Automated Assessment of Cell Infiltration and Removal in Decellularized Scaffolds - Experimental Study in Rabbits

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Decellularized tendon scaffolds (DTSs) are promising for rotator cuff repair.
• Objective assessment of decellularization and cell infiltration is critical for scaffold efficacy.

Purpose of the Study:

• To develop and validate a semiquantitative and automated method for measuring nuclear material removal during decellularization.
• To assess cell infiltration into DTSs in an in vivo rotator cuff tear model.

Main Methods:

• Utilized a decellularization protocol on rabbit gastrocnemius tendons.
• Employed semiquantitative and automated analysis to evaluate nuclear material removal.
• Assessed cell infiltration in DTSs implanted in a rabbit rotator cuff tear model at 2 and 8 weeks.

Main Results:

• The decellularization protocol removed 79% of nuclear material and decreased its occupied area by 88%.
• Cell infiltration into DTSs increased by 256% between 2 and 8 weeks post-implantation.
• The automated method demonstrated high statistical significance (p < 0.001) and power (>99%) for both outcomes.

Conclusions:

• The developed semiquantitative and automated method objectively quantifies nuclear material removal in DTSs.
• The method effectively measures cell infiltration into DTSs in a relevant in vivo model.
• This technique provides a reliable tool for quality control in scaffold-based regenerative therapies.