血管内皮生长因子165基因对人胃癌细胞凋亡的影响及机制

Expression of EGFR, HER-2, VEGF in tumour tissues and their directive significance for the molecular targeting therapy of colorectal carcinoma

AIM: To detect the characteristics of epidermal growth factor receptor (EGFR), human epidermal receptor-2 (HER-2) and vascular endothelial growth factor (VEGF) expression in colorectal carcinoma (CRC) tumor tissues, and to analyze their directive significance for the molecular targeting therapy of colorectal carcinoma (CRC).

METHODS: Seventy eight patients with CRC were randomly selected, who underwent radical surgery in the department of general surgery at our hospital from May 2005 to March 2009. The SP Immunohistochemical staining was used to detect EGFR, HER-2 and VEGF protein expression in 78 CRC tumor tissue samples. And their corresponding clinical data were analysed retrospectively.

RESULTS: The expression rates of EGFR, HER-2 and VEGF protein in CRC tumour tissue were 38.5% (30/78), 53.8% (42/78) and 41.0% (32/78). Positive rates of EGFR, HER-2 and VEGF protein were closely relevant to the tumour size, knubbly invasive depth and lymph node metastasis; but not to the patient's sex, age, tumor site or histology grade. There was a stable positive relationship among EGFR, HER-2 and VEGF expression in CRC tumour tissue samples. The related coefficients were 0.421, 0.484 and 0.469 respectively (P = 0.019, 0.012 and 0.016).

CONCLUSION: The present study demonstrates that the EGFR, HER-2 and VEGF expression participate in the development, invasion and metastasis process of CRC. Their joint detection can be looked as an important symbol for judging the prognosis of CRC, screening the high-risk metastasis patients and guiding the molecular targeting therapy of colorectal carcinoma.