Fig. 5From: The preconditioning of lithium promotes mesenchymal stem cell-based therapy for the degenerated intervertebral disc via upregulating cellular ROSThe preconditioning using LiCl did not elevate the expression of GSK-3b and suppressed catabolism activity. a, b The expression of GSK-3b after preconditioning and c, d after NP differentiation. e, f The protein content of MMP13 and ADAMTS5 after differentiation. Error bars depict Mean ± SD. (*P < 0.05)Back to article page