Epithelial expression of VEGF receptors in colorectal carcinomas and their relationship to metastatic status.

Abstract

BACKGROUND:

Vascular endothelial growth factor (VEGF), originally identified as an endothelium-specific factor, can also bind to malignant cells, a mechanism by which a tumor could regulate its own progression. The biological effects of VEGF are mediated by three receptors (VEGFRs), VEGFR-1, VEGFR-2 and VEGFR-3. This study aimed at defining the expression of VEGFs in colorectal cancer (CRC) epithelia and their relationship to the metastatic status.

MATERIALS AND METHODS:

Using immunohistochemistry, the levels of tumoral immunoreactivity for VEGFs in 105 nonmetastatic, lymphogenously-metastatic and haematogenously-metastatic CRC specimens were assessed. Statistical analysis was performed using Fisher's exact probability test.

RESULTS:

VEGFR-1 immunoreactivity was positive in only 50% of the cases. However lack of expression of VEGFR-1 was significantly associated with lymphogenous and haematogenous metastases. VEGFR-2 and VEGFR-3 were expressed in all investigated specimens to varying degrees. Low levels of VEGFR-2 were significantly associated with distant metastases. No significant changes were detected in VEGFR-3 expression.

CONCLUSION:

Epithelial expression of VEGFR-1 and VEGFR-2 appear to have a protective effect against tumor aggressiveness in CRC.

• Authors: Nektaria Simiantonaki, Marios Taxeidis, Caren Jayasinghe, Charles James Kirkpatrick
• Journal: Anticancer research (Anticancer Res) 2007 Sep-Oct Vol. 27 Issue 5A Pg. 3245-50 ISSN: 0250-7005 [Print] Greece
• PMID: 17970067 (Publication Type: Journal Article)

Chemical References

• Receptors, Vascular Endothelial Growth Factor

Topics

• Colorectal Neoplasms (metabolism, pathology)
• Epithelial Cells (metabolism, pathology)
• Humans
• Immunohistochemistry
• Neoplasm Metastasis
• Receptors, Vascular Endothelial Growth Factor (biosynthesis)