Syndecan-4 regulates subcellular localization of mTOR Complex2 and Akt activation in a PKCalpha-dependent manner in endothelial cells.
Syndecan-4 regulates subcellular localization of mTOR Complex2 and Akt activation in a PKCalpha-dependent manner in endothelial cells.
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Syndecan-4 在内皮细胞中以 PKCα 依赖性方式调节 mTOR Complex2 的亚细胞定位和 Akt 激活。
DOI:
10.1016/j.molcel.2008.09.010
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发表时间:
2008-10-10
期刊:
影响因子:
16
通讯作者:
Simons, Michael
中科院分区:
文献类型:
--
作者:
Partovian, Chohreh;Ju, Rong;Zhuang, Zhen W.;Martin, Kathleen A.;Simons, Michael
Mammalian target of rapamycin (mTOR) activity is regulated by assembly of two functionally distinct complexes, mTORC1 and mTORC2. In syndecan-4 (S4) null endothelial cells, mTORC2 activity is reduced, resulting in decreased Akt activation, while mTORC1 activity is increased. Levels of rictor, mLST8, and mSin-1 are unchanged in total cell lysates but decreased in the rafts of S4−/− endothelial cells, as is the level of PKCα. Expression of myristoylated-PKCα in S4−/− cells restores rictor, mLST8, and mSin-1 presence in the rafts and rescues Akt phosphorylation. PKCα knockdown mimics the effect of S4 deletion on mTORC2 localization and Akt activation. Reduced mTORC2 activity in S4−/− endothelial cells results in decreased FOXO1/3a and eNOS phosphorylation, decreased endothelial cell size and increased arterial blood pressure in S4−/− mice. Thus, S4-dependent targeting of PKCα to the plasma membrane is required for recruitment of mTORC2 components to the rafts and Akt activation.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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DOI:
10.1083/jcb.146.5.1147
发表时间:
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期刊:
The Journal of cell biology
影响因子:
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DOI:
10.1152/ajprenal.0144.2001
发表时间:
2002-01-01
影响因子:
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作者:
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通讯作者:
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