Figure 3.

Changes in levels of cleaved caspase 3 in the chondrocytes in the four groups. The chondrocytes were treated with monosodium iodoacetate for 20 min with or without adding human umbilical cord mesenchymal stem cell-conditioned medium for 24 h. After 24 h, the levels of cleaved caspase 3 proteins were examined using Western blotting. (a) Representative Western blots for the expression of caspase 3 proteins in chondrocytes. The expression was increased in the monosodium iodoacetate-treated (b) but effectively decreased in the human umbilical cord mesenchymal stem cell-conditioned medium-treated chondrocytes (P < 0.05). The experiments were repeated in triplicate