Traction forces exerted through N-cadherin contacts.

Area of Science:

• Cell biology
• Biophysics
• Mechanobiology

Background:

• Mechanical forces are crucial for tissue development and function.
• Cellular mechanical signaling relies on focal adhesions and adherens junctions.
• The role of adherens junctions in force regulation is understudied.

Purpose of the Study:

• To determine force transduction through cadherins at a single cell level.
• To characterize the distribution and magnitude of forces generated by cadherin-mediated cell-cell adhesion.

Main Methods:

• Utilized a micro-force sensor array (μFSA) with elastomer pillars.
• Immobilized N-cadherin-Fc chimeras on pillars for cell culture and force detection.
• Measured individual pillar bending to map forces exerted by N-cadherin-expressing C2 myogenic cells.

Main Results:

• Characterized force distribution through cadherin contacts for the first time.
• Observed forces primarily at the cell edge, directed towards the cell center.
• Found comparable force distribution and amplitude between cadherin and fibronectin adhesions.

Conclusions:

• Presented a versatile method for measuring forces from cell-cell adhesion complexes.
• Demonstrated that cadherin contacts transduce mechanical stress comparable to focal adhesions.
• Emphasized the mechanotransduction role of cadherins in tissue cohesion and reshaping.