Figure 3. The TRB3 expression in TNF-α-triggered chondrocytes. Chondrocytes were treated with 0, 1, 5, 10 ng/ml TNF-α for 4 days. (A, B) The TRB3 expression was assessed via blots, and normalization to the levels of β-actin. The results are described as the mean ± SD. *P < 0.05, **P < 0.01 vs. normal group.