Profiling of molecular interactions in real time using acoustic detection

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Biosensing Technology

Background:

• Acoustic sensors utilizing resonating quartz crystals are increasingly used for quantifying clinical analytes.
• Existing quartz crystal microbalance (QCM) technology provides a foundation for acoustic biosensing.
• There is a need for enhanced acoustic sensing platforms with improved automation and user-friendliness.

Purpose of the Study:

• To introduce a novel acoustic detection technology termed resonant acoustic profiling (RAP).
• To describe the key features and advantages of the RAP technology over traditional QCM.
• To demonstrate the application of RAP for quantifying clinically relevant analytes and characterizing molecular interactions.

Main Methods:

• Development of the resonant acoustic profiling (RAP) system, building upon quartz crystal microbalance (QCM) principles.
• Integration of two- or four-channel automated sample delivery systems.
• Incorporation of in-line referencing and microfluidic sensor cassettes with pre-coated surface chemistries.

Main Results:

• Demonstrated successful quantification of myoglobin concentration using the RAP technology.
• Characterized the interaction kinetics of myoglobin binding.
• Successfully ranked enzyme-cofactor specificities, showcasing the system's versatility.

Conclusions:

• Resonant acoustic profiling (RAP) represents a significant advancement in acoustic biosensing.
• The RAP technology offers enhanced capabilities for automated, sensitive, and specific analyte quantification.
• RAP holds promise for diverse applications in clinical diagnostics and biochemical analysis.