Stimulation of EphB2 attenuates tau phosphorylation through PI3K/Akt-mediated inactivation of glycogen synthase kinase-3β.
Stimulation of EphB2 attenuates tau phosphorylation through PI3K/Akt-mediated inactivation of glycogen synthase kinase-3β.
复制标题
EphB2 的刺激通过 PI3K/Akt 介导的糖原合成酶激酶 3β 失活来减弱 tau 磷酸化
DOI:
10.1038/srep11765
复制
发表时间:
2015-06-29
影响因子:
4.6
通讯作者:
Wang JZ
中科院分区:
文献类型:
--
作者:
Jiang J;Wang ZH;Qu M;Gao D;Liu XP;Zhu LQ;Wang JZ
Abnormal tau hyperphosphorylation is an early pathological marker of Alzheimer’s disease (AD), however, the upstream factors that regulate tau phosphorylation are not illustrated and there is no efficient strategy to arrest tau hyperphosphorylation. Here, we find that activation of endogenous EphB2 receptor by ligand stimulation (ephrinB1/Fc) or by ectopic expression of EphB2 plus the ligand stimulation induces a remarkable tau dephosphorylation at multiple AD-associated sites in SK-N-SH cells and human embryonic kidney cells that stably express human tau (HEK293-tau). In cultured hippocampal neurons and the hippocampus of human tau transgenic mice, dephosphorylation of tau proteins was also detected by stimulation of EphB2 receptor. EphB2 activation inhibits glycogen synthase kinase-3β (GSK-3β), a crucial tau kinase, and activates phosphatidylinositol-3-kinase (PI3K)/Akt both in vitro and in vivo, whereas simultaneous inhibition of PI3K or upregulation of GSK-3β abolishes the EphB2 stimulation-induced tau dephosphorylation. Finally, we confirm that ephrinB1/Fc treatment induces tyrosine phosphorylation (activation) of EphB2, while deletion of the tyrosine kinase domain (VM) of EphB2 eliminates the receptor stimulation-induced GSK-3β inhibition and tau dephosphorylation. We conclude that activation of EphB2 receptor kinase arrests tau hyperphosphorylation through PI3K-/Akt-mediated GSK-3β inhibition. Our data provide a novel membranous target to antagonize AD-like tau pathology.
登录
查看更多内容
影响因子:
12.7
作者:
Braak, Heiko;Del Tredici, Kelly
通讯作者:
Del Tredici, Kelly
影响因子:
64.5
作者:
Dalva, MB;Takasu, MA;Greenberg, ME
通讯作者:
Greenberg, ME
DOI:
10.1073/pnas.93.7.2719
发表时间:
1996-04-02
影响因子:
11.1
作者:
Hoshi, M;Takashima, A;Imahori, K
通讯作者:
Imahori, K
影响因子:
4.7
作者:
Bouvier, David;Corera, Amadou T.;Doucet, Guy
通讯作者:
Doucet, Guy
影响因子:
9.9
作者:
ARRIAGADA, PV;GROWDON, JH;HYMAN, BT
通讯作者:
HYMAN, BT