Comparison of in vivo adipogenic capabilities of two different extracellular matrix microparticle scaffolds.
BACKGROUND
The extracellular matrix is an essential microenvironment for cell survival activity. The adipose tissue extract microparticle scaffolds from human adipose tissue and small intestine submucosa microparticle scaffolds from porcine jejunum were prepared. Their effects on the adipogenic capabilities of human adipose-derived stem cells were compared in vivo.


METHODS
A combination of physical and chemical methods was used to decellularize human fat and porcine jejunum. Expression of CD molecules on the adipose-derived stem cell surface was determined by flow cytometry. The stem cells were then cultured with the scaffold materials in vitro. The cell-scaffold complexes were implanted subcutaneously into nude mice, and samples were collected 4 and 8 weeks later. The adipogenic differentiation capabilities of adipose-derived stem cells were studied by histologic methods and real-time polymerase chain reaction.


RESULTS
The authors observed high expression of CD90 and CD44; no expression of CD34, CD45, CD31, or CD106; and weak positive expression of CD49d on the extracted cells, which indicates that the cells were adipose-derived stem cells. The main constituent of the decellularized adipose tissue extract and small intestine submucosa microparticles was collagenous fiber, and the cells proliferated faster on the adipose tissue extract than on small intestine submucosa. Formation of adipocytes in the adipose tissue extract group was closer to that of normal human fat tissue compared with that of the small intestine submucosa group.


CONCLUSIONS
Extracellular matrix microparticle scaffolds could promote proliferation, adhesion, and adipogenic differentiation of adipose-derived stem cells. The role of the adipose tissue extract microparticle scaffold in promoting adipogenesis was stronger and more suitable as a vector in fatty tissue engineering.
Shenyang and Dalian, People's Republic of China From the Department of Tissue Engineering, College of Basic Medicine, China Medical University; The People's Hospital of Liaoning; and the Department of Plastic Surgery, Xinhua Hospital, Dalian University.
Jie-Qing
JQ
Wang
Jun
J
Fan
Jing-Heng
JH
Gao
Chen
C
Zhang
Shu-Ling
SL
Bai
D000273:Adipose Tissue / Q000166:cytology*; D000328:Adult; D000818:Animals; D055252:Cell-Derived Microparticles / Q000502:physiology*; D005109:Extracellular Matrix / Q000502:physiology*; D005260:Female; D006801:Humans; D007413:Intestinal Mucosa / Q000166:cytology*; D007583:Jejunum / Q000166:cytology*; D008875:Middle Aged; D013552:Swine; D054457:Tissue Scaffolds; D055815:Young Adult