Abstract：
:Little is known about the genetic changes underlying invasive tumor growth in bladder cancer. Because alterations that are linked to invasive tumor growth may be detectable in minimally invasive (stage pT1) but not in noninvasive (stage pTa) tumors, we searched for genetic differences between 28 pTa and 28 papillary pT1 bladder tumors by comparative genomic hybridization. Losses of 9q (54%), 9p (39%), and Y (28%) and gains of 1q (14%) were most prevalent in pTa tumors. These changes may play a role in the initiation of noninvasive papillary bladder cancer. The total number of aberrations was higher in pT1 tumors (6.5 +/- 5.4) than in pTa tumors (2.3 +/- 2.1; P = 0.0003), suggesting an increased genetic instability at stage pT1. Specific alterations, which were significantly more frequent in pT1 than in pTa tumors (P < or = 0.05), included deletions at 2q (36% of pT1 tumors), 8p (32%), and 11p (21%) and gains at 1q (54%), 8q (32%), 3p, 3q, 5p, 6p, and 10p (18% each). These loci are candidates for carrying genes involved in invasive tumor growth in bladder cancer. High-level amplifications at 1q22-24, 3p24-25, 6p22, 8p12, 8q21-22, 10p12.1-14, 11q13, 12q15-21, 13q31-33, Xp11-13, and Xq21-22.2 may pinpoint the location of oncogenes with relevance for bladder cancer.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Richter J,Jiang F,Görög JP,Sartorius G,Egenter C,Gasser TC,Moch H,Mihatsch MJ,Sauter Gsubject
Has Abstractpub_date
1997-07-15 00:00:00pages
2860-4issue
14eissn
0008-5472issn
1538-7445journal_volume
57pub_type
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