Original Article | Open Access
Masaki Kawamura, Hirotake Kasai, "Delayed Cell Cycle Progression and Apoptosis Induced by Hemicellulase-Treated Agaricus blazei", Evidence-Based Complementary and Alternative Medicine, vol. 4, Article ID 657219, 12 pages, 2007. https://doi.org/10.1093/ecam/nel059
Delayed Cell Cycle Progression and Apoptosis Induced by Hemicellulase-Treated Agaricus blazei
We examined the effects of hemicellulase-treated Agaricus blazei (AB fraction H, ABH) on growth of several tumor cell lines. ABH inhibited the proliferation of some cell lines without cytotoxic effects. It markedly prolonged the S phase of the cell cycle. ABH also induced mitochondria-mediated apoptosis in different cell lines. However, it had no impact on the growth of other cell lines. ABH induced strong activation of p38 mitogen-activated protein kinase (MAPK) in the cells in which it evoked apoptosis. On the other hand, ABH showed only a weak p38 activation effect in those cell lines in which it delayed cell cycle progression with little induction of apoptosis. However, p38 MAPK-specific inhibitor inhibited both ABH-induced effects, and ABH also caused apoptosis in the latter cells under conditions of high p38 MAPK activity induced by combined treatment with TNF-α. These results indicate that the responsiveness of p38 MAPK to ABH, which differs between cell lines, determines subsequent cellular responses on cell growth.
Copyright © 2007 Masaki Kawamura and Hirotake Kasai. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.