Figure 4From: Partial protection against collagen antibody-induced arthritis in PARP-1 deficient miceRepresentative hematoxylin-eosin stained sections of knee joints in mice with collagen antibody-induced arthritis (CAIA). Severe inflammation, pannus formation and associated cartilage destruction were observed in sections stained with hematoxylin-eosin from parp-1+ mice at (a) day 5 and (b) day 12 after CAIA induction compared to parp-1o/o mice at (c) day 5 and (d) day 12.Back to article page