- Ubiquitin-proteasome inhibitor enhances tumour necrosis factor-alpha-induced apoptosis in rat gastric epithelial cells. Naito, Y., Handa, O., Takagi, T., Ishikawa, T., Imamoto, E., Nakagawa, S., Yamaguchi, T., Yoshida, N., Matsui, H., Yoshikawa, T. Aliment. Pharmacol. Ther. (2002)