Figure 3.

Stem cell markers in human osteoarthritis (OA) articular cartilage. (a) Safranin O and Notch-1 staining in clusters (10× and 40×). (b) Safranin O and Stro-1 staining of OA cartilage sections (10× and 40×). (c) OA cartilage sections immunostained for VCAM-1 (10× and 40×). Positive staining indicated by black arrows and negative with white arrows.

Grogan et al. Arthritis Research & Therapy 2009 11:R85   doi:10.1186/ar2719
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