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Published in: Breast Cancer Research and Treatment 3/2012

01-06-2012 | Preclinical study

Identification of copy number alterations associated with the progression of DCIS to invasive ductal carcinoma

Authors: Clint E. Johnson, Kylie L. Gorringe, Ella R. Thompson, Ken Opeskin, Samantha E. Boyle, Yuker Wang, Prue Hill, G. Bruce Mann, Ian G. Campbell

Published in: Breast Cancer Research and Treatment | Issue 3/2012

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Abstract

Ductal carcinoma in situ (DCIS) is a non-obligate precursor to invasive ductal carcinoma (IDC). Annotation of the genetic differences between the two lesions may assist in the identification of genes that promote the invasive phenotype. Synchronous DCIS and IDC cells were microdissected from FFPE tissue and analysed by molecular inversion probe (MIP) copy number arrays. Matched IDC and DCIS showed highly similar copy number profiles (average of 83% of the genome shared) indicating a common clonal origin although there is evidence that the DCIS continues to evolve in parallel with the co-existing IDC. Four chromosomal regions of loss (3q, 6q, 8p and 11q) and four regions of gain (5q, 16p, 19q and 20) were recurrently affected in IDC but not in DCIS. CCND1 and MYC showed increased amplitude of gain in IDC. One region of loss (17p11.2) was specific to DCIS. IDC-specific regions include genes with previous links to breast cancer progression and potential therapeutic targets such as AXL, SPHK1 and PLAUR.
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Metadata
Title
Identification of copy number alterations associated with the progression of DCIS to invasive ductal carcinoma
Authors
Clint E. Johnson
Kylie L. Gorringe
Ella R. Thompson
Ken Opeskin
Samantha E. Boyle
Yuker Wang
Prue Hill
G. Bruce Mann
Ian G. Campbell
Publication date
01-06-2012
Publisher
Springer US
Published in
Breast Cancer Research and Treatment / Issue 3/2012
Print ISSN: 0167-6806
Electronic ISSN: 1573-7217
DOI
https://doi.org/10.1007/s10549-011-1835-1

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