- Osteogenic protein-1 (osteogenic protein-1/bone morphogenetic protein-7) inhibits degeneration and pain-related behavior induced by chronically compressed nucleus pulposus in the rat. Kawakami, M., Matsumoto, T., Hashizume, H., Kuribayashi, K., Chubinskaya, S., Yoshida, M. Spine. (2005)