A Preclinical Animal Model for the Study of Scaffold-Guided Breast Tissue Engineering

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Surgical Innovation

Background:

• Current breast reconstructive surgery lacks sufficient clinically relevant large animal models for novel tissue engineering concepts.
• Existing large animal studies for breast tissue engineering are limited, with poor characterization.
• A need exists for well-described, reproducible preclinical models to advance scaffold-guided breast tissue engineering (SGBTE).

Purpose of the Study:

• To describe and validate an original preclinical large animal model for scaffold-guided breast tissue engineering (SGBTE).
• To assess the feasibility of using this model to investigate various soft tissue regeneration strategies.
• To provide a foundation for translating SGBTE concepts into clinical practice for breast reconstruction.

Main Methods:

• Developed a porcine model for long-term (12 months) scaffold-guided breast tissue engineering.
• Implanted 60 additively manufactured bioresorbable scaffolds under the panniculus carnosus muscle in 12 pigs.
• Investigated multiple treatment modalities including fat grafting and platelet-rich plasma within scaffolds.

Main Results:

• The porcine model demonstrated no wound complications over the 12-month study period.
• Clinically relevant volumes of soft tissue were successfully regenerated, validating the model's efficacy.
• The model allowed for flexible comparison of different regenerative treatments within a single study.

Conclusions:

• The described porcine model is a robust and flexible preclinical platform for evaluating scaffold-driven soft tissue regeneration strategies for breast reconstruction.
• This model supports the investigation of diverse treatments, accelerating the development of SGBTE.
• The validated long-term model provides a crucial step towards the clinical translation of advanced breast reconstruction techniques.