PDMS-glass hybrid microreactor array with embedded temperature control device. Application to cell-free protein...

Area of Science:

• Biotechnology
• Microfluidics
• Synthetic Biology

Background:

• Cell-free protein synthesis (CFPS) is a powerful tool for rapid protein production.
• Existing CFPS methods often lack scalability and high-throughput capabilities.
• Microfluidic devices offer precise control over reaction conditions and miniaturization.

Purpose of the Study:

• To develop a microreactor array for high-throughput cell-free protein synthesis.
• To integrate precise temperature control for optimized protein production.
• To demonstrate the system's performance using model proteins.

Main Methods:

• Fabrication of a microreactor array comprising a glass-based temperature control chip with Indium Tin Oxide (ITO) heaters and sensors.
• Micromolding of Polydimethylsiloxane (PDMS) for the reaction chamber chip with integrated flow channels.
• Assembly of the microreactor array for cell-free protein synthesis experiments.
• Utilizing Escherichia coli extract for protein synthesis.

Main Results:

• The microreactor array achieved a short thermal time constant (170 ms for heating, 3 s for cooling) due to low thermal mass.
• Successful synthesis of Green Fluorescent Protein (GFP) and Blue Fluorescent Protein (BFP) was confirmed.
• Fluorescence emission measurements validated the successful production of target proteins.

Conclusions:

• The developed microreactor array enables efficient and high-throughput cell-free protein synthesis.
• The integrated temperature control system allows for rapid and precise manipulation of reaction conditions.
• This technology holds promise for accelerated protein discovery and engineering.