Cadherin-mediated cell-cell adhesion and tissue segregation in relation to malignancy

Area of Science:

• Developmental Biology
• Cell Biology
• Cancer Biology

Background:

• Tissue segregation during embryonic development is crucial for forming distinct cellular compartments.
• This process is driven by changes in cell adhesion strengths and resulting interfacial tensions.
• Cadherins and integrin-fibronectin systems mediate these critical cell-cell and cell-matrix adhesions.

Purpose of the Study:

• To review the biophysical basis of tissue segregation driven by cell adhesion dynamics.
• To explore the role of adhesion molecule quantities versus types in tissue separation.
• To investigate the potential role of reversed adhesion dynamics in malignant invasion.

Main Methods:

• Review of existing scientific literature on cell adhesion and tissue segregation.
• Analysis of experimental evidence regarding cadherin and integrin functions.
• Examination of cancer cell invasion models and adhesion molecule expression.

Main Results:

• Tissue segregation is an immiscibility phenomenon driven by differential cell adhesion strengths, leading to interfacial tension.
• Segregation occurs when cross-adhesion is weaker than self-adhesion, influenced by adhesion molecule quantities.
• While N-cadherin can enhance invasiveness, increased expression of E-, P-, or N-cadherin can also restrain cancer cell spreading.

Conclusions:

• Cell adhesion strength, modulated by adhesion molecule quantity, is a primary driver of tissue segregation.
• Malignant invasion may involve altered adhesion dynamics, but cadherin expression can paradoxically inhibit cancer cell spread.
• Understanding these adhesion mechanisms is vital for both developmental biology and cancer research.