[Preparation of human meniscus acellular matrix]

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Orthopedic Surgery

Background:

• The human meniscus plays a crucial role in knee joint function.
• Damage to the meniscus often requires tissue engineering solutions.
• Developing a suitable scaffold is essential for successful meniscus regeneration.

Purpose of the Study:

• To develop a cell extraction process for human meniscus acellular matrix.
• To characterize the morphology of the prepared matrix.
• To evaluate the biomechanical properties of the resulting scaffold.

Main Methods:

• Human menisci were processed using a modified eight-step detergent method.
• Staining (hematoxylin-eosin, toluidine blue, Sirius red, etc.) and scanning electron microscopy were used for morphological assessment.
• Mechanical testing evaluated transient and maximal recovery rates of deformation and compressive strength.

Main Results:

• The detergent process successfully removed cellular components, confirmed by various stains.
• Scanning electron microscopy revealed an irregular lacunar structure and large pores (80-760 µm) with >67% porosity.
• The scaffold demonstrated favorable biomechanical properties: 89.62% transient recovery, 100% maximal recovery, and 3.04 N maximal compressive strength.

Conclusions:

• The modified eight-step detergent method effectively decellularizes human meniscus while preserving the 3D extracellular matrix.
• The resulting scaffold possesses suitable biomechanical characteristics for potential use.
• This acellular meniscus matrix shows promise as an implant for future human meniscus tissue engineering applications.