Fig. 7

Immunofluorescence images of IL-1β and TNF-α of intervertebral disc tissues with different types of herniation. Green fluorescence represents IL-1β staining, while red fluorescence represents TNF-α staining. High expression of both IL-1β and TNF-α was detected in the central nucleus pulposus of degenerated intervertebral discs and in the central and paramedian herniation disc herniated site