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VEGFR-1 Expression Relates to Fuhrman Nuclear Grade of Clear Cell Renal Cell Carcinoma.
Journal of Lifestyle Medicine 2014 March
BACKGROUND: Increasing evidence suggests that vascular endothelial growth factor (VEGF) and VEGF receptor (VEGFR) 1 signaling may play an important role in the progression of pathological angiogenesis that occurs in many tumors, including renal cell carcinoma (RCC). Therapeutic targeting directed against VEGF and VEGFR-2 has been proven to be successful for metastatic clear cell RCC (CCRCC). However, the expression of VEGFR-1 and its association with prognostic parameters of CCRCC in the tumorigenesis of renal cancer remains unclear. Therefore, we examined the expression of VEGFR-1 and its prognostic significance in CCRCC.
METHODS: Immunohistochemical staining for VEGFR-1 was performed on 126 formalin-fixed paraffin-embedded CCRCC tissue samples. Six of these cases were available for Western blot analyses. The results were compared with various clinicopathologic parameters of CCRCC and patients' survival.
RESULTS: VEGFR-1 expression was detected in 59 cases (46.8%) of CCRCC. Higher VEGFR-1 expression was significantly correlated with a lower Fuhrman nuclear grade and the absence of renal pelvis invasion, although it was not related to patients' survival. Western blot analyses showed higher VEGFR-1 expression in low grade tumors.
CONCLUSION: VEGFR-1 expression may be associated with favorable prognostic factors, particularly a lower Fuhrman nuclear grade in CCRCC.
METHODS: Immunohistochemical staining for VEGFR-1 was performed on 126 formalin-fixed paraffin-embedded CCRCC tissue samples. Six of these cases were available for Western blot analyses. The results were compared with various clinicopathologic parameters of CCRCC and patients' survival.
RESULTS: VEGFR-1 expression was detected in 59 cases (46.8%) of CCRCC. Higher VEGFR-1 expression was significantly correlated with a lower Fuhrman nuclear grade and the absence of renal pelvis invasion, although it was not related to patients' survival. Western blot analyses showed higher VEGFR-1 expression in low grade tumors.
CONCLUSION: VEGFR-1 expression may be associated with favorable prognostic factors, particularly a lower Fuhrman nuclear grade in CCRCC.
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