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Figure 2 | Arthritis Research & Therapy

Figure 2

From: Catabolic cytokine expression in degenerate and herniated human intervertebral discs: IL-1β and TNFα expression profile

Figure 2

Photomicrographs illustrating immunohistochemistry staining for IL-1β, tumour necrosis factor (TNF)α and their receptors in human intervertebral discs. Results for non-degenerate discs (grade 1) are shown in A1 to E1 and result for degenerate discs (grade 12) are shown in A2 to E2: IL-1β (A); IL-1RI (B); TNFα (C); TNF RI (D); IgG controls (E) were all negative. Immunopositivity shows as brown staining. Bars = 570 μm.

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