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JoVE Encyclopedia of Experiments
Microbiology
使用微流控装置评估细菌运动能力
使用微流控装置评估细菌运动能力
Encyclopedia of Experiments
Microbiology
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Encyclopedia of Experiments Microbiology
Assessing Bacterial Motility Using a Microfluidic Device

使用微流控装置评估细菌运动能力

Protocol
165 Views
02:10 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

以一种微流控装置为例,该装置由一个入口管连接到由多孔通道组成的微流控腔体,用于细菌运动。

该腔室通过一个出口管连接到注射器泵的观察舱。

用缓冲液浸透腔室,去除气泡。

将设备放置在显微镜台上,并将物镜置于观察舱上方。

调整显微镜设置,清晰地观察单个细菌细胞。

将进气管放入带有荧光标记细菌的液中。

启动流动,将细菌吸入微流控腔,细菌通过多孔通道抵达观察舱。

定期对观察舱进行成像。

生成突破曲线,代表细菌通过多孔基质的比例。

将微流控从真空中取出,放置在显微镜台上。用注射器泵让它饱和蠕动缓冲液。

利用明场显微镜或相位差,调整放大倍率以显示单个细菌细胞,并聚焦于观察通道的中心。把光路设置切换到荧光显微镜。通过偏移和相机曝光时间调整对焦,以分辨单个细菌细胞,这里是100毫秒。

接着,将入口管插入含有细菌悬浮液的两毫升管中。反向泵,以每分钟一微升的流量开始抽取悬浮液。

扫描整个观测通道的横截面,每分钟记录一张图像。

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