Bubble Jet agent release cartridge for chemical single cell stimulation

Area of Science:

• Biotechnology
• Microfluidics
• Cell Biology

Background:

• Precise chemical stimulation of individual cells is crucial for understanding cellular processes.
• Existing methods often lack the spatial resolution or control for single-cell manipulation.

Purpose of the Study:

• To develop and validate a microfluidic system for on-demand, specific chemical stimulation of single cells and small cell clusters.
• To compare the performance of silicon-based and TMMF-based microfluidic cartridges for agent release.

Main Methods:

• Fabrication of single and double-channel microfluidic cartridges using silicon etching and TMMF photolithography.
• On-demand release of sub-30 μm droplets for generating localized chemical gradients.
• Application of the system in biological assays, including hormone stimulation and single-cell staining.

Main Results:

• Demonstrated precise generation of micro-gradients for single-cell manipulation.
• Achieved distinct chemical stimulation of single cells within a confluent culture.
• Successfully stimulated premature bud formation in Physcomitrella patens using the developed cartridges.

Conclusions:

• The developed microfluidic cartridges offer a powerful tool for specific chemical stimulation of single cells.
• This technology facilitates advanced biological assays requiring precise control over cellular microenvironments.
• The system provides a versatile platform for cell biology research and drug discovery.