Fig. 2
From: Peptidoglycan in osteoarthritis synovial tissue is associated with joint inflammation
Association between peptidoglycan, synovial inflammation, and fibrosis. Shown are representative sections of synovial tissue stained for PG by immunohistochemistry (see methods for details). Inflammation and fibrosis were determined by H&E staining and Masson’s trichrome staining, respectively. Each column shows a representative sample that received a PG score 0–4 according to the quantity of PG staining foci per 10 mm2 (0 = none, 1 = 1–9, 2 = 10–19, 3 = 20–29, 4 = 30+). Inflammatory infiltrate and localized areas of fibrosis frequently colocalized with the regions of high PG staining intensity