Abstract:
:A differentiation method of human bone marrow mesenchymal stem cells (MSCs) to chondrocytes was developed for the construction of a three-dimensional (3D) cartilage tissue. The adhesive cells, which were isolated from a human bone marrow aspirate were embedded in type I collagen in a poly-L: -lactate-glycolic acid copolymer (PLGA) mesh and cultivated for 4 week together with growth factors. The degree of cellular differentiation was estimated by quantitative RT-PCR of aggrecan and type II collagen mRNAs and by staining with Safranin O. The 3D culture showed a higher degree of differentiation even without growth factors than the conventional pellet culture with growth factors, namely, dexamethasone and transforming growth factor (TGF)-beta 3. The 3D culture for 2 week with the combined addition of dexamethasone, TGF-beta 3, and insulin-like growth factor (IGF)-I reached a 30% expression of aggrecan mRNA compared with that in primary human chondrocytes, while the aggrecan mRNA expression in the conventional pellet culture was less than 2%. The sequential two-step differentiation cultivation, during which the cells were cultivated in 3D for 1 week after the conventional two-dimensional (2D) culture for 1 week, could markedly accelerate the expression of aggrecan mRNA compared with the 3D cultivation for 2 week.
journal_name
Cytotechnologyjournal_title
Cytotechnologyauthors
Matsuda C,Takagi M,Hattori T,Wakitani S,Yoshida Tdoi
10.1007/s10616-005-3751-xsubject
Has Abstractpub_date
2005-01-01 00:00:00pages
11-7issue
1-3eissn
0920-9069issn
1573-0778journal_volume
47pub_type
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