Sodium selenite increases the activity of the tumor suppressor protein, PTEN, in DU-145 prostate cancer cells.
Sodium selenite increases the activity of the tumor suppressor protein, PTEN, in DU-145 prostate cancer cells.
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亚硒酸钠在DU-145前列腺癌细胞中增加了肿瘤抑制蛋白PTEN的活性。
DOI:
10.1080/01635580802521338
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
Meuillet EJ
中科院分区:
文献类型:
--
作者:
Berggren M;Sittadjody S;Song Z;Samira JL;Burd R;Meuillet EJ
Epidemiological and clinical data suggest that selenium may prevent prostate cancer, however the cellular effects of selenium in malignant prostate cells are not well understood. We previously reported that the activity of the tumor suppressor PTEN is modulated by thioredoxin (Trx) in a RedOx-dependent manner. In this study, we demonstrate that the activity of Trx Reductase is increased by seven-fold in the human prostate cancer cell line, DU-145, after five days of sodium selenite (Se) treatment. The treatment of DU-145 cells with increasing concentrations of Se induced an increase in PTEN lipid phosphatase activity by two-fold, which correlated with a decrease in phospho-Ser473-Akt, and an increase in phospho- Ser370-PTEN levels. Se also increased CK2 activity and the use of apigenin, an inhibitor of CK2, revealed that the regulation of the tumor suppressor PTEN by Se may be achieved via both the Trx-TR system and the RedOx control of the kinase involved in the regulation of PTEN activity.
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影响因子:
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