Bar graphs illustrating histological score and total NP GAGs between groups. (A) The histological score of the discs in the bleomycin group was significantly higher than the control groups (#
P < 0.01). (B) The total GAG of NP in the bleomycin group decreased significantly compared with the control group (#
P < 0.01). GAGs: Glycosaminoglycans; NP: nucleus pulposus.