- JTE-522, a cyclooxygenase-2 inhibitor, is an effective chemopreventive agent against rat experimental liver fibrosis1. Yamamoto, H., Kondo, M., Nakamori, S., Nagano, H., Wakasa, K., Sugita, Y., Chang-De, J., Kobayashi, S., Damdinsuren, B., Dono, K., Umeshita, K., Sekimoto, M., Sakon, M., Matsuura, N., Monden, M. Gastroenterology (2003)