Intracellular accumulation of tau oligomers in astrocytes and their synaptotoxic action rely on Amyloid Precursor Protein Intracellular Domain-dependent expression of Glypican-4.
Intracellular accumulation of tau oligomers in astrocytes and their synaptotoxic action rely on Amyloid Precursor Protein Intracellular Domain-dependent expression of Glypican-4.
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DOI：
10.1016/j.pneurobio.2023.102482
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发表时间：
2023-08
影响因子：
6.7
通讯作者：
Grassi, Claudio
中科院分区：
文献类型：
--
作者：
Puliatti, Giulia;Puma, Domenica Donatella Li;Aceto, Giuseppe;Lazzarino, Giacomo;Acquarone, Erica;Mangione, Renata;'Adamio, Luciano;Ripoli, Cristian;Arancio, Ottavio;Piacentini, Roberto;Grassi, Claudio
Several studies including ours reported the detrimental effects of extracellular tau oligomers (ex-oTau) on glutamatergic synaptic transmission and plasticity. Astrocytes greatly internalize ex-oTau whose intracellular accumulation alters neuro/gliotransmitter handling thereby negatively affecting synaptic function. Both amyloid precursor protein (APP) and heparan sulfate proteoglycans (HSPGs) are required for oTau internalization in astrocytes but the molecular mechanisms underlying this phenomenon have not been clearly identified yet. Here we found that a specific antibody anti-glypican 4 (GPC4), a receptor belonging to the HSPG family, significantly reduced oTau uploading from astrocytes and prevented oTau-induced alterations of Ca2+-dependent gliotransmitter release. As such, anti-GPC4 spared neurons co-cultured with astrocytes from the astrocyte-mediated synaptotoxic action of ex-oTau, thus preserving synaptic vesicular release, synaptic protein expression and hippocampal LTP at CA3-CA1 synapses. Of note, the expression of GPC4 depended on APP and, in particular, on its C-terminal domain, AICD, that we found to bind Gpc4 promoter. Accordingly, GPC4 expression was significantly reduced in mice in which either APP was knocked-out or it contained the non-phosphorylatable amino acid alanine replacing threonine 688, thus becoming unable to produce AICD. Collectively, our data indicate that GPC4 expression is APP/AICD-dependent, it mediates oTau accumulation in astrocytes and the resulting synaptotoxic effects.
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影响因子：
4.8
作者：
Kolay, Sourav;Vega, Anthony R.;Dodd, Dana A.;Perez, Valerie A.;Kashmer, Omar M.;White, Charles L.;Diamond, Marc I.
通讯作者：
Diamond, Marc I.
影响因子：
15.1
作者：
Lasagna-Reeves CA;Castillo-Carranza DL;Sengupta U;Clos AL;Jackson GR;Kayed R
通讯作者：
Kayed R
影响因子：
4.6
作者：
Lalo U;Palygin O;Verkhratsky A;Grant SG;Pankratov Y
通讯作者：
Pankratov Y
影响因子：
6.2
作者：
Li Puma, Domenica Donatella;Marcocci, Maria Elena;Grassi, Claudio
通讯作者：
Grassi, Claudio
影响因子：
3.7
作者：
Lombino F;Biundo F;Tamayev R;Arancio O;D'Adamio L
通讯作者：
D'Adamio L