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Truncated DCC reduces N-cadherin/catenin expression and calcium-dependent cell adhesion in neuroblastoma cells

M Reyes-Múgica1, J A Meyerhardt, J Rzasa

  • 1Department of Pathology, Yale University School of Medicine and West Haven Veterans Administration Medical Center, New Haven, Connecticut 06520-8023,USA. miguel.reyes@yale.edu

Laboratory Investigation; a Journal of Technical Methods and Pathology
|March 10, 2001
PubMed

Insights

Overexpressing a truncated Deleted in Colorectal Cancer (DCC) protein in neuroblastoma cells reduced their epithelioid shape and cell adhesion. This study links DCC to N-cadherin and catenin-dependent cell adhesion mechanisms.

Area of Science:

  • Cell Biology
  • Neuroscience
  • Cancer Research

Background:

  • The Deleted in Colorectal Cancer (DCC) protein is crucial for neural development and implicated in neuroblastoma cell migration.
  • Understanding DCC protein function is vital for neuroblastoma research.

Purpose of the Study:

  • To investigate the function of DCC protein by overexpressing full-length and truncated DCC constructs in a human neuroblastoma cell line.
  • To define the role of DCC in neuroblastoma cell morphology and adhesion.

Main Methods:

  • Overexpression of full-length and truncated DCC constructs in human neuroblastoma cells.
  • Immunoblot and Northern blot analysis to assess protein and gene expression (N-cadherin, alpha-catenin, beta-catenin, desmoglein).
  • Immunofluorescence for N-cadherin localization and cell aggregation studies for cell adhesion analysis.

Main Results:

  • Overexpression of truncated DCC led to a less epithelioid morphology.
  • Decreased expression of N-cadherin and alpha-/beta-catenin was observed.
  • Diminished calcium-dependent cell aggregation was evident in truncated DCC transfectants.

Conclusions:

  • Truncated DCC protein overexpression in neuroblastoma cells causes loss of epithelioid morphology and reduced cell adhesion.
  • This study establishes a functional link between DCC and N-cadherin/catenin-dependent cell adhesion.
  • Findings provide insights into DCC's role in neuroblastoma cell behavior and potential therapeutic targets.

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