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Identification of gains and losses of DNA sequences in primary bladder cancer by comparative genomic hybridization
Author(s) -
Kallioniemi Anne,
Kallioniemi OlliP.,
Citro Gil,
Sauter Guido,
Devries Sandy,
Kerschmann Russell,
Caroll Peter,
Waldman Fred
Publication year - 1995
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.2870120309
Subject(s) - comparative genomic hybridization , biology , carcinogenesis , chromosome , bladder cancer , malignancy , genetics , metaphase , cancer , cancer research , gene duplication , genomic dna , cytogenetics , gene
Comparative genomic hybridization (CGH) makes it possible to detect losses and gains of DNA sequences along all chromosomes in a tumor specimen based on the hybridization of differentially labeled tumor and normal DNA to normal human metaphase chromosomes. In this study, CGH analysis was applied to the identification of genomic imbalances in 26 bladder cancers in order to gain information on the genetic events underlying the development and progression of this malignancy. Losses affecting 11p, 11q, 8p, 9, 17p, 3p, and 12q were all seen in more than 20% of the tumors. The minimal common region of loss in each chromosome was identified based on the analysis of overlapping deletions in different tumors. Gains of DNA sequences were most often found at chromosomal regions distinct from the locations of currently known oncogenes. The bands involved in more than 10% of the tumors were 8q21, 13q21‐q34, 1q31, 3q24‐q26, and 1p22. In conclusion, these CGH data highlight several previously unreported genetic alterations in bladder cancer. Further detailed studies of these regions with specific molecular genetic techniques may lead to the identification of tumor suppressor genes and oncogenes that play an important role in bladder tumorigenesis.