Purified viable fat suspended in matrigel improves volume longevity

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Plastic Surgery

Background:

• Autologous fat is a widely used soft tissue filler for cosmetic and reconstructive purposes.
• Current limitations include unpredictable graft longevity and fat graft survival rates.

Purpose of the Study:

• To evaluate novel adipocyte tissue engineering techniques for improving in vivo fat graft performance.
• To assess the impact of purification and GFR-Matrigel suspension on mature fat cell viability and graft longevity.

Main Methods:

• Optimized adipocyte purification and viability using a novel protocol.
• Suspended purified fat cells in GFR-Matrigel, a basement membrane protein matrix, to support angiogenesis.
• Tested in vivo longevity in a murine model comparing purified/GFR-Matrigel grafts, unpurified grafts, and GFR-Matrigel alone.

Main Results:

• Purified fat/GFR-Matrigel grafts demonstrated superior fat volume maintenance (80.2% vs. 29.7%) at 3 months.
• Significantly higher adipocyte cellular longevity was observed in purified grafts (70.1% vs. 45.6%).
• Unpurified grafts showed extensive fibrosis (96.5%) and inflammation, unlike purified grafts.

Conclusions:

• A preparatory regimen of fat cell purification and suspension in a resorbable matrix enhances fat graft performance.
• This tissue engineering approach may improve the predictability and longevity of autologous fat grafts.
• Future applications in cosmetic and reconstructive surgery can benefit from these advancements.