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Updated: May 20, 2026
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Ex Vivo Culture of Circulating Tumor Cells in the Cerebral Spinal Fluid from Melanoma Patients to Study Melanoma-Associated Leptomeningeal Disease
Published on: March 29, 2024
Circulating tumor cells in melanoma patients
Gary A Clawson1, Eric Kimchi, Susan D Patrick
1Gittlen Cancer Research Foundation and Department of Pathology, Hershey Medical Center, Pennsylvania State University, Hershey, Pennsylvania, USA. Gac4@psu.edu
Plos One
|July 26, 2012
Summary
Circulating tumor cells (CTCs) in melanoma patients showed elevated MIF and MLANA RNA levels. These CTCs, often hybrid cells, suggest a complex role in cancer progression and metastasis.
Area of Science:
- Oncology
- Cell Biology
- Molecular Diagnostics
Background:
- Circulating tumor cells (CTCs) are crucial for cancer diagnosis and prognosis.
- Previous studies found no clear link between CTC levels and disease stage in melanoma.
- Melanoma CTC detection requires sensitive methods due to low abundance and potential leukocyte contamination.
Purpose of the Study:
- To investigate the presence and characteristics of CTCs in melanoma patients.
- To identify specific RNA markers for melanoma CTCs.
- To explore the cellular nature of enriched CTCs and their potential origins.
Main Methods:
- Enrichment of CTCs from melanoma patient blood using OncoQuick centrifugation.
- Quantification of melanocyte-related RNA (TYR, MLANA, MITF, MIF) via qPCR.
- Capture and culture of CTCs on microfabricated filters for immunophenotyping.
- Analysis of CTCs from colorectal and pancreatic cancer patients for comparison.
Main Results:
- Elevated MIF and MLANA RNA levels were found in approximately one-third of melanoma patients compared to controls.
- Healthy controls showed higher TYR and MITF RNA levels, suggesting circulating immature melanocytes.
- Enriched CTC fractions contained a significant increase in leukocytes; captured CTCs exhibited hybrid phenotypes (KRT+/CD-45+).
Conclusions:
- Melanoma development may alter circulating immature melanocyte populations.
- Elevated MIF and MLANA RNA in CTCs could indicate disease progression.
- The observed CTCs resemble leukocyte/tumor cell fusion hybrids, potentially involved in metastasis.
