Federation of European Biochemical Societies Letters, 12(2-3):173-176, 1999
Stimulation of Ultraviolet-induced Apoptosis of Human Fibroblast UVr-1 Cells by Tyrosine Kinase Inhibitors.
Hiwasa, T., Arase, Y., Chen, Z., Kita, K., Umeza, Zawa, K., Ito, H., Suzuki, N.

Damnacanthal, from Morinda citrifolia exhibited apoptosis (cell death) in cancer cells. Damnacanthal treated cancer cells showed more DNA fragmentation from ultraviolet irradiation, than cancer cells treated with ultraviolet radiation alone.