β-Amyloid regulates leptin expression and tau phosphorylation through the mTORC1 signaling pathway.
β-Amyloid regulates leptin expression and tau phosphorylation through the mTORC1 signaling pathway.
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DOI:
10.1111/j.1471-4159.2010.06929.x
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发表时间:
2010-10
影响因子:
4.7
通讯作者:
Ghribi O
中科院分区:
文献类型:
--
作者:
Marwarha G;Dasari B;Prabhakara JP;Schommer J;Ghribi O
High levels of the adipocytokine leptin are associated with reduced risk of Alzheimer’s disease (AD). Leptin treatment also reduces β-amyloid (Aβ) levels in in vivo and in vitro models of AD. Aβ and leptin interact with the Akt/mammalian target of rapamycin complex1 (mTORC1) signaling pathway. Akt/mTORC1 activation reduces tau phosphorylation through the inhibition of the downstream enzyme GSK-3β. mTORC1 also regulates translation of many proteins including leptin. While Aβ has been shown to inactivate Akt, inhibit mTORC1, and facilitate the phosphorylation of tau, leptin activates both Akt and mTORC1 and reduces tau phosphorylation. However, the extent to which Aβ may modulate leptin expression and increase tau phosphorylation involving Akt/mTORC1 has not been determined. In this study, we show that incubation of organotypic slices from rabbit hippocampus with Aβ downregulates leptin expression, inhibits Akt, activates GSK-3β, increases tau phosphorylation, and inactivates mTORC1. Leptin treatment reverses Aβ effects by alleviating Akt inhibition, preventing GSK-3β activation, reducing tau phosphorylation, and activating mTORC1. On the other hand, Rapamycin, an allosteric inhibitor of mTORC1, downregulates leptin expression, increases tau phosphorylation, and does not affect Akt and GSK-3β. Our results demonstrate for the first time that Aβ regulates leptin expression and tau phosphorylation through mTORC1.
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影响因子:
2.5
作者:
Greco SJ;Sarkar S;Casadesus G;Zhu X;Smith MA;Ashford JW;Johnston JM;Tezapsidis N
通讯作者:
Tezapsidis N
DOI:
10.1016/j.molbrainres.2003.09.001
发表时间:
2003-11-26
期刊:
MOLECULAR BRAIN RESEARCH
影响因子:
--
作者:
Ghribi, O;Prammonjago, P;Savory, J
通讯作者:
Savory, J
影响因子:
56.9
作者:
Cota, D;Proulx, K;Seeley, RJ
通讯作者:
Seeley, RJ
DOI:
10.3233/jad-2010-1308
发表时间:
2010
期刊:
Journal of Alzheimer's disease : JAD
影响因子:
--
作者:
Greco SJ;Bryan KJ;Sarkar S;Zhu X;Smith MA;Ashford JW;Johnston JM;Tezapsidis N;Casadesus G
通讯作者:
Casadesus G
影响因子:
4.2
作者:
Chen, Tsan-Ju;Wang, Dean-Chuan;Chen, Shun-Sheng
通讯作者:
Chen, Shun-Sheng