Fig. 2

Immunohistochemistry of HIF-1α and the NICD in nucleus pulposus cells obtained from patients with different MCs and the control group. Scale bar: 20 μm. Values are presented as the mean ± S.E.M. *p < 0.05, **p < 0.01. NICD, Notch1 intracellular domain; MCs, Modic changes