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Figure 2 | Arthritis Research & Therapy

Figure 2

From: Accelerated cellular senescence in degenerate intervertebral discs: a possible role in the pathogenesis of intervertebral disc degeneration

Figure 2

Senescence biomarker immunohistochemistry. (a) p16INK4a immunopositivity in the nucleus pulposus of human intervertebral discs. (b) Immunoglobulin G controls were negative. (c) Senescence-associated β-galactosidase staining in directly extracted cells from non-degenerate discs. (d) Senescence-associated β-galactosidase staining in directly extracted cells from degenerate discs (positive cells indicated with arrows). Scale bars = 190 μm (a, b) and 370 μm (c, d).

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