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BMC Cancer

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Open Access 01-12-2011 | Research article

Expression of delta-catenin is associated with progression of human astrocytoma

Authors: Wang MingHao, Dong Qianze, Zhang Di, Wang YunJie

Published in: BMC Cancer | Issue 1/2011

Abstract

Background

δ-Catenin (CTNND2), which encodes a scaffold protein in humans, has been found in a few malignancies. However, the expression pattern and contribution of δ-catenin to astrocytoma progression are unclear.

Methods

We investigated δ-catenin expression in human astrocytoma samples and its function in astrocytoma cell lines using immunohistochemistry, siRNA knockdown, transfection, MTT, transwell migration and Rac1 pulldown techniques.

Results

δ-Catenin protein expression was detected in cytoplasm of astrocytoma cells by immunohistochemistry. Analysis showed that grade I astrocytoma (0%, 0/11) and glial cells from normal brain tissue exhibited negative staining. δ-Catenin expression was significantly higher in grade III-IV (35%, 29/84) compared to grade II astrocytoma cells (18%, 11/61); p < 0.01). In addition, CTNND2 overexpression promoted proliferation, invasion and Rac1 activity of U251 astrocytoma cells. Treatment of δ-catenin-transfected cells with a Rac1 inhibitor decreased Rac1 activity and invasion. δ-Catenin knockdown in U87 glioblastoma cell decreased cell proliferation, invasion and Rac1 activity.

Conclusion

The results suggest that δ-catenin expression is associated with the malignant progression of astrocytoma and promotes astrocytoma cell invasion through upregulation of Rac1 activity. δ-Catenin expression levels may serve as a useful marker of the biological behavior of astrocytoma cells.

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The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1471-2407/11/514/prepub

Title: Expression of delta-catenin is associated with progression of human astrocytoma
Authors: Wang MingHao
Dong Qianze
Zhang Di
Wang YunJie
Publication date: 01-12-2011
Publisher: BioMed Central
Published in: BMC Cancer / Issue 1/2011
Electronic ISSN: 1471-2407
DOI: https://doi.org/10.1186/1471-2407-11-514

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