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Fabrication of Multilayer Microfluidic Arrays for Passive, Efficient DNA Trapping and Profiling
Christine M O'Keefe1, Tza-Huei Jeff Wang2
1Johns Hopkins University, Whiting School of Engineering, Department of Biomedical Engineering, Baltimore, MD, USA.
Methods in Molecular Biology (Clifton, N.J.)
|June 10, 2023
Summary
This study presents a novel microfluidic device for efficiently trapping rare cell-free DNA molecules. This technology enhances the detection of cancer biomarkers for noninvasive diagnostics and monitoring.
Area of Science:
- Biomedical Engineering
- Molecular Biology
- Oncology
Background:
- Cell-free DNA (cfDNA) in blood plasma contains cancer biomarkers.
- Detecting cfDNA offers potential for noninvasive cancer diagnostics and monitoring.
- The extreme rarity of cfDNA poses significant detection challenges.
Purpose of the Study:
- To develop a microfluidic device for efficient trapping of single cfDNA molecules.
- To enable sensitive detection of tumor-specific biomarkers in patient blood samples.
Main Methods:
- Fabrication of a novel microfluidic device.
- Utilizing a passive, geometric manipulation strategy for DNA molecule trapping.
- Single DNA molecule isolation within microfluidic chambers.
Main Results:
- The microfluidic device demonstrates efficient trapping of single DNA molecules.
- The passive strategy effectively isolates target cfDNA for downstream analysis.
Conclusions:
- The developed microfluidic device shows promise for sensitive detection of cancer biomarkers.
- This technology could advance noninvasive cancer diagnostics and therapeutic monitoring.
