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Detection of Copy Number Alterations Using Single Cell Sequencing

Detection of Copy Number Alterations Using Single Cell Sequencing

Published on: February 17, 2017

A disposable microfluidic cassette for DNA amplification and detection.

Jing Wang¹, Zongyuan Chen, Paul L A M Corstjens

¹Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6315, USA.

|December 24, 2005

Summary

This study presents a novel microfluidic cassette for rapid point-of-care diagnostics. The device integrates polymerase chain reaction (PCR) amplification and up-converting phosphor (UPT) labeling for sensitive detection of B. cereus DNA.

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Area of Science:

Biotechnology
Analytical Chemistry
Microfluidics

Background:

Point-of-care diagnostics require rapid, sensitive, and portable detection methods.
Existing methods often involve complex laboratory procedures and equipment.
Microfluidic devices offer miniaturization and integration potential for improved diagnostics.

Purpose of the Study:

To develop and evaluate a disposable, pneumatically driven microfluidic cassette for rapid detection of specific DNA sequences.
To integrate polymerase chain reaction (PCR) amplification with up-converting phosphor (UPT) reporter particle labeling and lateral flow detection.
To utilize temperature-activated hydrogel valves for precise fluid control within the microfluidic system.

Main Methods:

Construction of a microfluidic cassette containing a PCR thermal cycler, UPT labeling chamber, hydrogel valves, and a lateral flow strip.

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Utilized temperature-activated hydrogel valves controlled by thermoelectric units for sealing and flow control.

Amplified a specific 305 bp fragment from B. cereus genomic DNA.

Labeled amplicons with UPT particles and detected them on a lateral flow strip using IR laser excitation.

Main Results:

The microfluidic cassette successfully amplified and labeled target DNA fragments.
Hydrogel valves provided effective, leakage-free, and electronically addressable flow control.
UPT reporter particles enabled sensitive detection with minimal background noise and no photobleaching.
The system demonstrated potential for rapid point-of-care testing.

Conclusions:

The developed microfluidic cassette offers a promising platform for rapid, integrated molecular diagnostics.
The combination of PCR, UPT labeling, and microfluidics enables sensitive and robust detection.
This technology has significant potential for point-of-care applications, including infectious disease diagnostics.