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Misregulated E-cadherin expression associated with an aggressive brain tumor phenotype.
Laura J Lewis-Tuffin1, Fausto Rodriguez, Caterina Giannini
1Department of Cancer Cell Biology, Mayo Clinic, Jacksonville, Florida, United States of America.
Plos One
|November 10, 2010
Summary
E-cadherin, typically found in epithelial cells, is abnormally expressed in some glioblastomas (GBM). This unexpected E-cadherin expression in GBM correlates with poor prognosis and increased tumor growth and migration.
Area of Science:
- Cell Biology
- Neuro-oncology
- Molecular Biology
Background:
- Cadherins are crucial for cell-cell adhesion and motility, regulating cell fate during tissue development.
- Cadherin switching is implicated in epithelial tumor progression, invasion, and metastasis.
- E-cadherin, a key cadherin, is minimally expressed in normal brain tissue.
Purpose of the Study:
- To investigate the role and clinical significance of E-cadherin expression in glioblastomas (GBM).
- To explore the functional impact of E-cadherin in GBM cell behavior.
Main Methods:
- Retrospective analysis of E-cadherin expression in glioblastoma patient samples.
- Western blotting to assess E-cadherin in human GBM cell lines (xenografts and conventional culture).
- Orthotopic implantation of GBM xenografts in mice and in vitro studies with ShRNA knockdown.
Main Results:
- E-cadherin expression was identified in a subset of glioblastomas, particularly those with epithelial differentiation.
- GBM E-cadherin expression correlated with unfavorable clinical outcomes.
- E-cadherin expression in GBM xenografts enhanced invasiveness, and its knockdown in cell lines reduced proliferation and migration.
Conclusions:
- Abnormal E-cadherin expression in a subset of GBM cells is unexpectedly linked to tumor growth and migration.
- E-cadherin may represent a novel therapeutic target for aggressive brain tumors.
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