De novo adipose formation in a vascularized engineered construct

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Adipose Tissue Biology

Background:

• Fat tissue engineering faces challenges in maintaining viability and function in vivo.
• Existing methods struggle with the unique metabolic and structural needs of adipose tissue.
• Developing robust engineered adipose tissue is crucial for reconstructive applications.

Purpose of the Study:

• To create and evaluate a vascularized, three-dimensional engineered adipose tissue construct.
• To assess the long-term persistence and stability of the engineered fat tissue in a preclinical model.
• To explore the potential of incorporating a vascular supply for enhanced construct survival and transferability.

Main Methods:

• Utilized a fibrovascular scaffold with Matrigel and basic fibroblast growth factor to induce liponeogenesis.
• Integrated a pedicled blood supply (superficial inferior epigastric vessels) within a silicone housing.
• Assessed adipose tissue and vascular ingrowth histologically over a 16-week period at 4-week intervals in a rat model.

Main Results:

• Demonstrated successful creation of shaped adipose tissue constructs.
• Confirmed the persistence of engineered adipose tissue over the 16-week study duration.
• Observed histological evidence of vascular and adipose tissue ingrowth within the construct.

Conclusions:

• Incorporating a vascular supply enhances the durability of experimentally induced fat constructs.
• This approach shows promise for the microsurgical transfer of engineered adipose tissue.
• Further research may lead to improved fat grafting and reconstructive techniques.