Nitric oxide-dependent pro-oxidant and pro-apoptotic effect of metallothioneins in HL-60 cells challenged with cupric nitrilotriacetate.
Nitric oxide-dependent pro-oxidant and pro-apoptotic effect of metallothioneins in HL-60 cells challenged with cupric nitrilotriacetate.
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金属硫蛋白在用次氮基三乙酸铜攻击的 HL-60 细胞中具有一氧化氮依赖性促氧化和促凋亡作用。
DOI:
10.1042/0264-6021:3540397
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发表时间:
2001
期刊:
影响因子:
--
通讯作者:
Kagan,VE
中科院分区:
文献类型:
--
作者:
Liu,S;Kawai,K;Tyurin,VA;Tyurina,YY;Borisenko,GG;Fabisiak,JP;Quinn,PJ;Pitt,BR;Kagan,VE
Intracellular safeguarding functions of metallothioneins (MTs) include sequestering transition and heavy metals, scavenging free radicals and protecting against electrophiles. We report that MT protection against Cu-induced cytotoxicity can be reversed and pro-oxidant and pro-apoptotic effects can be induced in HL-60 cells exposed to NO. We demonstrate that in ZnCl2-pretreated HL-60 cells loaded with copper nitrilotriacetate (Cu-NTA), exposure to an NO donor,S-nitroso-N-acetyl penicillamine, resulted in S-nitrosylation and oxidation of MT cysteines. This disruption of MT Cu-binding thiolate clusters caused loosening and release of redox-active Cu, enhanced redox-cycling activity of Cu and increased peroxidation of major classes of membrane phospholipids. We also found that Cu-induced oxidative stress in ZnCl2-pretreated/Cu-NTA-loaded HL-60 cells was accompanied by apoptosis documented by characteristic changes of nuclear morphology, internucleosomal DNA cleavage, externalization of phosphatidylserine, release of cytochromecfrom mitochondria into cytosol and activation of caspase-3. We conclude that in Cu-challenged cells, NO can reverse the protective role of MTs and convert them into pro-oxidant, pro-apoptotic implements.
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DOI:
10.1016/s0021-9258(18)89027-5
发表时间:
1985-05
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
K. Nielson;C L Atkin;D. R. Winge
通讯作者:
K. Nielson;C L Atkin;D. R. Winge
影响因子:
10.4
作者:
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Sens DA
DOI:
10.1152/ajpcell.1997.272.2.c675
发表时间:
1997
期刊:
The American journal of physiology.
影响因子:
--
作者:
Fabisiak,JP;Kagan,VE;Ritov,VB;Johnson,DE;Lazo,JS
通讯作者:
Lazo,JS
影响因子:
3.9
作者:
Fabisiak, JP;Tyurin, VA;Kagan, VE
通讯作者:
Kagan, VE
影响因子:
2.9
作者:
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E. Rudnicki