Figure 5From: Partial protection against collagen antibody-induced arthritis in PARP-1 deficient miceRepresentative sections stained with Safranin O in mice with collagen antibody-induced arthritis (CAIA). More severe loss of proteoglycans, indicated by destained cartilage layers, were observed in sections from parp-1+ mice at (a) day 5 and (b) day 12 after CAIA induction compared with knockout mice at (c) day 5 and (d) day 12.Back to article page