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Targeted cell immobilization by ultrasound microbeam
Jungwoo Lee1, Changyang Lee, Hyung Ham Kim
1Department of Biomedical Engineering, NIH Resource Center for Medical Ultrasonic Transducer Technology, University of Southern California, Los Angeles, California 90089, USA. jungwool@usc.edu
Biotechnology and Bioengineering
|February 18, 2011
Summary
Researchers developed acoustic microbeam technology to trap and manipulate single cells. This method uses focused ultrasound to precisely control cell positions, advancing cellular biomechanics and adhesion studies.
Area of Science:
- Biophysics
- Cellular Mechanics
- Acoustic Manipulation
Background:
- Cellular responses to mechanical stress are crucial for understanding mechanotransduction.
- Existing methods for cell manipulation often involve physical trapping or immobilization.
- Investigating cellular biomechanics requires precise control over applied forces.
Purpose of the Study:
- To develop and demonstrate a novel acoustic trapping technique for precise cellular manipulation.
- To investigate the feasibility of using ultrasound microbeams for immobilizing and displacing biological cells.
- To explore the potential applications of this technology in studying cell adhesion and mechanobiology.
Main Methods:
- Utilized a 200 MHz focused ultrasound beam generated by a zinc oxide (ZnO) transducer to create a 2D acoustic trap.
- Immobilized a 10 µm human leukemia cell (K-562) within the acoustic trap.
- Mechanically translated the transducer to displace the trapped cell laterally and analyzed its motion trajectory.
Main Results:
- Successfully demonstrated 2D acoustic trapping of a human leukemia cell using ultrasound microbeams.
- Observed that the trapped cell exhibited retracting motion similar to lipid droplets under acoustic forces.
- Validated the precision and controllability of the acoustic trapping system for single-cell manipulation.
Conclusions:
- Acoustic microbeam technology offers a viable method for precise, non-invasive single-cell manipulation.
- This technique has significant potential for advancing studies in cellular biomechanics, mechanotransduction, and cell adhesion.
- The developed system can serve as a valuable tool for investigating interactions between different cell types, such as white blood cells and endothelial cells.
