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Adipose tissue engineering based on human preadipocytes combined with gelatin microspheres containing basic
Yu Kimura1, Makoto Ozeki, Takashi Inamoto
1Institute for Frontier Medical Sciences, Kyoto University, 53 Kawara-cho Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
Biomaterials
|April 16, 2003
Summary
Controlled release of basic fibroblast growth factor (bFGF) using gelatin microspheres combined with preadipocytes successfully induced adipose tissue formation. This combination is essential for fat tissue engineering.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Adipose tissue engineering is crucial for reconstructive surgery and metabolic disease research.
- Controlled delivery of growth factors is key to directing cell behavior and tissue formation.
- Preadipocytes offer a promising cell source for generating new fat tissue.
Purpose of the Study:
- To develop gelatin microspheres for controlled release of basic fibroblast growth factor (bFGF).
- To investigate the efficacy of co-implanting bFGF-loaded gelatin microspheres with human preadipocytes for adipose tissue formation.
- To optimize preadipocyte number and bFGF dosage for maximal adipose tissue generation.
Main Methods:
- Gelatin microspheres loaded with bFGF were prepared.
- Human preadipocytes were combined with bFGF-loaded microspheres and incorporated into a collagen sponge scaffold.
- The composite scaffold was subcutaneously implanted into nude mice.
- Adipose tissue formation was assessed post-implantation, with varying cell numbers and bFGF doses.
Main Results:
- Subcutaneous implantation of the composite scaffold resulted in significant adipose tissue formation within 6 weeks.
- Adipose tissue formation increased with preadipocyte numbers up to 1.0 x 10^5 cells/site.
- Optimal bFGF dose for maximal adipose tissue formation was 1 microg/site; lower or higher doses were less effective.
- Immunohistochemistry confirmed the newly formed adipose tissue comprised mature human adipocytes.
Conclusions:
- The combination of gelatin microspheres containing bFGF, preadipocytes, and a collagen sponge scaffold is essential for effective fat tissue engineering.
- Controlled release of bFGF from gelatin microspheres enhances preadipocyte-induced adipose tissue formation compared to free bFGF.
- This approach holds promise for regenerative medicine applications requiring adipose tissue regeneration.