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Clinical implications of chromosomal abnormalities in gastric adenocarcinomas
Author(s) -
Wu ChewWun,
Chen GenDer,
Fann Cathy S.J.,
Lee Anna F.Y.,
Chi ChinWen,
Liu Jacqueline M.,
Weier Ulli,
Chen JeouYuan
Publication year - 2002
Publication title -
genes, chromosomes and cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.754
H-Index - 119
eISSN - 1098-2264
pISSN - 1045-2257
DOI - 10.1002/gcc.10106
Subject(s) - comparative genomic hybridization , malignancy , biology , cancer , cancer research , genetics , pathogenesis , gene , pathology , genome , medicine , immunology
Gastric carcinoma (GC) is one of the most common malignancies worldwide and has a very poor prognosis. Genetic imbalances in 62 primary gastric adenocarcinomas of various histopathologic types and pathologic stages and six gastric cancer–derived cell lines were analyzed by comparative genomic hybridization, and the relationship of genomic abnormalities to clinical features in primary GC was evaluated at a genome‐wide level. Eighty‐four percent of the tumors and all six cell lines showed DNA copy number changes. The recurrent chromosomal abnormalities including gains at 15 regions and losses at 8 regions were identified. Statistical analyses revealed that gains at 17q24‐qter (53%), 20q13‐qter (48%), 1p32–p36 (42%), 22q12‐qter (27%), 17p13‐pter (24%), 16p13‐pter (21%), 6p21‐pter (19%), 20p12‐pter (19%), 7p21‐pter (18%), 3q28‐qter (8%), and 13q13–q14 (8%), and losses at 18q12‐qter (11%), 3p12 (8%), 3p25‐pter (8%), 5q14–q23 (8%), and 9p21‐p23 (5%), are associated with unique patient or tumor‐related features. GCs of differing histopathologic features were shown to be associated with distinct patterns of genetic alterations, supporting the notion that they evolve through distinct genetic pathways. Metastatic tumors were also associated with specific genetic changes. These regions may harbor candidate genes involved in the pathogenesis of this malignancy. © 2002 Wiley‐Liss, Inc.