Droplet-Based Microfluidics Methods for Detecting Enzyme Inhibitors

Area of Science:

• Biochemistry
• Analytical Chemistry
• Bioengineering

Background:

• Microfluidic devices offer significant advantages for biochemical assays due to miniaturization.
• Sub-nanoliter droplet technology drastically reduces reagent consumption compared to conventional methods.
• Enzyme kinetics and inhibition assays are crucial for drug discovery and biochemical research.

Purpose of the Study:

• To describe the design, fabrication, and operation of a microfluidic device for enzyme kinetics and inhibition assays.
• To demonstrate the utility of droplet microfluidics for screening compound libraries.
• To integrate droplet microfluidics with high-performance liquid chromatography (HPLC) for natural product extract analysis.

Main Methods:

• Design and fabrication of a droplet microfluidic device.
• Performing enzyme kinetics and enzyme inhibition assays within sub-nanoliter droplets.
• Coupling the microfluidic system with HPLC for online screening of eluted compounds.
• Screening of small compound libraries and natural extracts.

Main Results:

• Successful implementation of enzyme kinetics and inhibition assays in a microfluidic droplet format.
• Demonstrated efficiency in screening compound libraries with reduced reagent volumes.
• Effective coupling of HPLC with droplet microfluidics for analyzing complex mixtures.
• Identification of potential enzyme inhibitors from natural extracts.

Conclusions:

• Droplet microfluidic technology provides a powerful platform for high-throughput biochemical assays.
• The developed system enables efficient screening of enzyme inhibitors from diverse sources.
• Integration with HPLC expands the application of microfluidics for natural product drug discovery.