Tissue engineering with meniscus cells derived from surgical debris.

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Orthopedic Surgery

Background:

• Meniscus injuries often require tissue resection, leading to impaired knee function.
• Current treatments fail to restore normal load transmission.
• Tissue engineering offers a potential solution for meniscus repair and regeneration.

Purpose of the Study:

• To investigate the potential of meniscus-derived cells (MDCs) from surgical debris as a cell source for engineered meniscus constructs.
• To assess the influence of donor age and disease status on MDC-derived tissue formation.
• To evaluate the characteristics of engineered meniscus constructs using MDCs.

Main Methods:

• MDCs were isolated from waste meniscus tissue of 10 human donors (ages 18-84).
• Cells were expanded and seeded onto nanofibrous scaffolds in defined media.
• Engineered constructs were cultured for 10 weeks and evaluated for mechanical, biochemical, and histological properties.

Main Results:

• Cells from all donors contributed to construct development, increasing biochemical content and mechanical properties.
• Significant donor-to-donor variability was observed, but not correlated with age or disease.
• High collagen deposition correlated with enhanced tensile properties, reaching up to 40 MPa.

Conclusions:

• Meniscus-derived cells from surgical debris represent a viable cell source for tissue engineering functional meniscus constructs.
• Robust tissue formation is achievable with MDCs from middle-aged and elderly donors.
• This highlights the potential of autologous cell-based therapies for meniscus repair.