Polydimethylsiloxane microstructure-induced acoustic streaming for enhanced ultrasonic DNA fragmentation on a
Lin Sun1,2, Thomas Lehnert2, Martin A M Gijs2
1Department of Fluid Control and Automation, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150000, P. R. China. lisongjing@hit.edu.cn.
Lab on a Chip
|September 30, 2022
Summary
This study introduces a novel acoustofluidic chip using polydimethylsiloxane (PDMS) microstructures for rapid DNA fragmentation. This microfluidic device enhances DNA fragmentation efficiency for next-generation sequencing (NGS) applications.
Area of Science:
- Biotechnology
- Genomic Technologies
- Microfluidics
Background:
- Next-generation sequencing (NGS) relies on efficient DNA fragmentation.
- On-chip DNA fragmentation is crucial for integrated genomic solutions.
- Existing methods may require microbubble preparation, impacting reliability.
Purpose of the Study:
- To develop and demonstrate a microfluidic chip for fast acoustofluidic DNA fragmentation.
- To investigate the use of ultrasound-actuated PDMS microstructures for DNA size reduction.
- To compare the performance of the microstructure-based device with existing methods.
Main Methods:
- Utilized ultrasound-actuated elastic polydimethylsiloxane (PDMS) microstructures in a microfluidic channel.
- Induced acoustic streaming and cavitation for DNA mechanical stretching and breaking.
- Experimentally evaluated DNA fragmentation by measuring fragment size over time.
- Validated results through simulation.
Main Results:
- Achieved rapid DNA fragmentation, reducing lambda DNA from 48.5 kbp to 3 kbp in 1 minute and 300 bp in 2.5 minutes.
- Reduced mouse genomic DNA from 1.4 kbp to 400 bp in 1 minute and 200 bp in 2.5 minutes.
- The PDMS microstructure chip demonstrated twice the fragmentation efficiency compared to chips without microstructures.
- On-chip fragmentation performance reached high-end professional standards.
Conclusions:
- The developed acoustofluidic chip with PDMS microstructures offers a highly efficient and rapid method for DNA fragmentation.
- This microbubble-free device is easier to operate and more reliable than previous approaches.
- The technology holds significant promise for integrated genomic solutions and future NGS applications.
