Cells cultured on microgrooves with or without surface coating: correlation between cell alignment, spreading and...

Area of Science:

• Biomaterials Science
• Cell Biology
• Surface Science

Background:

• Cell behavior on patterned substrates is influenced by material properties like stiffness, geometry, and surface chemistry.
• Understanding cell-pattern interactions is crucial for designing biomaterials that guide cellular responses.

Purpose of the Study:

• To investigate the relationship between microgroove geometry, surface coating, and cellular morphology.
• To explore the correlation between cell membrane penetration into microgrooves and cellular alignment.
• To determine if this correlation is dependent on cell type.

Main Methods:

• Utilized reversed cell imprinting (RCI) technique for creating patterned substrates.
• Employed phase contrast microscopy, scanning electron microscopy (SEM), and atomic force microscopy (AFM) for analysis.
• Cultured HeLa and NIH 3T3 cells on microgrooves with and without fibronectin coating.

Main Results:

• Without fibronectin coating, approximately 80% of HeLa cells aligned with groove direction.
• Fibronectin coating increased cell spreading area but decreased cellular alignment.
• Measured cell membrane deformation at interfaces and found correlation between membrane penetration and cellular alignment.
• Observed that the cell-membrane penetration-alignment correlation is cell-type dependent.

Conclusions:

• Cellular alignment on microgrooved substrates is influenced by surface chemistry and groove geometry.
• Local penetration of the cell membrane into microgrooves is a key factor in contact guidance.
• The extent of membrane penetration and its correlation with alignment differs between cell types (HeLa and NIH 3T3).