通过特定站点的VHH抗体结合增强活细胞的抗原识别
Chengyuan Zhu1, Yudai Ichikawa1, Fumiyoshi Yamashita1
1Department of Drug Delivery Research, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, 606-8501, Japan.
Chembiochem : a European journal of chemical biology
|October 29, 2025
概括
使用特定位点结合的对齐抗体固定增强生物传感器中的细胞捕获效率. 这种方法可以提高抗原识别和结合能力,从而提高微设备的性能.
科学领域:
- 生物技术是生物技术.
- 生物工程是生物工程.
- 细胞生物学 细胞生物学
背景情况:
- 生物传感器和微设备越来越多地利用活细胞进行传感应用.
- 目前使用抗体涂层的细胞固定方法通常由于随机抗体定向而遭受低效的抗原识别.
- 对齐抗体固定化提供了一种提高结合效率和传感器性能的策略.
研究的目的:
- 开发一种对齐抗体不动化的方法,以增强细胞捕获.
- 调查非自然氨基酸用于特定部位抗体结合的使用.
- 评估特定细胞类型在抗体功能化的表面上的固定效率.
主要方法:
- 只有重链抗体 (VHHs) 的抗mCherry可变域的表达和净化,并对特定位点的亚齐多-氨 (AzF) 进行了整合.
- 通过点击化学,对含有AzF的VHHs与二环氧化物 (DBCO) 涂层的玻璃表面进行特定地点的结合.
- 用HeLa细胞在其表面表达mCherry的功能化表面 (mCherry涂层细胞) 和正常HeLa细胞化.
主要成果:
- 在C端,远离抗原结合部位,成功地将AzF集成到抗mCherry VHHs中的特定部位.
- 对抗mCherry VHH-AzF与DBCO涂层表面的有效结合,形成对齐的抗体层.
- 与功能化玻璃上的正常HeLa细胞相比,mCherry涂层细胞的固定性显著增加.
结论:
- 使用非自然氨基酸的特定部位抗体固定使得对齐的抗体定向.
- 对齐的抗体层增强了目标细胞的结合能力和固定效率.
- 这种方法为开发先进的基于细胞的生物传感器和微设备提供了一个强大的平台.
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