Fig. 2From: Overexpression of aquaporin 4 in articular chondrocytes exacerbates the severity of adjuvant-induced arthritis in rats: an in vivo and in vitro studyImmunohistochemistry for AQP4 in articular cartilage of knee joints. a Normal rat (×200). b AIA rat (×200). c The negative control was enclosed to show the antibody specificity. d AQP4 positive expression rate in articular cartilage of knee joints. The rate is defined as (number of positive cells/total cells) × 100%. Data are mean ± SEM (n = 15). ** p < 0.01 compared with the normal groupBack to article page