A novel mechanism of natural vitamin E tocotrienol activity: involvement of ERbeta signal transduction.
A novel mechanism of natural vitamin E tocotrienol activity: involvement of ERbeta signal transduction.
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天然维生素 E 生育三烯酚活性的新机制:ERbeta 信号转导的参与。
DOI:
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
F. Virgili
中科院分区:
文献类型:
--
作者:
Raffaella Comitato;K. Nesaretnam;G. Leoni;R. Ambra;R. Canali;A. Bolli;M. Marino;F. Virgili
Vitamin E is a generic term used to indicate all tocopherol (TOC) and tocotrienol (TT) derivates. In the last few years, several papers have shown that a TT-rich fraction (TTRF) extracted from palm oil inhibits proliferation and induces apoptosis in a large number of cancer cells. However, the molecular mechanism(s) involved in TT action is still unclear. In the present study, we proposed for the first time a novel mechanism for TT activity that involves estrogen receptor (ER) signaling. In silico simulations and in vitro binding analyses indicated a high affinity of TTs for ERbeta but not for ERalpha. In addition, in ERbeta-containing MDA-MB-231 breast cancer cells, we demonstrated that TTs increase the ERbeta translocation into the nucleus, which in turn activates estrogen-responsive genes (MIC-1, EGR-1 and cathepsin D), as demonstrated by cell preincubation with the ER inhibitor ICI-182,780. Finally, we observed that TT treatment is associated with alteration of cell morphology, DNA fragmentation, and caspase-3 activation. Altogether, these experiments elucidated the molecular mechanism underling gamma- and delta-TT effects.
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影响因子:
3.6
作者:
Malayer,JR;Cheng,J;Woods,VM
通讯作者:
Woods,VM
DOI:
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发表时间:
2004
期刊:
Critical reviews in oncology/hematology
影响因子:
--
作者:
S. Pearce;V. Jordan
通讯作者:
S. Pearce;V. Jordan
影响因子:
3.8
作者:
Liu, Zhiwei;Yu, Xinyuan;Shaikh, Zahir A.
通讯作者:
Shaikh, Zahir A.
影响因子:
6.1
作者:
Sen, CK;Khanna, S;Roy, S
通讯作者:
Roy, S
影响因子:
4.2
作者:
He, L;Mo, HB;Elson, CE
通讯作者:
Elson, CE