Abstract
Aim
We initiated this study in order to analyze whether the expression level of targeted receptor tyrosine kinases (RTK) is associated with the K-ras mutation status.
Methods
The expression pattern of VEGFR1, VEGFR2, VEGFR3, PDGFRα, PDGFRβ, and EGFR1 was analyzed in 93 samples of human colorectal carcinoma samples and correlated with the K-ras mutation status as identified by PCR-RFLP.
Results
VEGFR1, VEGFR2, VEGFR3, PDGFRα, PDGFRβ, and EGFR1 were expressed at relevant levels in 95%, 46%, 46%, 85%, 62%, and 82%, respectively. K-ras mutations were present in 53% (codon 12, 47%; codon 13, 6%). Expression of VEGFR1 (P = 0.0263), VEGFR2 (P = 0.0466), and PDGFRα (P = 0.0063) was significantly linked to K-ras codon 12 or 13 mutation. In addition, co-expression of VEGFR2 and PDGFRα was significantly associated with K-ras mutation (P = 0.0145).
Conclusion
Our data reveal that specific RTKs are over-expressed in K-ras mutated cancers. It needs to be addressed in prospective studies whether these patients will benefit from tyrosine kinase inhibitors more than K-ras wild-type.
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Schimanski, C.C., Zimmermann, T., Schmidtmann, I. et al. K-ras mutation status correlates with the expression of VEGFR1, VEGFR2, and PDGFRα in colorectal cancer. Int J Colorectal Dis 25, 181–186 (2010). https://doi.org/10.1007/s00384-009-0843-7
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DOI: https://doi.org/10.1007/s00384-009-0843-7