食品科学 ›› 2023, Vol. 44 ›› Issue (11): 48-56.doi: 10.7506/spkx1002-6630-20220722-261

• 食品工程 • 上一篇    

超声波辅助木犀草素处理对β-乳球蛋白结构及致敏性的影响

王梯梯,王阳,邹琳,刘俊,邵艳红,涂宗财   

  1. (1.江西师范大学生命科学学院,国家淡水鱼加工技术研发专业中心,江西 南昌 330022;2.南昌大学 食品科学与技术国家重点实验室,江西 南昌 330047)
  • 发布日期:2023-06-30
  • 基金资助:
    国家自然科学基金地区科学基金项目(31960457);江西省自然科学基金青年基金项目(20202BABL215027); 江西省技术创新引导类计划项目(20212AEI91001)

Effect of Ultrasound-Assisted Luteolin Treatment on the Structure and Allergenicity of β-Lactoglobulin

WANG Titi, WANG Yang, ZOU Lin, LIU Jun, SHAO Yanhong, TU Zongcai   

  1. (1. National R&D Center for Freshwater Fish Processing, College of Life Sciences, Jiangxi Normal University, Nanchang 330022, China; 2. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China)
  • Published:2023-06-30

摘要: β-乳球蛋白(β-lactoglobulin,BLG)可诱发严重的牛乳过敏反应,通过超声波辅助木犀草素(luteolin,LUT)对BLG进行处理,探究其结构和致敏性的变化规律。通过傅里叶变换红外光谱、圆二色光谱、紫外吸收光谱、荧光光谱等技术研究一次或二次超声波辅助LUT处理对BLG结构的影响;采用酶联免疫吸附测试、细胞实验对其致敏性变化进行评价。结果表明:超声波处理前后的BLG与LUT之间的主要作用力为疏水相互作用,超声波辅助LUT处理显著改变了BLG的二级结构和三级结构,降低了BLG的免疫球蛋白E结合能力以及KU812细胞中白细胞介素-6、白细胞介素-4和组胺的释放能力。因此,超声波辅助LUT处理通过改变BLG的构象表位降低其致敏性,二次超声波辅助LUT处理对BLG的降敏效果最好。

关键词: 超声;木犀草素;β-乳球蛋白;结构;致敏性

Abstract: Bovine β-Lactoglobulin (BLG) induces severe cow’s milk allergy. This research investigated the effect of ultrasound-assisted luteolin (LUT) treatment on the structure and allergenicity of BLG. The structure of the treated BLG was characterized by Fourier transform infrared (FTIR) spectroscopy, circular dichroism (CD) spectroscopy, ultraviolet (UV) absorption spectroscopy and fluorescence spectroscopy, and its allergenicity was evaluated by enzyme-linked immunosorbent assay (ELISA) and cell experiments. It was found that the major interaction force between BLG and LUT was hydrophobic interaction both before and after ultrasonic treatment. Ultrasound-assisted LUT treatment significantly altered the secondary and tertiary structures of BLG, and reduced the IgE-binding ability and the release of interleukin-6, interleukin-4 and histamine from KU812 cells. Therefore, ultrasound-assisted LUT treatment changes the conformational epitope of BLG, reducing its allergenicity, and the best effect can be achieved by secondary ultrasound-assisted LUT treatment.

Key words: ultrasound; luteolin, β-lactoglobulin; structure; allergenicity

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