Lee KT, Chang WT, Wang SN, Chuang SC, Chai CY, Hu SW. Expression of DPC4/Smad4 gene in stone-containing intrahepatic bile duct.
J Surg Oncol 2006;
94:338-43. [PMID:
16917866 DOI:
10.1002/jso.20517]
[Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND OBJECTIVES
Hepatolithiasis is etiologically related to cholangiocarcinoma. We underwent this study with an attempt to examine the expression of DPC4/Smad4 gene in stone-containing intrahepatic bile ducts (IHD) and intrahepatic cholangiocarcinoma (ICC).
PATIENTS AND METHODS
The immunohistochemical method and RT-PCR analysis were used to study the expression of DPC4/Smad4 gene in normal IHD, stone-containing IHD, and ICC. All the specimens were from hepatic resection.
RESULTS
The immunohistochemical study showed that all specimens from 24 normal IHD had marked expression of DPC4/Smad4 gene, while there was 4.4% (2/46) and 33.3% (3/9) loss of DPC4/Smad4 expression in stone-containing IHD and ICC, respectively. Among the specimens of stone-containing IHD, all the hyperplastic epithelial cells showed normal expression of DPC4/Smad4 gene while dysplastic epithelial cells showed 20% (2/10) loss expression of DPC4/Smad4. The RT-PCR analysis showed that the normal IHD had the highest content of DPC4/Smad4 mRNA, which was threefold and sixfold higher than that of stone-containing IHD and ICC, respectively.
CONCLUSION
Loss expression of DPC4/Smad4 gene was found both in stone-containing IHD and ICC. Dysplastic epithelium of stone-containing IHD had higher potential for malignant transformation.
Collapse