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High-throughput quantitative polymerase chain reaction in picoliter droplets
Margaret Macris Kiss1, Lori Ortoleva-Donnelly, N Reginald Beer
1Raindance Technologies, 44 Hartwell Avenue, Lexington, Massachusetts 02421, USA.
Analytical Chemistry
|June 25, 2009
Summary
This study introduces a microfluidic chip for high-throughput PCR, enabling rapid detection and quantification of rare species. The platform demonstrates high sensitivity and accuracy for digital PCR applications.
Area of Science:
- Molecular Biology
- Biotechnology
- Analytical Chemistry
Background:
- Limiting dilution PCR is crucial for detecting rare species but limited by throughput.
- Current methods require analysis of numerous reactions, impacting efficiency and accuracy.
Purpose of the Study:
- To develop a high-throughput microfluidic platform for enhanced PCR analysis.
- To improve the limit of detection and accuracy in rare species quantification.
Main Methods:
- Design of a microfluidic chip encapsulating PCR reagents in picoliter droplets.
- Utilizing an oil flow for rapid cycling through denaturation and annealing zones.
- Incorporating fluorescent probes for real-time monitoring within droplets.
Main Results:
- Achieved rapid PCR amplification with 55-second cycles.
- Detected and quantified adenovirus DNA in 35 minutes at low template concentrations (0.003 pg/microL).
- Observed close agreement between experimental frequencies and Poisson statistics, confirming accuracy.
Conclusions:
- The microfluidic chip significantly enhances throughput for PCR-based detection and quantification.
- This platform offers high sensitivity and accuracy, suitable for digital PCR and limiting dilution assays.
- Demonstrated a novel approach for analyzing rare genetic targets efficiently.
