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Breast Cancer Res Treat. 2012 Jun;133(3):889-98. doi: 10.1007/s10549-011-1835-1. Epub 2011 Nov 4.

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

Author information

1
VBCRC Cancer Genetics Laboratory, Peter MacCallum Cancer Centre, Locked Bag 1, A'Beckett St, East Melbourne, Victoria, VIC 8006, Australia.

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.

PMID:
22052326
DOI:
10.1007/s10549-011-1835-1
[Indexed for MEDLINE]

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