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Vascular gene expression in nonneoplastic and malignant brain
Stephen L Madden1, Brian P Cook, Mariana Nacht
1Genetics and Genomics, 5 Mountain Rd., Framingham, MA 01701, USA. steve.madden@genzyme.com.
The American Journal of Pathology
|July 28, 2004
Summary
Researchers identified new molecular markers, RDC1 and PV1, in brain tumor endothelial cells. These findings offer insights into glioma-induced blood-brain barrier disruption and tumor angiogenesis.
Area of Science:
- Neuro-oncology
- Molecular Biology
- Endothelial Cell Biology
Background:
- Malignant gliomas are aggressive brain tumors characterized by significant angiogenesis.
- Tumor-induced angiogenesis contributes to tumor invasion, blood-brain barrier (BBB) breakdown, and cerebral edema.
Purpose of the Study:
- To investigate the molecular mechanisms of abnormal microvasculature proliferation in malignant brain tumors.
- To identify cell-specific gene expression patterns in tumor-associated endothelial cells.
Main Methods:
- Cell-specific transcriptome analysis using Serial Analysis of Gene Expression (SAGE).
- Comparison of gene expression profiles from surgically harvested nonneoplastic and tumor-associated endothelial cells from glioma patients.
Main Results:
- Distinct gene expression patterns were observed between glioma and nonneoplastic endothelial cells.
- RDC1 (a G-protein-coupled receptor) was identified as a tumor endothelial marker, upregulated in both brain and peripheral tumor vasculature.
- PV1, a glioma-induced gene, was found to be restricted to endothelial cells and involved in tube formation, potentially enhancing BBB disruption.
Conclusions:
- RDC1 and PV1 are novel molecular markers associated with tumor endothelial cells in gliomas.
- PV1's role in endothelial cell structure may contribute to blood-brain barrier permeability.
- Further analysis of this endothelial cell gene expression database can yield deeper insights into brain vascular biology in tumors.