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Wnt signaling in triple negative breast cancer is associated with metastasis.

Wnt signaling in triple negative breast cancer is associated with metastasis.

Authors :
Dey N
Barwick BG
Moreno CS
Ordanic-Kodani M
Chen Z
Oprea-Ilies G
Tang W
Catzavelos C
Kerstann KF
Sledge GW Jr
Abramovitz M
Bouzyk M
De P
Leyland-Jones BR
Source :
BMC cancer [BMC Cancer] 2013 Nov 10; Vol. 13, pp. 537. Date of Electronic Publication: 2013 Nov 10.
Publication Year :
2013

Abstract

Background: Triple Negative subset of (TN) Breast Cancers (BC), a close associate of the basal-like subtype (with limited discordance) is an aggressive form of the disease which convey unpredictable, and poor prognosis due to limited treatment options and lack of proven effective targeted therapies.<br />Methods: We conducted an expression study of 240 formalin-fixed, paraffin-embedded (FFPE) primary biopsies from two cohorts, including 130 TN tumors, to identify molecular mechanisms of TN disease.<br />Results: The annotation of differentially expressed genes in TN tumors contained an overrepresentation of canonical Wnt signaling components in our cohort and others. These observations were supported by upregulation of experimentally induced oncogenic Wnt/β-catenin genes in TN tumors, recapitulated using targets induced by Wnt3A. A functional blockade of Wnt/β-catenin pathway by either a pharmacological Wnt-antagonist, WntC59, sulidac sulfide, or β-catenin (functional read out of Wnt/β-catenin pathway) SiRNA mediated genetic manipulation demonstrated that a functional perturbation of the pathway is causal to the metastasis- associated phenotypes including fibronectin-directed migration, F-actin organization, and invasion in TNBC cells. A classifier, trained on microarray data from β-catenin transfected mammary cells, identified a disproportionate number of TNBC breast tumors as compared to other breast cancer subtypes in a meta-analysis of 11 studies and 1,878 breast cancer patients, including the two cohorts published here. Patients identified by the Wnt/β-catenin classifier had a greater risk of lung and brain, but not bone metastases.<br />Conclusion: These data implicate transcriptional Wnt signaling as a hallmark of TNBC disease associated with specific metastatic pathways.

Details

Language :
English
ISSN :
1471-2407
Volume :
13
Database :
MEDLINE
Journal :
BMC cancer
Publication Type :
Academic Journal
Accession number :
24209998
Full Text :
https://doi.org/10.1186/1471-2407-13-537