Comparison of four methods for generating decellularized equine synovial extracellular matrix

Area of Science:

• Veterinary Medicine
• Biomaterials Science
• Tissue Engineering

Background:

• The equine synovial extracellular matrix (ECM) is a promising biomaterial for regenerative medicine.
• Developing effective decellularization methods is essential for its use in tissue engineering applications.
• Current methods vary in their ability to remove cellular material while preserving ECM structure.

Purpose of the Study:

• To compare four distinct methods for decellularizing equine synovial ECM.
• To evaluate the efficiency of cell removal and DNA reduction for each method.
• To assess the impact of decellularization on the structural integrity of the synovial villous architecture.

Main Methods:

• Four decellularization protocols were tested on equine synovial samples: 0.1% peracetic acid (PAA) once, 0.1% PAA twice, Triton X-100/DNase, and 2M NaCl/DNase.
• Histologic examination and scanning electron microscopy were used to assess villous integrity and collagen structure.
• DNA content and fragment size were measured to evaluate decellularization efficiency; cell viability was confirmed through culture and staining.

Main Results:

• Single PAA treatment preserved architecture but left high DNA content and large DNA fragments.
• Triton X-100 and 2M NaCl treatments effectively reduced DNA but destroyed the synovial villous architecture.
• Dual PAA treatment achieved low DNA content and short DNA fragments while maintaining synovial villous architecture.

Conclusions:

• Incubation in 0.1% peracetic acid twice is the most effective method for generating decellularized equine synovial ECM.
• This method balances efficient decellularization with the preservation of critical structural components.
• The findings support the use of this optimized protocol for equine synovial ECM-based regenerative therapies.