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JoVE Encyclopedia of Experiments
Microbiology
在微流控系统中以单细胞分辨率追踪细菌生长
在微流控系统中以单细胞分辨率追踪细菌生长
Encyclopedia of Experiments
Microbiology
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Encyclopedia of Experiments Microbiology
Tracking Bacterial Growth at Single-Cell Resolution in a Microfluidic System

在微流控系统中以单细胞分辨率追踪细菌生长

Protocol
251 Views
02:53 min
November 7, 2025
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Please note that some of the translations on this page are AI generated. Click here for the English version.

Transcript

从安装在倒置荧光显微镜舞台上的微流控装置开始。

该器件由具有水平供电通道的聚合物芯片组成。每个通道内衬有一系列狭窄沟槽,一端密封,设计用来将细菌细胞限制成线性链。

沟槽内存在非运动的细菌细胞,表达荧光蛋白,使其能够被可视化。

每个供给通道都连接到注射器泵,以受控流量输送富含养分的培养基。

启动流动,使介质扩散到沟槽中,支持细菌生长。

受限的细菌细胞在沟槽内分裂,形成后代链。

沟槽设计确保开口端的新电池被冲刷干净,从而实现对最古老电池的长期追踪。

拍摄沟槽随时间变化的图像,以追踪单个细菌细胞的生长和分裂。

通过将PDMS两侧的盖玻璃贴在舞台插入件底部,小心地将已加载设备安装到舞台插入件上。将级插入装置组件倒置,使PDMS朝上,并将其放置在软质表面,如无尘擦拭器。

将一相注射器泵的流量调整为每分钟35微升。然后一次只穿一条通道,插入进水针和通往废水烧杯的出口针。目视检查设备是否有泄漏后,检查出口管道是否有多余细胞,这些细胞在中质半月板中呈现出浑浊条纹,这些细胞会缓慢向废液烧杯方向移动。

设备运行约15分钟后,将一相注射器泵设置为每分钟1.5微升,并暂停流量。将整个泵和设备带到倒置荧光显微镜,以每分钟1.5微升的速度重新启动一级培养液流动。小心地将带有该装置的舞台插入件安装到显微镜上,必要时用胶带布线以布线进出口管。

找到设备上适合成像的位置,并按需要开始成像。注意,这些细胞通常需要数小时读取稳态、指数相位增长,成像的开始可根据需要延迟,以便在平衡期后开始成像。

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