- Curcumin (diferuloylmethane) inhibits constitutive active NF-kappaB, leading to suppression of cell growth of human T-cell leukemia virus type I-infected T-cell lines and primary adult T-cell leukemia cells. Tomita, M., Kawakami, H., Uchihara, J.N., Okudaira, T., Masuda, M., Takasu, N., Matsuda, T., Ohta, T., Tanaka, Y., Ohshiro, K., Mori, N. Int. J. Cancer (2006)