迪恩迁移机制:促进细胞治疗产品制造中的微生物污染物的控制
Junhao Tan1,2, Jianbo Yang2, Junjie Huang2
1Medical School, Faculty of Medicine, Tianjin University, Tianjin, China.
Microsystems & nanoengineering
|January 26, 2026
概括
这项研究引入了一种新的微流体方法,用于将罕见的微生物污染物从密度细胞疗法中分离出来. 这项创新使实时无菌性测试成为可能,这对于确保先进细胞疗法的安全至关重要.
科学领域:
- 生物技术是生物技术.
- 微流体学 微流体学
- 细胞疗法制造业 细胞疗法制造业
背景情况:
- 细胞疗法产品面临着无菌性测试的挑战,原因是短的保质期和无法进行终端灭菌.
- 传统方法受到密集的细胞背景的阻碍,掩盖了罕见的微生物污染物,并且需要大量的预处理.
- 有效的微生物分离对于实时,在细胞治疗过程中的无菌性保证至关重要.
研究的目的:
- 阐明Dean流主导的迁移机制,用于连续,无标签地将微生物从细胞悬浮中分离出来.
- 为了确定迪恩迁移的有效范围,在微通道中分离污染物最小为5微米.
- 开发优化的微流体通道几何结构,以有效分离和治疗细胞的纯度.
主要方法:
- 在微通道中对Dean流主导的迁移进行系统的阐明.
- 基于粒子对通道高度比的微流体通道几何结构的设计和优化.
- 使用T细胞和形态上不同的细菌评估分离效率和纯度.
- 在超低微生物负载下使用培养基检测验证检测极限.
主要成果:
- >95%的分离效率和>96%纯度的T细胞从细菌通过优化设计实现.
- 迪恩诱导的横向迁移被证实是粒子的主要机制,ap/h<0.05.
- 在粒子流中观察到靠近惯性聚焦值的雷诺德数依赖过渡.
- 100%的微生物污染物 (>1CFU/mL) 在超低负载 (<10CFU/mL) 的检测得到证实.
结论:
- 迪恩迁移是微流体系统中微微粒子分离的验证机制.
- 开发的方法使微生物污染物从高密度细胞疗法中有效,无标签地分离出来.
- 这种方法为将微流体模块集成到封闭的CAR-T制造中为实时微生物质量控制铺平了道路.
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