Continuous flow real-time PCR device using multi-channel fluorescence excitation and detection

Area of Science:

• Biotechnology
• Analytical Chemistry
• Molecular Biology

Background:

• High-throughput automation is crucial for analyzing biological and environmental samples efficiently.
• Current methods often lack continuous flow and real-time analysis capabilities.
• Droplet emulsion technology offers a promising avenue for microfluidic automation.

Purpose of the Study:

• To develop a conveyor belt analog for high-throughput, real-time quantitative Polymerase Chain Reaction (qPCR).
• To create a portable, low-power device for continuous fluid stream analysis.
• To demonstrate the capabilities of droplet emulsion technology in automated qPCR.

Main Methods:

• Development of a portable device utilizing LED and fiber optic fluorescence excitation.
• Implementation of a continuous flow thermal cycler with a two-temperature zone block.
• Integration of multi-channel fluorescence detection using a 64-channel multi-anode PMT.
• Utilizing droplet emulsion technology for sample handling in 0.1-10 μL volumes.

Main Results:

• Demonstrated real-time qPCR analysis of droplets over 7 orders of magnitude concentration (1x10^1 to 1x10^7).
• Achieved dynamic range quantification up to 1x10^7 copies per 10 μL reaction.
• Reported PCR efficiencies between 90-110% and a limit of detection of 10 copies per reaction.

Conclusions:

• The developed system significantly enhances high-throughput automation for qPCR.
• Continuous flow, low-power thermal cycling, and real-time detection improve sample analysis rates.
• This technology advances the continuous sampling and analysis of biological and environmental samples.