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Bubble Jet agent release cartridge for chemical single cell stimulation

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Abstract

We present a new method for the distinct specific chemical stimulation of single cells and small cell clusters within their natural environment. By single-drop release of chemical agents with droplets in size of typical cell diameters (d <30 μm) on-demand micro gradients can be generated for the specific manipulation of single cells. A single channel and a double channel agent release cartridge with integrated fluidic structures and integrated agent reservoirs are shown, tested, and compared in this publication. The single channel setup features a fluidic structure fabricated by anisotropic etching of silicon. To allow for simultaneous release of different agents even though maintaining the same device size, the second type comprises a double channel fluidic structure, fabricated by photolithographic patterning of TMMF. Dispensed droplet volumes are V = 15 pl and V = 10 pl for the silicon and the TMMF based setups, respectively. Utilizing the agent release cartridges, the application in biological assays was demonstrated by hormone-stimulated premature bud formation in Physcomitrella patens and the individual staining of one single L 929 cell within a confluent grown cell culture.

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Acknowledgments

We gratefully thank the German Research Foundation (DFG, ZE 527/4 and EXC 294) for financial support of this project. We also appreciate the good cooperation with the Cleanroom Service Center at IMTEK.

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Correspondence to N. Wangler.

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Wangler, N., Welsche, M., Blazek, M. et al. Bubble Jet agent release cartridge for chemical single cell stimulation. Biomed Microdevices 15, 1–8 (2013). https://doi.org/10.1007/s10544-012-9681-4

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