%ABlauch, Lucas%ABlauch, Lucas%AGai, Ya%AGai, Ya%AKhor, Jian%AKhor, Jian%ASood, Pranidhi%ASood, Pranidhi%AMarshall, Wallace%AMarshall, Wallace%ATang, Sindy%ATang, Sindy%BJournal Name: Proceedings of the National Academy of Sciences; Journal Volume: 114; Journal Issue: 28; Related Information: CHORUS Timestamp: 2019-12-11 10:15:50 %D2017%IProceedings of the National Academy of Sciences %JJournal Name: Proceedings of the National Academy of Sciences; Journal Volume: 114; Journal Issue: 28; Related Information: CHORUS Timestamp: 2019-12-11 10:15:50 %K %MOSTI ID: 10027657 %PMedium: X %TMicrofluidic guillotine for single-cell wound repair studies %X

Wound repair is a key feature distinguishing living from nonliving matter. Single cells are increasingly recognized to be capable of healing wounds. The lack of reproducible, high-throughput wounding methods has hindered single-cell wound repair studies. This work describes a microfluidic guillotine for bisecting singleStentor coeruleuscells in a continuous-flow manner.Stentoris used as a model due to its robust repair capacity and the ability to perform gene knockdown in a high-throughput manner. Local cutting dynamics reveals two regimes under which cells are bisected, one at low viscous stress where cells are cut with small membrane ruptures and high viability and one at high viscous stress where cells are cut with extended membrane ruptures and decreased viability. A cutting throughput up to 64 cells per minute—more than 200 times faster than current methods—is achieved. The method allows the generation of more than 100 cells in a synchronized stage of their repair process. This capacity, combined with high-throughput gene knockdown inStentor, enables time-course mechanistic studies impossible with current wounding methods.

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