Figure 1.

Immunohistochemistry of human neutrophil peptides 1-3 (HNP1-3) and human β-defensin 2 (HBD 2) in the synovial lining and sublining area of an RA patient (similar in OA patients). Antibodies to HNP1-3 stained positive in the lining and adjacent sublining area, whereas HBD-2 was found only in deep sublining zones. Magnification 400×.

Riepl et al. Arthritis Research & Therapy 2010 12:R110   doi:10.1186/ar3044
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