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Genes that distinguish physiological and pathological angiogenesis.

Steven Seaman¹, Janine Stevens, Mi Young Yang

¹Tumor Angiogenesis Section, Mouse Cancer Genetics Program, National Cancer Institute at Frederick, Frederick, MD 21702, USA.

|June 15, 2007

Summary

Researchers compared gene expression in normal and tumor blood vessels. Tumor blood vessels show unique gene expression patterns, suggesting new targets for cancer therapies.

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Area of Science:

Vascular biology
Cancer research
Transcriptomics

Background:

Understanding the normal blood vessel transcriptome is crucial.
Malignant cells can alter the tumor microenvironment, including vasculature.

Purpose of the Study:

To characterize the normal vasculature transcriptome.
To identify gene expression differences in tumor endothelium compared to normal and regenerating endothelium.
To explore potential targets for tumor-specific therapies.

Main Methods:

Comparative gene expression analysis of endothelial cells.
Samples from normal tissues, tumors, and regenerating liver were used.
Transcriptome profiling was performed.

Main Results:

Organ-specific endothelial genes were identified, with 27 unique to brain vasculature.
25 transcripts were overexpressed in tumor endothelium versus normal endothelium.
13 of these tumor-specific transcripts were not found in regenerating liver vasculature.

Conclusions:

Tumor vasculature exhibits distinct gene expression profiles compared to normal and physiologically angiogenic vasculature.
Tumor-specific transcripts include cell surface molecules with unknown functions.
These findings highlight differences between physiological and pathological angiogenesis, offering potential for targeted cancer therapies.