Patterning bacterial nanocellulose at cell-size scale using UV laser technology to create immunomodulatory interfaces

Area of Science:

• Biomaterials Science
• Immunology
• Regenerative Medicine

Background:

• Developing immune-instructive biomaterials is crucial for next-generation biomedical implants and regenerative medicine.
• Bacterial nanocellulose (BNC) offers a promising biocompatible scaffold, but its surface properties need optimization for controlled host response.

Purpose of the Study:

• To investigate the use of UV laser patterning to create cell-size topographies on BNC surfaces.
• To evaluate how these engineered BNC topographies modulate immune cell behavior and host response in vitro and in vivo.

Main Methods:

• UV laser patterning was used to create distinct anisotropic and isotropic topographies on BNC surfaces.
• THP1 cell behavior (morphology, orientation, activity, polarization) was assessed on patterned BNC.
• In vivo subcutaneous implantation in mice evaluated the anti-fibrotic potential and immune response to patterned BNC coatings.

Main Results:

• UV laser patterning reliably generated precise BNC surface topographies.
• Engineered BNC surfaces modulated THP1 cell behavior, with anisotropic patterns inducing M2-like polarization and reduced inflammation.
• In vivo studies showed BNC coatings, particularly anisotropic ones, significantly reduced fibrosis and inflammation, promoting tissue remodeling.

Conclusions:

• UV laser patterning is an effective method for engineering immunomodulatory BNC interfaces.
• Tailored BNC surface topography can guide immune responses towards healing and reduce adverse foreign body reactions.
• This approach holds significant potential for advancing biomedical implants and regenerative medicine applications.