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Detection and Isolation of Circulating Melanoma Cells using Photoacoustic Flowmetry
Published on: November 25, 2011
Optical Photoacoustic Detection of Circulating Melanoma Cells In Vitro.
G Gutiérrez-Juárez1, S K Gupta, Ryan M Weight
1Division de Ciencias e Ingenierias Campus Leon, Universidad de Guanajuato, Leon, Guanajuato 37150, Mexico, Department of Biological Engineering, University of Missouri, Columbia, MO 65211, USA.
International Journal of Thermophysics
|August 24, 2010
Summary
This study introduces a novel photoacoustic (PA) system for detecting circulating melanoma cells. The system achieves a detection threshold of a single cell, offering a new method for early cancer screening.
Area of Science:
- Biomedical Engineering
- Optical Physics
- Cancer Diagnostics
Background:
- Early detection of circulating melanoma cells is crucial for effective metastatic disease management.
- Current methods for detecting circulating tumor cells can be limited in sensitivity and specificity.
- Melanoma's unique thermoelastic properties offer a potential target for novel detection strategies.
Purpose of the Study:
- To investigate the sensitivity of a photoacoustic (PA) system for detecting circulating melanoma cells.
- To leverage the thermoelastic properties of melanoma for cell identification.
- To establish an in vitro system for assessing melanoma cell presence in biological fluids.
Main Methods:
- Utilized photoacoustic (PA) excitation with an optical transducer to detect cells in vitro.
- Employed a laser system (Nd:YAG/OPO) for excitation at 532 nm and 620 nm (10 ns pulses).
- Developed a custom flow chamber and an optical stress transducer to detect PA pressure waves from melanoma cells (HS 936 line).
Main Results:
- Achieved a detection threshold of approximately one individual melanoma cell.
- Demonstrated effective detection of melanoma cells in Tyrode's buffer with varying concentrations and in the presence of white blood cells.
- Validated the sensitivity of the PA detection mechanism for melanoma cells.
Conclusions:
- The developed PA system shows high sensitivity for detecting circulating melanoma cells.
- This technology holds potential for screening blood samples for cancerous melanoma, aiding in metastatic disease detection.
- The findings suggest an unprecedented method for non-invasive cancer screening.
