CaMKII is involved in cadmium activation of MAPK and mTOR pathways leading to neuronal cell death.
CaMKII is involved in cadmium activation of MAPK and mTOR pathways leading to neuronal cell death.
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CaMKII 参与镉激活 MAPK 和 mTOR 通路,导致神经元细胞死亡
DOI:
10.1111/j.1471-4159.2011.07493.x
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发表时间:
2011-12
影响因子:
4.7
通讯作者:
Chen L
中科院分区:
文献类型:
--
作者:
Chen S;Xu Y;Xu B;Guo M;Zhang Z;Liu L;Ma H;Chen Z;Luo Y;Huang S;Chen L
Cadmium (Cd), a toxic environmental contaminant, induces neurodegenerative diseases. Recently we have shown that Cd elevates intracellular free calcium ion ([Ca2+]i) level, leading to neuronal apoptosis partly by activating mitogen-activated protein kinases (MAPK) and mammalian target of rapamycin (mTOR) pathways. However, the underlying mechanism remains to be elucidated. Here we show that the effects of Cd elevated [Ca2+]i on MAPK and mTOR network as well as neuronal cell death are through stimulating phosphorylation of calcium/calmodulin-dependent protein kinase II (CaMKII). This is supported by the findings that chelating intracellular Ca2+ with BAPTA/AM or preventing Cd-induced [Ca2+]i elevation using 2-aminoethoxydiphenyl borate (2-APB) blocked Cd activation of CaMKII. Inhibiting CaMKII with KN93 or silencing CaMKII attenuated Cd activation of MAPK/mTOR pathways and cell death. Furthermore, inhibitors of mTOR (rapamycin), JNK (SP600125) and Erk1/2 (U0126), but not of p38 (PD169316), prevented Cd-induced neuronal cell death in part through inhibition of [Ca2+]i elevation and CaMKII phosphorylation. The results indicate that Cd activates MAPK/mTOR network triggering neuronal cell death, by stimulating CaMKII. Our findings underscore a central role of CaMKII in the neurotoxicology of Cd, and suggest that manipulation of intracellular Ca2+ level or CaMKII activity may be exploited for prevention of Cd-induced neurodegenerative disorders.
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影响因子:
3.6
作者:
Braun, FJ;Aziz, O;Putney, JW
通讯作者:
Putney, JW
影响因子:
56.9
作者:
Fang, YM;Vilella-Bach, M;Chen, J
通讯作者:
Chen, J
影响因子:
7.4
作者:
Chen, Long;Xu, Baoshan;Liu, Lei;Luo, Van;Zhou, Hongyu;Chen, Wenxing;Shen, Tao;Han, Xiuzhen;Kontos, Christopher D.;Huang, Shile
通讯作者:
Huang, Shile
影响因子:
4.8
作者:
Fladmark, KE;Brustugun, OT;Doskeland, SO
通讯作者:
Doskeland, SO
DOI:
10.1111/j.1749-6632.1993.tb18286.x
发表时间:
1993-05-28
影响因子:
5.2
作者:
GIBBONS, SJ;BRORSON, JR;MILLER, RJ
通讯作者:
MILLER, RJ