Cell guidance by micropatterned adhesiveness in vitro

Area of Science:

• Cell Biology
• Biophysics
• Materials Science

Background:

• Morphogenetic cell migrations are crucial for development and are thought to be guided by adhesive cues.
• Understanding how cells respond to patterned environments is key to controlling cell behavior.
• Previous studies suggest differential adhesion plays a role in guiding cell movement.

Purpose of the Study:

• To investigate how patterned surfaces with alternating adhesive and non-adhesive tracks influence cell orientation and elongation.
• To model in vitro how differentially adhesive guidance cues affect cell migration.
• To determine the impact of pattern geometry, cell type, and cell-cell interactions on cellular response.

Main Methods:

• Utilized electronics microfabrication to create substrata with patterned tracks of varying periods (4-50 microns).
• Employed fibroblastic BHK cells and epithelial MDCK cells to assess responses on these patterned surfaces.
• Analyzed cell orientation, elongation, and responsiveness based on pattern geometry and cell type.

Main Results:

• Both BHK and MDCK cells showed orientation and elongation in response to the patterned surfaces.
• Cellular responsiveness varied with cell type, cell-cell interactions, and pattern geometry.
• BHK cell alignment increased with larger pattern periods, while single MDCK cells aligned to all periods, with elongation dependent on period.

Conclusions:

• The geometry of differential adhesion patterns is a critical factor in controlling local cell guidance.
• Cellular bridging over non-adhesive regions influences the effectiveness of linear guidance cues.
• These findings have significant implications for understanding in vivo cell guidance mechanisms and guideposting.