Phenotyping single-cell motility in microfluidic confinement

Phenotyping single-cell motility in microfluidic confinement
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微流体限制中单细胞运动的表型分析

DOI:
10.1101/2021.12.24.474109
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发表时间:
2021
期刊:
--
影响因子:
--
通讯作者:
Bentley S
Bentley S
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--
文献类型:
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作者:
Bentley S

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生物体的运动轨迹是其行为和生理的动态读数。对于微生物来说,由于它们的体积小和移动快,这可能很难解决。在这里,我们设计了一种新的液滴微流体检测方法,将单个微米大小的藻类封装在封闭的区域内,从而实现对同一细胞的超长高速跟踪。比较两个模式物种-衣藻reinhardtii(淡水,2纤毛),和Pyramimonas章鱼(海洋,8纤毛),我们详细介绍了他们的高度定型,但对比鲜明的游泳行为和环境相互作用。通过测量细胞在三种运动状态(平稳向前游泳、静止、翻滚或兴奋向后游泳)之间转变的速率和概率,我们重建了这种步态切换动态的控制网络。一个简化的模型,细胞漫游循环限制再现所观察到的长期行为和空间通量,包括新的边界循环行为。最后,我们建立了一种检测方法,其中成对的液滴按需融合,一个含有一个被困的细胞,另一个含有一种扰乱细胞兴奋性的化学物质,以揭示neural微生物如何实时适应它们的运动模式。
The movement trajectories of organisms serve as dynamic read-outs of their behaviour and physiology. For microorganisms this can be difficult to resolve due to their small size and fast movement. Here, we devise a novel droplet microfluidics assay to encapsulate single micron-sized algae inside closed arenas, enabling ultralong high-speed tracking of the same cell. Comparing two model species-Chlamydomonas reinhardtii (freshwater, 2 cilia), and Pyramimonas octopus (marine, 8 cilia), we detail their highly-stereotyped yet contrasting swimming behaviours and environmental interactions. By measuring the rates and probabilities with which cells transition between a trio of motility states (smooth-forward swimming, quiescence, tumbling or excitable backward swimming), we reconstruct the control network that underlies this gait switching dynamics. A simplified model of cell-roaming in circular confinement reproduces the observed long-term behaviours and spatial fluxes, including novel boundary circulation behaviour. Finally, we establish an assay in which pairs of droplets are fused on demand, one containing a trapped cell with another containing a chemical that perturbs cellular excitability, to reveal how aneural microorganisms adapt their locomotor patterns in real-time.
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发表时间: 2021-03-03
期刊: PHYSICAL REVIEW X
影响因子: 12.5
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发表时间: 2021
期刊:
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发表时间: 2018-02-07
影响因子: 8.6
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DOI: --
发表时间: 2017
影响因子: 8.6
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