Droplet-Based Microfluidics Methods for Detecting Enzyme Inhibitors

Area of Science:

• Biochemistry
• Analytical Chemistry
• Bioanalytical Chemistry

Background:

• Microfluidic devices offer significant advantages for biochemical assays, particularly in reducing reagent consumption by five orders of magnitude compared to traditional microplate assays.
• Sub-nanoliter droplet technology within microfluidics is crucial for high-throughput biochemical analyses.
• Enzyme kinetics and inhibition assays are fundamental in drug discovery and biochemical research.

Purpose of the Study:

• To detail 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 present a method for screening potential enzyme inhibitors from natural extracts using coupled HPLC and droplet microfluidics.

Main Methods:

• Design and fabrication of a droplet microfluidic device.
• Performing enzyme kinetics and enzyme inhibition assays within sub-nanoliter droplets.
• Coupling a high-performance liquid chromatography (HPLC) system with the droplet microfluidic setup for compound separation and screening.

Main Results:

• Successful implementation of enzyme kinetics and inhibition assays in sub-nanoliter droplets.
• Demonstration of effective screening of small compound libraries using the microfluidic platform.
• Identification of potential enzyme inhibitors from crude natural extracts separated by HPLC.

Conclusions:

• Droplet microfluidics provides a powerful and efficient platform for biochemical assays, significantly reducing reagent usage.
• The described microfluidic system is suitable for high-throughput screening of enzyme inhibitors.
• Coupling HPLC with droplet microfluidics enables the analysis of complex natural extracts for bioactive compounds.