- Anti-tumour effects of nobiletin, a citrus flavonoid, on gastric cancer include: antiproliferative effects, induction of apoptosis and cell cycle deregulation. Yoshimizu, N., Otani, Y., Saikawa, Y., Kubota, T., Yoshida, M., Furukawa, T., Kumai, K., Kameyama, K., Fujii, M., Yano, M., Sato, T., Ito, A., Kitajima, M. Aliment. Pharmacol. Ther. (2004)