Related Experiment Videos
Cell adhesion receptor expression during melanoma progression and metastasis
I R Hart1, M Birch, J F Marshall
1Imperial Cancer Research Fund Laboratories, Lincoln's Inn Fields, London, UK.
Cancer Metastasis Reviews
|June 1, 1991
Summary
Melanoma metastasis involves cell adhesion. Increased integrins (VLA-4, VnR) and CD44 expression correlate with tumor progression, impacting metastasis and tumor nodule formation.
Area of Science:
- Oncology
- Cell Biology
- Biochemistry
Background:
- Melanoma metastasis relies on cell-cell and cell-matrix adhesion.
- Surface molecule expression, particularly adhesion receptors, can change during tumor progression.
Purpose of the Study:
- To investigate the role of cell surface adhesion receptors in melanoma metastasis.
- To correlate the expression levels of specific integrins and CD44 with melanoma progression and metastatic potential.
Main Methods:
- Characterization of human melanocyte and melanoma cell lines for integrin family surface receptors.
- Analysis of CD44 expression levels using Fluorescence-Activated Cell Sorting (FACS) in human and murine melanoma models.
- Assessment of pulmonary tumor nodule formation after intravenous injection of melanoma cells with varying CD44 expression.
Main Results:
- Increased levels of VLA-4 (alpha 4 beta 1) and VnR (alpha v beta 3) integrins correlated with melanoma progression.
- A novel VnR (alpha v beta 1) was identified in a melanoma cell line, suggesting potential heterogeneity.
- Reduced CD44 expression in melanoma cells correlated with an impaired ability to form pulmonary tumor nodules.
Conclusions:
- Adhesion molecules like integrins and CD44 are critical regulators of melanoma cell dissemination.
- Understanding the regulation of these melanoma adhesion receptors offers insights into tumor spread mechanisms.
- Integrin heterogeneity may influence melanoma tumor behavior and metastatic capabilities.