Figure 4. Chondrocyte autophagy is dependent on TRB3. (A, B) Protein expression of TRB3, P62, Beclin 1 and LC3 in isolated chondrocytes from young healthy treated with TNF-α, TRB3 siRNA or control siRNA. (C) Chondrocyte autophagic activity was detected by Immunofluorescence of P62 and MDC staining. The results are described as the mean ± SD. *P < 0.05, **P < 0.01 vs. normal group.