title: Expression and prognostic value of PRL-3 in human intrahepatic cholangiocarcinoma.
abstract: Phosphatase of regenerating liver (PRL)-3 is involved in the metastasis of various tumors, but the expression of PRL-3 and its possible role in primary intrahepatic cholangiocarcinoma (ICC) has not been reported yet. In this study, we assessed the expression levels of PRL-3 by immunohistochemistry in 102 primary ICC samples, 62 matched lymph node metastases (LNM) and 102 adjacent normal liver tissues. Then we investigated the relationship between PRL-3 expression and clinicopathologic factors. Survival analysis was performed to determine the prognostic significance of PRL-3 expression in ICC. Immunochemistry results suggested PRL-3 expression was negative or weak in non-neoplastic intrahepatic bile ducts of adjacent liver tissue. In primary lesion and LNM high PRL-3 expression was frequently detected. Furthermore, the rate of high PRL-3 expression in LNM was higher than that in primary lesion (80.6% vs. 47.1%, P < 0.05). High expression of PRL-3 in primary tumors was significantly associated with TNM (P < 0.001), T stage (P < 0.001), vascular invasion (P = 0.002), and LNM (P < 0.001). Survival analysis results with Kaplan-Meier method and Cox proportional hazard model indicated high expression of PRL-3 was correlated with decreased overall survival and was an independent prognostic marker of overall survival. Thus, our results suggested high expression of PRL-3 was correlated with progression and metastasis of ICC and indicated negative prognostic impact. PRL-3 might serve as a novel prognostic marker for patients with ICC.
authors.affiliation: Department of Gastroenterology, Provincial Hospital Affiliated to Shandong University, 324 Jingwu Weiqi Road, Jinan, 250021, People's Republic of China.
authors.forename: Yijun
authors.initials: Y
authors.lastname: Xu
authors.forename: Mingchen
authors.initials: M
authors.lastname: Zhu
authors.forename: Shuhong
authors.initials: S
authors.lastname: Zhang
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.forename: Chengyong
authors.initials: C
authors.lastname: Qin
mesh_terms: D000328:Adult; D000368:Aged; D001650:Bile Duct Neoplasms / Q000378:metabolism* / Q000401:mortality / Q000473:pathology; D001653:Bile Ducts, Intrahepatic / Q000378:metabolism* / Q000473:pathology; D014408:Biomarkers, Tumor / Q000032:analysis*; D018281:Cholangiocarcinoma / Q000378:metabolism* / Q000401:mortality / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D053208:Kaplan-Meier Estimate; D008207:Lymphatic Metastasis / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000096:biosynthesis*; D011379:Prognosis; D016016:Proportional Hazards Models; D017027:Protein Tyrosine Phosphatases / Q000096:biosynthesis*
chemical_list: D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins; C484730:PTP4A3 protein, human; D017027:Protein Tyrosine Phosphatases