视黄素蛋白的表达优化及其与蜡乳液在纳米涂层中的应用

Optimization of retinin expression and the application with wax emulsion in nanocoatings

摘要:

仿果蝇眼睛的抗反射纳米涂层是一种具有巨大市场潜力的生物可降解材料，可用于制造各种需要抗反射性能的光学设备。相较于物理化学法，采用微生物表达视黄素蛋白为在温和条件下制备纳米涂层提供了新思路。然而，目前抗反射涂层的关键——视黄素蛋白的表达水平较低，难以满足大规模生产。本研究通过分析筛选果蝇来源视黄素蛋白的最佳表达宿主，优化视黄素蛋白的表达水平，确定了中国仓鼠卵巢细胞（Chinese hamster ovary，CHO）是视黄素蛋白的高效表达宿主，获得纯化的视黄素蛋白。同时，探索羊毛脂纳米乳液的制备方法，确定了特定浓度视黄素蛋白及与蜡乳液的比例为16：4，纳米涂层形成体系pH为7.0，温度为30℃时，纳米涂层的抗反射能力最佳。本研究为人工绿色可降解抗反射涂层的未来应用奠定基础，提供了蛋白表达优化思路，并通过纳米涂层的成分确定及体系成分浓度、pH及温度的优化，增强了人工抗反射纳米涂层的抗反射能力并降低了生产成本。

Abstract:

Anti-reflective nanocoatings that mimic the eyes of fruit flies are biodegradable materials with great market potential for a variety of optical devices that require anti-reflective properties. Microbial expression of retinin provides a new idea for the preparation of nanocoatings under mild conditions compared to physicochemical methods. However, the current expression level of retinin, the key to anti-reflective coating, is low and difficult to meet mass production. In this study, we analyzed and screened the best expression hosts for Drosophila-derived retinin protein, and optimized its expression. Chinese hamster ovary (CHO) cells were identified as the efficient expression host of retinin, and purified retinin protein was obtained. At the same time, the preparation method of lanolin nanoemulsion was explored, and the best anti-reflective ability of the nano-coating was determined when the ratio of specific concentration of retinin protein and wax emulsion was 16:4, the pH of the nano-coating formation system was 7.0, and the temperature was 30℃. The enhanced antireflective ability and reduced production cost of artificial antireflective nanocoatings by determining the composition of nanocoatings and optimizing the concentration, pH and temperature of system components may facilitate future application of artificial green degradable antireflective coatings.