The expression and prognostic value of EGFR,HER2 and HER3 in cholangiocarcinoma / 实用肿瘤学杂志

ABSTRACT

Objective The aim of this study was to observe the expression of human epidermal growth factor receptor( EG-FR),epidermal growth factor receptor 2(HER2)and epidermal growth factor receptor 3(HER3)in cholangiocarcinoma(CCA),and to explore the relationship between the expression of EGFR,HER2,HER3 and the clinicopathological features,overall survival time and proliferation of CCA patients. Methods Fifty patients with CCA who underwent surgery in our hospital from January 2009 to October 2013 were enrolled,and their adjacent tissues were also collected as controls. Immunohistochemistry and qRT-PCR were used to de-tect the expression of EGFR,HER2 and HER3 in CCA and adjacent tissues. The clinicopathological parameters of patients were col-lected and the relationship between EGFR,HER2,and HER3 expression and clinicopathological parameters of CCA was analyzed. Ka-plan-Meier survival curves were plotted,and the relationship between the expression of EGFR,HER2,and HER3 and total postopera-tive survival of 50 patients with CCA was analyzed using the Log-rank test and Cox proportional hazard model. The expression of EG-FR,HER2 and HER3 in CCA QBC939 cell line was knocked down by RNA interference assay. The knockdown effect of EGFR,HER2 and HER3 was detected by Western blot. The effect of EGFR,HER2 and HER3 on proliferation of QBC939 cells was determined by MTT assay. Results The positive expression of EGFR,HER2 and HER3 was determined in CCA tissues. The relationship analysis of clinicopathological characteristics showed that the HER2 expression was associated with CCA lymph node metastasis(P<0. 05). EG-FR and HER3 was associated with CCA lymph node metastasis and correlated with cancer differentiation(P<0. 05). The overall sur-vival of patients with EGFR,HER2 and HER3 positive was significantly lower than that of negative patients( P<0. 05). After knoc-king EGFR,HER2 and HER3 expression,the proliferation was significantly decreased in QBC939 cells(P<0. 05). Conclusion The expression of EGFR,HER2 and HER3 in CCA tissues is closely related to the overall survival of patients,and the mechanism may be related to the promotion of proliferation of CCA cells.