Fig. 11

Representative histology of nucleus pulposus cells. Histology of cellular changes in the nucleus pulpous (NP) of MIA 1.0 mg-injected discs after 2 (A), 4 (B), 8 (C), and 12 weeks (D) post-injection stained with hematoxylin-eosin are representatively shown. Scale bar: 5 μm (A–D). Safranin-O staining histology of cell clones in the NP of MIA 0.01 mg-injected disc is representatively shown (E). Scale bar: 25 μm (E)