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Aberrations of the K-ras,p53, andAPC genes in extrahepatic bile duct cancer

2000; Wiley; Volume: 73; Issue: 3 Linguagem: Inglês

10.1002/(sici)1096-9098(200003)73

1096-9098

Takayuki Suto, Wataru Habano, Tamotsu Sugai, Noriyuki Uesugi, Osamu Funato, Senji Kanno, Kazuyoshi Saito, Shinichi Nakamura,

Colorectal Cancer Treatments and Studies

Background and Objectives The genetic alterations involved in extrahepatic bile duct (EHBD) cancer are poorly understood. Our aim was to identify aberrations of the K-ras, p53, and APC genes in EHBD cancer. Methods We investigated aberrations of these genes in 52 EHBD cancers using polymerase chain reaction (PCR) single-strand conformation polymorphism analysis, followed by direct sequence determination and a PCR restriction fragment length polymorphism assay. Results The K-ras, p53, and APC genes were mutated in 9.6%, 32.7%, and 0% of EHBD cancers, respectively. Loss of heterozygosity at the p53 and APC gene loci was identified in 15.6% and 38.5% of EHBD cancers, respectively. Conclusions Our results suggest that an unknown suppressor gene on 5q other than the APC gene may be responsible for EHBD cancer. J. Surg. Oncol. 2000;73:158–163. © 2000 Wiley-Liss, Inc.