Figure 1.

A, The list that was itemized the detailed conditions of patients who underwent surgery. B, Immunohistochemical staining of IL‐17A in nucleus pulposus (NP) cells of a non‐degenerated human intervertebral disc and a degenerative intervertebral disc. IL‐17A expression was prominent in the NP cells of herniated discs. Scale bars: 10 μm. C, The percentage of IL‐17A‐positive NP cells in human intervertebral discs. There was a significant increase in IL‐17A‐positive cells in the degenerative discs. Results shown as mean ± SD; n = 5‐6, *P < 0.05