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Published in: Molecular Cancer 1/2011

Open Access 01-12-2011 | Research

Cyr61/CCN1 signaling is critical for epithelial-mesenchymal transition and stemness and promotes pancreatic carcinogenesis

Authors: Inamul Haque, Smita Mehta, Monami Majumder, Kakali Dhar, Archana De, Douglas McGregor, Peter J Van Veldhuizen, Sushanta K Banerjee, Snigdha Banerjee

Published in: Molecular Cancer | Issue 1/2011

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Abstract

Background

Despite recent advances in outlining the mechanisms involved in pancreatic carcinogenesis, precise molecular pathways and cellular lineage specification remains incompletely understood.

Results

We show here that Cyr61/CCN1 play a critical role in pancreatic carcinogenesis through the induction of EMT and stemness. Cyr61 mRNA and protein were detected in the early precursor lesions and their expression intensified with disease progression. Cyr61/CCN1 expression was also detected in different pancreatic cancer cell lines. The aggressive cell lines, in which the expressions of mesenchymal/stem cell molecular markers are predominant; exhibit more Cyr61/CCN1 expression. Cyr61 expression is exorbitantly higher in cancer stem/tumor initiating Panc-1-side-population (SP) cells. Upon Cyr61/CCN1 silencing, the aggressive behaviors are reduced by obliterating interlinking pathobiological events such as reversing the EMT, blocking the expression of stem-cell-like traits and inhibiting migration. In contrast, addition of Cyr61 protein in culture medium augments EMT and stemness features in relatively less aggressive BxPC3 pancreatic cancer cells. Using a xenograft model we demonstrated that cyr61/CCN1 silencing in Panc-1-SP cells reverses the stemness features and tumor initiating potency of these cells. Moreover, our results imply a miRNA-based mechanism for the regulation of aggressive behaviors of pancreatic cancer cells by Cyr61/CCN1.

Conclusions

In conclusion, the discovery of the involvement of Cyr61/CCN1 in pancreatic carcinogenesis may represent an important marker for PDAC and suggests Cyr61/CCN1 can be a potential cancer therapeutic target.
Appendix
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Metadata
Title
Cyr61/CCN1 signaling is critical for epithelial-mesenchymal transition and stemness and promotes pancreatic carcinogenesis
Authors
Inamul Haque
Smita Mehta
Monami Majumder
Kakali Dhar
Archana De
Douglas McGregor
Peter J Van Veldhuizen
Sushanta K Banerjee
Snigdha Banerjee
Publication date
01-12-2011
Publisher
BioMed Central
Published in
Molecular Cancer / Issue 1/2011
Electronic ISSN: 1476-4598
DOI
https://doi.org/10.1186/1476-4598-10-8

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