Silk Fibroin Surface Engineering Using Phase Separation Approaches for Enhanced Cell Adhesion and Proliferation.

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Cell Biology

Background:

• Silk fibroin exhibits excellent mechanical properties and biocompatibility, making it promising for biomedical applications.
• Poor cell adhesion and proliferation on silk fibroin surfaces limit its use.
• Developing methods to improve cell interaction with silk fibroin is crucial.

Purpose of the Study:

• To develop tunable surface texturing methods for silk fibroin.
• To enhance cell adhesion and proliferation on silk fibroin materials.
• To create stable, biocompatible silk fibroin surfaces for biomedical applications.

Main Methods:

• Utilized phase-separation techniques with good and poor solvents to create nano to macro scale surface textures.
• Controlled the transformation of silk fibroin secondary structures (Silk I and Silk II) during surface treatment.
• Prepared planar and 3D printed fibroin surfaces with tunable hierarchical structures.

Main Results:

• Successfully fabricated silk fibroin surfaces with controlled nano, micro, and macro level texturing.
• Achieved long-term stability of textured surfaces in physiological environments.
• Demonstrated significantly enhanced adhesion and proliferation of human keratinocytes and skin fibroblasts.

Conclusions:

• Phase-separation approaches offer a template-free method for creating biocompatible, textured silk fibroin surfaces.
• Tunable surface structures on silk fibroin promote enhanced cell interactions.
• These advancements hold potential for improved tissue engineering and regenerative medicine scaffolds.