

Author: Neuzil J. Weber T. Terman A. Weber C. Brunk U.T.
Publisher: Maney Publishing
ISSN: 1743-2928
Source: Redox Report, Vol.6, Iss.3, 2001-06, pp. : 143-151
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Abstract
Recent evidence suggests that vitamin E and its analogues, which have been used for many years as antioxidants, may not only protect cells from free radical damage but also induce apoptotic cell death in various cell types. While -tocopherol (-TOH) is mainly known as an anti-apoptotic agent, its redox-silent analogues either have no influence on cell survival (-tocopheryl acetate, -TOA), or induce apoptosis (-tocopheryl succinate, -TOS). Although precise mechanisms of apoptosis induction by -TOS remain to be elucidated, there is evidence that this process involves both the antiproliferative and membrane destabilising activities of the agent. -TOS has been shown to induce apoptosis in malignant cell lines but not, in general, in normal cells, and to inhibit tumorigenesis
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