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Cadherin/catenin complex: a target for antiinvasive therapy?
1Department of Radiotherapy and Nuclear Medicine, University Hospital, Gent, Belgium.
Abstract:
Invasion is a major challenge for cancer therapy. Invasion or noninvasion results from the cross talk between cancer cells and host cells, building molecular invasion-promoter and invasion-suppressor complexes. The E-cadherin/catenin invasion-suppressor complex is attractive as a target for a putative antiinvasive therapy because of its multifactorial regulation at multiple levels and sometimes in a reversible way. Mutations in the E-cadherin gene combined with loss of the wild type allele causes irreversible downregulation in some human cancers. Posttranslational and reversible downregulation may occur by tyrosine phosphorylation of beta-catenin. Phosphorylation is implicated also in transmembrane receptor signal transduction through the E-cadherin/catenin complex. Homophilic interaction with E-cadherin on another cell through a dimeric adhesion zipper, involving the HAV sequence of the first extracellular domains, is the major extracellular link of the E-cadherin/catenin complex. Intracellularly, the list of proteins that bind to or signal through the complex or one or more of its elements is growing. In vitro, insulin-like growth factor-I, and tamoxifen may upregulate the functions of the E-cadherin/catenin complex and inhibit invasion, demonstrating that this complex may serve as a target for antiinvasive therapy.
Insights
Targeting the E-cadherin/catenin complex offers a promising strategy for anti-cancer invasion therapy. This complex
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Cancer invasion is a significant obstacle in effective cancer therapy.
- The balance between molecular invasion-promoter and invasion-suppressor complexes dictates cancer cell invasiveness.
- The E-cadherin/catenin complex acts as a key invasion-suppressor complex with multifactorial regulation.
Purpose of the Study:
- To explore the E-cadherin/catenin complex as a therapeutic target for anti-invasion strategies.
- To understand the mechanisms regulating the E-cadherin/catenin complex's function in cancer invasion.
Main Methods:
- Review of molecular mechanisms regulating E-cadherin/catenin complex stability and function.
- Analysis of genetic and posttranslational modifications affecting E-cadherin/catenin complex activity.
- Investigation of extracellular and intracellular interactions involving the E-cadherin/catenin complex.
Main Results:
- E-cadherin/catenin complex downregulation can be irreversible (gene mutations) or reversible (beta-catenin phosphorylation).
- Tyrosine phosphorylation of beta-catenin and transmembrane receptor signaling impact complex function.
- Extracellular homophilic E-cadherin interaction via the HAV sequence is crucial for cell adhesion.
- Insulin-like growth factor-I and tamoxifen have demonstrated potential to upregulate the complex and inhibit invasion in vitro.
Conclusions:
- The E-cadherin/catenin complex is a viable and attractive target for developing novel anti-invasion therapies.
- Targeting the reversible regulatory mechanisms of the E-cadherin/catenin complex holds therapeutic potential.
- Further research into modulating this complex could lead to effective anti-invasive cancer treatments.
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