Figure 5From: Quantitative T2 mapping to characterize the process of intervertebral disc degeneration in a rabbit model Relative gene expressions of aggrecan and type II collagen in L4/5 NP at different time points. Aggrecan and type II collagen mRNA decreased markedly from pre-op to 3Â weeks postoperatively, and then declined gradually with time. * P<0.05, # P<0.05.Back to article page