scholarly journals Detection of DNA copy number alterations in cancer by array comparative genomic hybridization

2007 ◽  
Vol 9 (9) ◽  
pp. 574-584 ◽  
Author(s):  
Evi Michels ◽  
Katleen De Preter ◽  
Nadine Van Roy ◽  
Frank Speleman
Keyword(s):  
Comparative Genomic Hybridization ◽  
Copy Number ◽  
Array Comparative Genomic Hybridization ◽  
Comparative Genomic ◽  
Copy Number Alterations ◽  
Genomic Hybridization ◽  
Dna Copy Number ◽  
Dna Copy Number Alterations

Lack of DNA copy number alterations revealed with comparative genomic hybridization in fibroadenomas of the breast

2004 ◽  
Vol 153 (2) ◽  
pp. 173-176 ◽  
Author(s):  
Luciane R. Cavalli ◽  
Deborah A. Cornelio ◽  
Rubens S. Lima ◽  
Cicero A. Urban ◽  
Janice D. Rone ◽  
...  
Keyword(s):  
Comparative Genomic Hybridization ◽  
Copy Number ◽  
Comparative Genomic ◽  
Copy Number Alterations ◽  
Genomic Hybridization ◽  
Dna Copy Number ◽  
Dna Copy Number Alterations

scholarly journals Genomic Profiling by Array Comparative Genomic Hybridization Reveals Novel DNA Copy Number Changes in Breast Phyllodes Tumours

2009 ◽  
Vol 31 (1) ◽  
pp. 31-39
Author(s):  
Arno Kuijper ◽  
Antoine M. Snijders ◽  
Els M. J. J. Berns ◽  
Vibeke Kuenen-Boumeester ◽  
Elsken van der Wall ◽  
...  
Keyword(s):  
Comparative Genomic Hybridization ◽  
Copy Number ◽  
Array Comparative Genomic Hybridization ◽  
Copy Number Change ◽  
Genetic Alterations ◽  
Comparative Genomic ◽  
Genomic Profiling ◽  
Genomic Hybridization ◽  
Dna Copy Number ◽  
Copy Number Changes

Breast phyllodes tumour (PT) is a rare fibroepithelial tumour. The genetic alterations contributing to its tumorigenesis are largely unknown. To identify genomic regions involved in pathogenesis and progression of PTs we obtained genome-wide copy number profiles by array comparative genomic hybridization (CGH).DNA was isolated from fresh-frozen tissue samples. 11 PTs and 3 fibroadenomas, a frequently occurring fibroepithelial breast tumour, were analyzed. Arrays composed of 2464 genomic clones were used, providing a resolution of ~1.4 Mb across the genome. Each clone contains at least one STS for linkage to the human genome sequence.No copy number changes were detected in fibroadenomas. On the other hand, 10 of 11 PT (91%) showed DNA copy number alterations. The mean number of chromosomal events in PT was 5.5 (range 0–16) per case. A mean of 2.0 gains (range 0–10) and 3.0 losses (range 0–9) was seen per case of PT. Three cases showed amplifications. DNA copy number change was not related to PT grade. We observed recurrent loss on chromosome 1q, 4p, 10, 13q, 15q, 16, 17p, 19 and X. Recurrent copy number gain was seen on 1q, 2p, 3q, 7p, 8q, 16q, 20.In this study we used array CGH for genomic profiling of fibroepithelial breast tumours. Whereas most PT showed chromosomal instability, fibroadenomas lacked copy number changes. Some copy number aberrations had not previously been associated with PT. Several well-known cancer related genes, such as TP53 and members of the Cadherin, reside within the recurrent regions of copy number alteration. Since copy number change was found in all benign PT, genomic instability may be an early event in PT genesis.

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