PEG10 is a transcriptional factor while TSG101 is involved in numerous cellular processes, including apoptotic resistance. Overexpression of PEG10 and TSG101 were observed in a variety of human cancers. However, their expression and clinical significance in gallbladder cancer (GBC) have not yet been identified. To understand the tumor biology of GBC at the molecular level, we examined PEG10 and TSG101 expression in 108 adenocarcinomas, 15 gallbladder polyps, 35 chronic cholecystitis tissues, and 46 peritumoral tissues by using immunohistochemistry. Overexpression of PEG10 and TSG101 was detected in gallbladder adenocarcinoma (48.1% and 47.2%, respectively). Conversely, there was less expression detected in the peritumoral tissues (19.6%), adenomatous polyps (13.3%), and gallbladder epithelium with chronic cholecystitis (5.1%) (p < 0.01, p < 0.05, and p < 0.01, respectively). Notably, the benign lesions with positive PEG10 and/or TSG101 expression showed moderately or severely atypical hyperplasia in gallbladder epithelium. The overexpression of PEG10 and TSG101 was significantly associated with differentiation, tumor mass, lymph node metastasis and invasion of adenocarcinoma. Univariate Kaplan-Meier analysis showed that overexpression of PEG10 (p = 0.041) and TSG101 (p = 0.025) was closely associated with decreased overall survival. Multivariate Cox regression analysis revealed that positive expression of PEG10 (p = 0.036) or TSG101 (p = 0.022) is a predictor of poor prognosis in gallbladder adenocarcinoma. Our study suggested that overexpression of PEG10 and TSG101 might be closely related to the carcinogenesis, progression, clinical biological behaviors, and prognosis of gallbladder adenocarcinoma.
In this study, we investigated the expressions of Msi-1 and ALDH1 in gallbladder adenocarcinoma (n=100), peritumoral tissues (n=46), adenomatous polyp (n=15), and chronic cholecystitis (n=35) using immunohistochemical method. The percentage of cases with positive Msi-1 and ALDH1 expression were significantly higher in gallbladder adenocarcinoma than that in peritumoral tissues, adenomatous polyp and chronic cholecystitis (ps < 0.01). The expression of Msi-1 and ALDH1 was significantly associated with differentiation, tumor mass, lymph node metastasis and invasion of adenocarcinoma. The expression of Msi-1 and ALDH1 was found to be highly consistent in gallbladder adenocarcinoma (p < 0.01). Univariate Kaplan-Meier analysis showed a negative correlation between Msi-1 (p=0.042) or ALDH1 (p< 0.001) expression with overall survival. The average survival time of patients with both low or no Msi-1 expression and ALDH1 expression was significantly longer than patients with the other three subtypes (p< 0.001). Multivariate Cox regression analysis showed that positive expression of Msi-1 or ALDH1 (p=0.016, p=0.006, respectively) was an independent bad-prognostic predictor in gallbladder adenocarcinoma. Our study suggested that Msi-1 and/or ALDH1 expression might be closely related to the carcinogenesis, progression, clinical biological behaviors, and prognosis of gallbladder adenocarcinoma.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.