Thursday, March 25, 2010

Chondrocyte Extract

Differentiation of bone marrow-derived mesenchymal stem cells into chondrocytes using chondrocyte extract.

"[We] investigate the chondrogenic transdifferentiation potential of swine bone marrow-derived mesenchymal stem cells (BM-MSCs) by culturing with chondrocyte extract, using monolayer and micromass culture. Chondrogenic-specific markers were detected via reverse transcription-polymerase chain reaction (RT-PCR) and immunofluorescence. After 7 days of induction in monolayer culture, BM-MSCs reversibly permeabilized with streptolysin O (SLO), a bacterial exotoxin that is capable of forming large pores in the plasma membrane of mammalian cells, and expressed chondrocyte‑specific genes such as type II collagen (COL II) and aggrecan. A positive protein expression of COL II was also observed. However, BM-MSCs treated without SLO did not express the related genes and proteins. The transition of reprogrammed BM-MSCs was lost 14 days later. By using micromass culture, reprogrammed BM-MSCs were able to maintain the change until the 14th day. In summary, permeabilized BM-MSCs were transiently transdifferentiated into chondrocytes by co-culturing with the chondrocyte extract. Moreover, a high-density culture method was able to increase the time in which the phenotypic change was maintained."

Unfortunately I could not get the full study.

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