2016-10-09
  • Contact: QI Junru E-mail:jrqi@scut.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.31370036) and the Fundamental Research Funds for the Central Universities, China(No.2015Z2119)

摘要:

结合大分子拥挤环境下的糖基化反应与自组装两步法, 制备了安全而新型的具有核壳结构的纳米凝胶. 首先, 通过水相体系中的Maillard反应使亲水性大豆多糖(SSPS)共价连接到大豆分离蛋白(SPI)上形成两亲性嵌段共聚物; 然后, 在疏水聚集及静电吸引作用力的驱动下诱导接枝共聚物自组装形成SPI-SSPS纳米凝胶. 原子力显微镜与透射电子显微镜分析表明, SPI-SSPS纳米凝胶为分布均匀、 具有核壳结构的球形粒子, 以亲水性的SPI为壳, 以交联的SSPS为核; 利用圆二色光谱法与荧光光谱法表征了SPI-SSPS纳米凝胶的结构, 结果表明, SPI-SSPS纳米凝胶中蛋白的三级结构发生改变, 疏水基团暴露于蛋白表面使纳米凝胶内部形成疏水微区, 有利于荷载疏水性药物; 稳定性实验结果表明, 所制备的SPI-SSPS纳米凝胶具有环境稳定性, 在一定的pH值与生理离子强度范围内粒子基本不变, 于4 ℃能稳定储藏120 d以上. 因此, SPI-SSPS纳米凝胶在生物医药领域具有广阔的应用前景.

关键词: 纳米凝胶, Maillard反应, 自组装, 疏水聚集, 静电作用, 大豆分离蛋白, 可溶性大豆多糖

Abstract:

A “two-step” method, which involved Maillard reaction in macromolecular crowding environment and self-assembly approach, has been adopted to fabricate the novel and safe core-shell nanogels. First, amphiphilic graft copolymers were synthesized by soluble soy polysaccharide(SSPS) covalently attaching to soy protein isolate(SPI) via Maillard wet-heating reaction. Second, the resultant conjugates(SSC) were induced by both hydrophobic and electrostatic interaction to self-assemble soy protein isolate-soluble soy polysaccharide(SPI-SSPS) nanogels. Microscopic technology indicated that the SPI-SSPS nanogels were well-separated and spherical in shape with obvious core-shell structures: the hydrophilic soy polysaccharide constituted the shell and the cross-linked soy protein constituted the core. Spectroscopy investigation revealed that the tertiary structure of protein in nanogels was changed and the non-polar groups were exposed to the surface of soy protein to develop the hydrophobic compartments in the core of SPI-SSPS nanogels, which might offer a promising potential for drugs encapsulating via hydrophobic attraction. The SPI-SSPS nanogels exhibited remarkable stability against pH and NaCl concentration change, and they were pretty stable against 120 d storage at 4 ℃. All of these valuable properties provide a great potential for practical application in the field of biomedicine.

Key words: Nanogel, Maillard reaction, Self-assembly, Hydrophobic attraction, Electrostatic interaction, Soy protein isolate, Soluble soy polysaccharide

中图分类号: 

TrendMD: