Expressions and clinical significance of TRIP6 in pancreatic intraepithelial neoplasia and pancreatic cancer / 中华胰腺病杂志

ABSTRACT

Objective To investigate the significance of Thyroid hormone receptor interactor 6 (TRIP6) in the development of pancreatic cancer.Methods The protein expression of TRIP6 was assessed immunohistochemically in 43 normal pancreatic (NP) tissues,18 pancreatic intraepithelial neoplasia (PanIN)tissues and 50 pancreatic ductal adenocarcinoma (PDAC) tissues using the immunohistochemical scores (IHCS) to evaluate the positivity of TRIP6 expression.And the expression of TRIP6 in different tissues was analyzed,and the correlations of TRIP6 expression in PDAC tissue with clinicopathological characteristics were analyzed.Results TRIP expression was negative or extremely low in normal pancreas,which changed from weak positivity to strong positivity with the increased degree of tissue atypia.TRIP6 was strongly expressed in PDAC.The IHCS of TRIP6 expression in NP,PanIN-1,PanIN-2,PanlN-3 and PDAC was(0.010 ±0.003),(0.029 ± 0.003),(0.055 ± 0.014),(0.090 ± 0.025) and (0.094 ± 0.030),and the differences were statistically significant (P ＜0.01).The results of paired comparison of either two of them above showed that the expression of TRIP6 in NP group was significantly lower than that in other four groups,the expression in PanIN-1 group was significantly lower than that in other three groups except NP group,the expression of PanIN-2 group was significantly lower than that of PanIN-3 group and PDAC group,and all the differences were statistically significant (all P ＜ 0.05).However,the expression of PanIN-3 group was lower than that of the PDAC group,but the difference was not statistically significant (P =0.13).The expression level of TRIP6 was associated with neural invasion (P＜0.01),lymph node metastasis (P=0.013),distant metastasis (P=0.018),differentiation of PDAC (P=0.019) and CA19-9 level(P＜0.01) in PDAC,but not with patients' gender,age,tumor size,location,vascular infiltration,infiltration depth and TNM stage.Conclusions Overexpression of TRIP6 is an early event in PDAC.TRIP6 may be involved in the whole process of PDAC development and progression.