Association of Target Therapy Gene Expression with Metastasizing of Clear-Cell Renal Cell Carcinoma.

We analyzed association of the levels of VEGFA, RAF1, and mTOR gene expression in the tissue of clear-cell renal cell carcinoma (ccRCC) with tumor metastasizing. Significant association with metastases was found only for VEGFA gene: OR=6.641, 95%CI=2.111-20.696. The risk of metastasis associated with reduced expression of VEGFA gene - 2.467, 95%CI=1.238-4.915. An association of VEGFA gene expression with the time to the metastasis appearance was revealed (p=0.0005). Reduced expression of the VEGFA gene is associated with reduction of the time to metastasis appearance; the median of this time is shifted from 46 to 2 months. Analysis of tumor samples with reduced expression of the VEGFA gene revealed association of increased expression of RAF1 (p=0.003) and mTOR genes (p=0.038) with metastasis.