Figure 5From: Prostaglandin E2 regulates the expression of connective tissue growth factor (CTGF/CCN2) in human osteoarthritic chondrocytes via the EP4 receptorSecreted levels of CTGF from chondrocytes. The results of ELISA assays using culture supernatants from OA chondrocytes (n = 5) are summarized. All of the assays were performed in duplicate.Back to article page