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Articular cartilage cells immortalized by a temperature sensitive mutant of SV40 large T antigen survive and form cartilage tissue in articular cartilage environment

Articular cartilage cells immortalized by a temperature sensitive mutant of SV40 large T antigen survive and form cartilage tissue in articular cartilage environment

Journal of Cellular Biochemistry 75(2): 338-345

A chondrogenic cell line, TC6, was established by using cells derived from articular cartilage of transgenic mice harboring a temperature-sensitive mutant simian virus (SV) 40 large T-antigen gene. TC6 cells express genes encoding proteins related to cartilage phenotypes such as type II collagen. To examine the in vivo behavior of the TC6 cells, these cells were implanted into cavity-shaped full-thickness defects made in the articular cartilage of the central part of the patellar grooves of mouse femora. One week after implantation, the morphology of the cells was still fibroblastic but these cells were just about to start to form a cartilage-like matrix. By 6 weeks after implantation, the cells had produced abundant cartilaginous matrix and their morphology became closer to that of authentic chondrocytes. This was in sharp contrast to the fibroblastic morphology of these cells in an in vitro environment even after long-term culture. These observations indicate that a cartilage-matrix environment provides a scaffold for the TC6 cells to form cartilage tissues. Our data show that the genetically engineered chondrocytic cell line, TC6, can form a cartilage-like matrix in vivo.

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Accession: 010203217

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PMID: 10502305

DOI: 10.1002/(sici)1097-4644(19991101)75:2<338::aid-jcb15>3.0.co;2-9

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