Zinc chelation induces rapid depletion of the X-linked inhibitor of apoptosis and sensitizes prostate cancer cells to TRAIL-mediated apoptosis.
Zinc chelation induces rapid depletion of the X-linked inhibitor of apoptosis and sensitizes prostate cancer cells to TRAIL-mediated apoptosis.
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DOI:
10.1038/cdd.2008.106
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发表时间:
2008-11
影响因子:
12.4
通讯作者:
Kolenko, V. M.
中科院分区:
文献类型:
--
作者:
Makhov, P.;Golovine, K.;Uzzo, R. G.;Rothman, J.;Crispen, P. L.;Shaw, T.;Scoll, B. J.;Kolenko, V. M.
X-linked inhibitor of apoptosis (XIAP), the most potent member of the inhibitor of apoptosis protein (IAP) family of endogenous caspase inhibitors, blocks the initiation and execution phases of the apoptotic cascade. As such, XIAP represents an attractive target for treating apoptosis-resistant forms of cancer. Here, we demonstrate that treatment with the membrane-permeable zinc chelator, N,N,N’,N’,-tetrakis(2-pyridylmethyl) ethylenediamine (TPEN) induces a rapid depletion of XIAP at the posttranslational level in human PC-3 prostate cancer cells and several non-prostate cell lines. The depletion of XIAP is selective, as TPEN has no effect on the expression of other zinc-binding members of the IAP family including cIAP1, cIAP2, and survivin. The down-regulation of XIAP in TPEN-treated cells occurs via proteasome-and caspase-independent mechanisms and is completely prevented by the serine protease inhibitor, Pefabloc. Finally, our studies demonstrate that TPEN promotes activation of caspases-3 and -9 and sensitizes PC-3 prostate cancer cells to TRAIL-mediated apoptosis. Taken together, our findings indicate that zinc-chelating agents may be used to sensitize malignant cells to established cytotoxic agents via down-regulation of XIAP.
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影响因子:
56.9
作者:
Yang, Y;Fang, SY;Ashwell, JD
通讯作者:
Ashwell, JD
DOI:
10.1073/pnas.96.5.1936
发表时间:
1999-03-02
影响因子:
11.1
作者:
Maret, W;Jacob, C;Fischer, EH
通讯作者:
Fischer, EH
影响因子:
50.3
作者:
Schimmer, AD;Welsh, K;Reed, JC
通讯作者:
Reed, JC
影响因子:
11.4
作者:
Deveraux, QL;Leo, E;Reed, JC
通讯作者:
Reed, JC
影响因子:
12.4
作者:
Hentze, H;Lin, XY;Porter, AG
通讯作者:
Porter, AG