Full Factorial Microfluidic Designs and Devices for Parallelizing Human Pluripotent Stem Cell Differentiation.

Area of Science:

• Stem Cell Biology
• Bioengineering
• Regenerative Medicine

Background:

• Human pluripotent stem cells (hPSCs) hold significant potential for regenerative medicine and disease modeling.
• Optimizing hPSC differentiation is challenging due to numerous influencing factors, including exogenous and endogenous signals.
• Current methods for optimizing differentiation protocols are complex and time-consuming.

Purpose of the Study:

• To develop and validate microfluidic devices for high-throughput, parallelized optimization of hPSC differentiation.
• To enable precise control over both exogenous and endogenous cellular signals during differentiation.
• To demonstrate the utility of these devices for specific cell lineage differentiation.

Main Methods:

• Fabrication of microfluidic devices using soft lithography and 3D-printed molds.
• Design of diffusion-isolated culture wells for independent control of experimental conditions.
• Implementation of three- and four-factor, two-level full factorial experimental designs.
• In situ immunocytochemistry and confocal microscopy for analysis of differentiated cells.
• Operation of devices with a single syringe pump, requiring no specialized facilities.

Main Results:

• Successful on-chip differentiation of hPSCs into the auditory neuron lineage was achieved.
• The microfluidic devices demonstrated effective control over cellular microenvironments.
• The system allows for multiplexed experimentation with various adherent cell types.
• Optimization of differentiation protocols can be significantly accelerated.

Conclusions:

• Microfluidic devices offer a powerful platform for optimizing hPSC differentiation protocols.
• These devices facilitate the investigation of complex cellular signaling pathways.
• The technology has broad applicability for cell-based research, drug screening, and therapeutic development.