Cholangiocarcinoma (CC), a malignant neoplasm of the biliary epithelium, is usually fatal because of the difficulty in early diagnosis and navailability of effective therapy. Furthermore, little is known about the genetics and biology of CC. Only few ...
Cholangiocarcinoma (CC), a malignant neoplasm of the biliary epithelium, is usually fatal because of the difficulty in early diagnosis and navailability of effective therapy. Furthermore, little is known about the genetics and biology of CC. Only few reports concerning cytogenetic studies of CC have been published. Recently, technique of degenerate oligonucleotide primed polymerase chain reaction (DOP-PCR) comparative genomic hybridization (CGH) permits genetic imbalances screening of the entire genome using only small amounts of tumor DNA.
Thirty of CC were investigated for chromosomal aberrations by DOP-PCR CGH on microdissected tissues. The most frequently detected chromosomal gains involved 1q32-qter(26.9%), 5p13-q11(30.8%), 6p21.3-p21.2(42.3%), 7p12-q11.2(30.8%), 8p12-q12(38.5%), 11q12-q13(53.8%), 15q22-qter(50%), 16p(42.3%), 17q11.2-q21(57.7%), 18p(34.6%), 19p(42.3%), 20q(65.4%), 22q(23.1%), and Xp11.2-q13(46.2%). Chromosomal loss was observed on Xpter-p21(15.4%).
The recurrent chromosomal changes identified in this study provide candidate regions that may contain oncogenes or tumor suppressor genes respectively involved in the tumorigenesis of CC.