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- W2028690282 abstract "Although autologous chondrocyte implantation has already been in clinical use, chondrocyte dedifferentiation is problematic during proliferation culture. We attempted a three-dimensional (3D) collagen gel culture under chondrocyte proliferation with repeated passaging to prevent the chondrocytes dedifferentiation. Human auricular chondrocytes were cultured in 3D or conventional monolayer conditions, which reached a 1000-fold increase in cell numbers at passages 3 and 4, respectively. During multiplication, the chondrocytes in 3D culture showed greater suppression of collagen type I (COL1) and preservation of collagen type II (COL2) than those in monolayer. Tissue-engineered cartilage made of 3D cells also abundantly accumulated COL2 or proteoglycan and possessed favorable mechanical properties. The advantage of 3D cells may result from the similarity of microenvironments in cell-to-matrix adhesion or cell-to-cell contacts with that of native cartilage. The up-regulation of integrins and down-regulation of cadherins in the 3D cells mimicked the expression pattern of native cartilage, rather than that of monolayer cells. The silencing of integrin β1 and Ob-cadherin expression by small interfering ribonucleic acid in the cultured chondrocytes led to the promotion of dedifferentiation and redifferentiation, respectively, indicating that the 3D collagen gel culture provided sufficient cell preparation and reduced chondrocyte dedifferentiation, which is regarded as a feasible strategy in autologous chondrocyte implantation." @default.
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- W2028690282 date "2007-07-01" @default.
- W2028690282 modified "2023-10-02" @default.
- W2028690282 title "Three-Dimensional Microenvironments Retain Chondrocyte Phenotypes During Proliferation Culture" @default.
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- W2028690282 doi "https://doi.org/10.1089/ten.2006.0322" @default.
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