Multifunctional Recombinant Human Collagen-Based Janus Membrane to Tailor Cell Microenvironment for Guided Bone...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Commercially available collagen membranes for guided bone regeneration (GBR) have limitations including poor structural design, mechanical weakness, bacterial invasion, and low bioactivity.
• These limitations hinder effective bone defect repair and regeneration.

Purpose of the Study:

• To develop a Janus membrane, TA@hCJM, with distinct porous and dense layers for improved GBR.
• To evaluate the osteogenic, barrier, antioxidant, and antibacterial properties of TA@hCJM for hard tissue regeneration.

Main Methods:

• Fabrication of a Janus membrane (TA@hCJM) using recombinant human type I collagen (rhCol I), PLGA, PCL, and tannic acid (TA).
• The membrane features a porous, hydrophilic layer for cell interaction and a dense, hydrophobic layer for barrier function.
• In vivo studies were conducted to assess the efficacy of TA@hCJM in repairing bone defects.

Main Results:

• The porous layer of TA@hCJM promoted cell adhesion, proliferation, and osteogenic differentiation via the TGF-β/BMP-Smad pathway.
• The dense layer effectively prevented fibroblast infiltration, maintaining a stable regeneration environment.
• TA@hCJM demonstrated enhanced osteogenesis, recruited stem cells, and provided antioxidant and antibacterial effects.
• In vivo results showed complete bone defect repair with new bone tissue formation when using TA@hCJM.

Conclusions:

• TA@hCJM is a promising biomaterial for hard tissue regeneration, offering improved GBR outcomes.
• The Janus membrane design provides a versatile platform for developing advanced collagen-based biomaterials for regenerative applications.