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Microenvironmental factors regulate Ly-6 A/E expression on PyV-transformed BALB/c 3T3 cells
1Department of Cell Research and Immunology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel.
Immunology Letters
|January 1, 1995
Summary
Microenvironmental factors regulate the expression of the T-cell activation protein Ly-6 A/E in tumor cells. Interferon-alpha up-regulates Ly-6 A/E, while tumor necrosis factor-alpha and laminin down-regulate it, impacting tumor progression.
Area of Science:
- Immunology
- Oncology
- Cell Biology
Background:
- Previous studies identified two murine tumor cell subpopulations based on Ly-6 A/E expression.
- High Ly-6 A/E expression correlated with increased tumorigenicity and metastasis.
- Low Ly-6 A/E expression was associated with reduced malignancy.
Purpose of the Study:
- To investigate the regulation of Ly-6 A/E expression by microenvironmental factors on A3C polyoma-virus transformed cells.
- To understand the role of Ly-6 A/E in tumor progression.
Main Methods:
- Flow cytometry for cell sorting based on Ly-6 A/E expression.
- Treatment of A3C cells with monoclonal antibodies against Ly-6 A/E.
- Exposure of A3C cells to interferon-alpha, tumor necrosis factor-alpha, and laminin.
Main Results:
- Ligation of membrane Ly-6 A/E up-regulated its expression.
- Interferon-alpha exposure also resulted in up-regulated Ly-6 A/E expression.
- Tumor necrosis factor-alpha and laminin exposure led to down-regulated Ly-6 A/E expression.
Conclusions:
- Microenvironmental factors significantly influence Ly-6 A/E expression in tumor cells.
- These findings offer insights into how microenvironment modulates tumor progression via Ly-6 A/E.