在体外模拟胃消化过程中,Ovomucin-Complex的聚合-脱聚合行为及其与尿酶的结合的动态变化
Yanqing Wan1, Zhiman Xu1, Shengnan Zhu1
1College of Food Science and Engineering, Northwest A&F University, Yangling, PR China.
International journal of biological macromolecules
|May 12, 2024
概括
卵白中的Ovomucin-Complex在酸性条件下形成聚合物,抵抗消化. 这种未消化的复合体对尿酶具有很高的亲和力,这表明有可能成为对Helicobacter pylori的人工粘液屏障.
科学领域:
- 生物化学 生物化学
- 材料科学 材料科学 材料科学
- 微生物学 微生物学
背景情况:
- 来自蛋白的Ovomucin-Complex具有类似于胃粘素的特性.
- 胃粘素在形成胃内的保护性物理屏障方面发挥着至关重要的作用.
研究的目的:
- 在模拟的胃消化过程中调查Ovomucin-Complex的结构,质和结合变化.
- 评估Ovomucin-Complex作为对Helicobacter pylori感染的物理屏障的潜力.
主要方法:
- 高性能液体染色学 (HPLC) 用于结构分析.
- 同焦激光扫描显微镜 (CLSM) 用于结构可视化.
- 风学测量以评估材料属性.
- 使用KD值确定结合亲和力.
主要成果:
- 极其酸性pH (2.0) 诱导了Ovomucin-Complex聚合,增强了对素消化的抵抗力.
- 大多数Ovomucin-Complex结构和凝特性在消化后都保留了.
- 在酸性条件下和消化过程中观察到减少了疏水性相互作用.
- 未消化的Ovomucin-Complex对Helicobacter pylori抗原的尿酸酶具有很高的亲和力 (KD = 5.0 ± 3.2 nm).
结论:
- 在胃条件下,Ovomucin-Complex形成了一个稳定的聚合物,抵抗消化.
- 未消化的Ovomucin-Complex表现出与尿酶的显著结合.
- 这些发现表明Ovomucin-Complex是开发人工粘液屏障以对抗Helicobacter pylori感染的有希望的候选人.
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