Related Experiment Video
Updated: Apr 15, 2026
Fabrication and Characterization of Layer-By-Layer Janus Base Nano-Matrix to Promote Cartilage Regeneration
Published on: July 6, 2022
Engineering meniscus structure and function via multi-layered mesenchymal stem cell-seeded nanofibrous scaffolds.
Matthew B Fisher1, Elizabeth A Henning2, Nicole Söegaard3
1McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Translational Musculoskeletal Research Center, Philadelphia VA Medical Center, Philadelphia, PA 19104, USA; Department of Biomedical Engineering, University of North Carolina, Chapel Hill, North Carolina 27599, USA and North Carolina State University, Raleigh, North Carolina 27695, USA.
Engineered multi-layer scaffolds mimic knee meniscus structure, showing alignment dictates mechanical properties. Circumferentially aligned constructs demonstrated superior mechanical reinforcement for tissue engineering applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Orthopedic Research
Background:
- Knee meniscus tissue engineering faces challenges replicating native tissue's complex collagenous structure.
- The circumferential and radial collagen alignment is critical for the meniscus's mechanical function.
Purpose of the Study:
- To develop multi-lamellar mesenchymal stem cell (MSC)-seeded nanofibrous constructs mimicking the meniscus's hierarchical structure.
- To investigate how scaffold alignment and layering influence construct mechanical properties and tissue formation.
Main Methods:
- Created multi-layer nanofibrous scaffolds using poly(ε-caprolactone) with varied fiber alignments (0°, 90°, circumferential).
- Seeded scaffolds with bovine MSCs and cultured for 6 weeks to promote fibrocartilaginous tissue formation.
- Evaluated construct stiffness and collagen content using tensile testing and biochemical analysis.
Main Results:
- Single-layer 0° and circumferential constructs exhibited higher stiffness than 90° constructs.
- Multi-layer 0°/0°/0° constructs were the stiffest; 90°/90°/90° were the least stiff.
- Circumferentially aligned constructs (C/C/C) showed positive mechanical reinforcement due to layered construction, mimicking native meniscus properties.
Conclusions:
- Multi-lamellar scaffold architecture dictates biomechanical properties, crucial for functional meniscus substitutes.
- Circumferentially aligned constructs offer promising mechanical reinforcement for knee meniscus tissue engineering.
- These constructs serve as valuable models for studying meniscus mechanics and developing regenerative therapies.
