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Detection of circulating melanoma cells by immunomagnetic cell sorting
A Benez1, A Geiselhart, R Handgretinger
1Department of Dermatology, University of Tübingen, Tübingen, Germany.
Journal of Clinical Laboratory Analysis
|September 24, 1999
Summary
This study presents a new method for detecting circulating melanoma cells in blood using immunomagnetic cell sorting. The assay reliably identifies melanoma cells but is not suitable for early metastasis detection.
Area of Science:
- Oncology
- Immunology
- Cell Biology
Background:
- Melanoma metastasis involves circulating tumor cells (CTCs).
- Accurate detection of CTCs is crucial for understanding melanoma progression.
- Current methods for CTC detection have limitations.
Purpose of the Study:
- To develop and validate a sensitive and specific method for identifying circulating melanoma cells (CMCs) in peripheral blood.
- To assess the utility of this method in melanoma patients with varying disease stages.
Main Methods:
- Immunomagnetic cell sorting using the mAb 9.2.27 antibody to enrich CMCs.
- Density gradient centrifugation for initial blood sample processing.
- Alkaline phosphatase-antialkaline phosphatase staining and light microscopy for cell identification.
Main Results:
- The assay reliably detected melanoma cells spiked at a concentration of 1 cell/mL whole blood.
- No 9.2.27-positive cells were found in healthy controls or patients with primary melanoma.
- Circulating 9.2.27-positive cells were detected in 13.6% of patients with regional lymph node metastases and 15.2% with disseminated disease.
Conclusions:
- A sensitive and specific immunocytological approach for detecting CMCs in peripheral blood has been established.
- The method is valuable for further research into the biological characteristics of CMCs.
- The current method is not suitable for the early detection of melanoma metastases.