IMP3 expression in lesions of the biliary tract : a marker for high-grade dysplasia and an independent prognostic factor in bile duct carcinomas

Riener, M. O. and Fritzsche, F. R. and Clavien, P. A. and Pestalozzi, B. C. and Probst-Hensch N., and Jochum, W. and Kristiansen, G.. (2009) IMP3 expression in lesions of the biliary tract : a marker for high-grade dysplasia and an independent prognostic factor in bile duct carcinomas. Human pathology : a clinicopathologic quarterly, Vol. 40, H. 10. pp. 1377-1383.

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Official URL: http://edoc.unibas.ch/dok/A5843166

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The oncofetal protein IMP3 (insulin-like growth factor II mRNA binding protein 3) is expressed during embryogenesis and carcinogenesis. Various tumor types have been analyzed for IMP3 expression, which was exclusively found in tumor cells and correlated with increased tumor aggressiveness and reduced overall survival. To our knowledge, IMP3 expression has not been investigated in bile duct carcinomas. Using large tissue sections from resection specimens of the extrahepatic biliary tract, we analyzed IMP3 in normal bile ducts (n = 36), bile ducts with acute inflammation and reactive epithelial changes (n = 26), low-grade dysplasia (n = 9), and high-grade dysplasia (n = 11). Furthermore, IMP3 expression was assessed in bile duct carcinoma (n = 115) using clinically well-characterized tissue microarrays. The findings were correlated with clinical-pathologic parameters including survival. High-grade dysplasia was strongly positive for IMP3 in all cases studied compared with no or weak expression in normal, inflamed, and low-grade dysplastic bile ducts. Of the bile duct carcinomas 58.3% (67/115) were strongly positive for IMP3, which was associated with a higher proliferation rate (P = .004) and p53 positivity (P = .022). Patients with strong IMP3 expression had significantly reduced overall survival (P = .037) similarly to the subgroup of pT3 carcinomas (P = .007). In multivariate analysis, IMP3 expression was an independent prognostic factor for overall survival (P = .040, RR = 1.809). This comprehensive study shows that IMP3 is an independent prognostic biomarker in bile duct carcinoma. In addition, it may be a marker for high-grade dysplasia in the extrahepatic biliary tract
Faculties and Departments:09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) > Department of Epidemiology and Public Health (EPH) > Chronic Disease Epidemiology > Genetic Epidemiology of Non-Communicable Diseases (Probst-Hensch)
03 Faculty of Medicine > Departement Public Health > Sozial- und Präventivmedizin > Genetic Epidemiology of Non-Communicable Diseases (Probst-Hensch)
UniBasel Contributors:Probst Hensch, Nicole
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:24 May 2013 09:22
Deposited On:24 May 2013 09:02

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