Cell patterning with mucin biopolymers.

Area of Science:

• Biomaterials Science
• Cell Biology
• Surface Chemistry

Background:

• Precise spatial control of cell adhesion is crucial for cell biology and tissue engineering.
• Current methods for creating cell-repellent surfaces often involve complex chemistry.

Purpose of the Study:

• To investigate mucins as a simpler alternative for creating cell-repellent surfaces.
• To explore the potential of mucin coatings for controlling cell adhesion and supporting tissue engineering applications.

Main Methods:

• Mucins were adsorbed onto hydrophobic substrates to form coatings.
• Microfluidic devices were used to pattern mucin coatings with micrometer precision.
• Cell adhesion assays were performed using mammalian epithelial cells, fibroblasts, and myoblasts.
• The role of mucin-associated glycans was assessed by their removal.
• Cell-repulsion was evaluated on both hydrophobic and hydrophilic surfaces, including modified glass.

Main Results:

• Mucins spontaneously formed cell-repellent coatings on hydrophobic surfaces, preventing adhesion of various mammalian cell types.
• Mucin coatings exhibited stability, supporting myoblast differentiation for seven days.
• The cell-repellent effect was found to be dependent on mucin-associated glycans.
• A critical surface density of mucins was required for cell-repulsion, efficiently achieved on hydrophobic surfaces but not hydrophilic glass.
• Coating glass with hydrophobic fluorosilane enabled cell-repulsion, overcoming the limitation of hydrophilic surfaces.

Conclusions:

• Mucin biopolymers offer a promising and simplified approach to controlling cell adhesion on surfaces.
• Mucin coatings can be precisely patterned and are stable enough for tissue engineering applications.
• The glycan component of mucins is essential for their cell-repellent properties.