p(HGNC:GRIA1)
Soluble AβOs, but not monomers, mediate the internalization of the GluA1/GluA2 subunits by endocytosis (Zhang et al. 2011), leading to synaptic dysfunction (Hsieh et al. 2006). PubMed:29196815
Abetao exposure induced a translocation of tau into the PSD fraction (***p 0.0002, 2-tailed Student’s t test; control 20.12 1228 vs Abetao 29.74 1.748, N 12 independent culture). There was also an increase of PSD-95 (***p0.0006, 2-tailed Student’s t test; control 19.10 2.557 vs Abetao 33.3 2153, N 9 independent culture), GluA1 (**p 0.0078, 2-tailed Student’s t test; control 18.841.930 vs Abetao 26.221.475,N9 independent culture) and fyn (**p 0.0041, 2-tailed Student’s t test; control 19.42 1.337 vs Abetao 29.67 2.181, N 6 independent cultures; Fig. 6D). PubMed:24760868
We analyzed actin and tau in the PSD-enriched fraction from primary cortical neurons treated with jasplakinolide (Fig. 5E). We observed that increased neuronal F-actin content promotes concurrent tau enrichment (*p0.0150, 2-tailed Student’s t test; control 17.49 0.7755 vs jasplakinolide 27.02 2719, N 4 independent cultures; Fig. 5F). GLUA1, the membrane trafficking of which is known to be actin dependent, was increased (*p 0.0279, 2-tailed Student’s t test; control 16.91 1015 vs jasplakinolide 31.00 4.778, N 4 independent cultures). The amount of Fyn in the PSD was decreased (*p 0.0265, 2-tailed Student’s t test; control 27.25 5.003 vs jasplakinolide 11.71 1.786, N 4 independent cultures). PubMed:24760868
Therefore, during a long-lasting synaptic activation, we observed an increase in tau, fyn, actin, GluA1, and PSD-95 content in the PSD-positive fraction, which is consistent with the characteristic features of synaptic plasticity (Ehlers, 2003). PubMed:24760868
We observed a similar LTPinduced increase in tau content within the PSD-enriched fraction from CA1 synaptosomes (29.86 +-4.86 to 70.15 +- 4.86, **p = 0.0011; Fig. 3B). As expected, actin and GluA1 were also increased, strengthening the idea that tau is involved in synaptic reorganization processes necessary for synaptic plasticity PubMed:24760868
Similarly, the GluR1 subunits of a-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors (characteristic of mature spines and necessary for LTP and calcium signaling) decreased in the oligomer-treated samples up to 60%. PubMed:28528849
Therefore, during a long-lasting synaptic activation, we observed an increase in tau, fyn, actin, GluA1, and PSD-95 content in the PSD-positive fraction, which is consistent with the characteristic features of synaptic plasticity (Ehlers, 2003). PubMed:24760868
We observed a similar LTPinduced increase in tau content within the PSD-enriched fraction from CA1 synaptosomes (29.86 +-4.86 to 70.15 +- 4.86, **p = 0.0011; Fig. 3B). As expected, actin and GluA1 were also increased, strengthening the idea that tau is involved in synaptic reorganization processes necessary for synaptic plasticity PubMed:24760868
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If you find BEL Commons useful in your work, please consider citing: Hoyt, C. T., Domingo-Fernández, D., & Hofmann-Apitius, M. (2018). BEL Commons: an environment for exploration and analysis of networks encoded in Biological Expression Language. Database, 2018(3), 1–11.