Results
Interestingly, we found that tau hyperphosphorylation at Thr231 was completely blocked by the Src family tyrosine kinase inhibitor, 4-amino-5-(4- chlorophenyl)-7(t-butyl)pyrazol(3,4-d)pyramide (PP1), and by the phosphatidylinositol 3-kinase inhibitor, LY294002 (Fig. 5). PubMed:17403556
Inhibition occurred even though ADDLs were still bound to cell surfaces, indicating that those kinases are involved in signal transduction coupling between ADDL binding and tau hyperphosphorylation. PubMed:17403556
Moreover, the presence of large extracellular aggregates in NU1-treated cultures (Fig. 5N) suggests that the antibody effectively sequesters ADDLs and prevents their interactions with neurons (Fig. 5O). No inhibition of ADDL binding was associated with PP1 and LY294002 (Fig. 5H, I, K and L, respectively), but both kinase inhibitors effectively blocked ADDL-induced tau hyperphosphorylation (Fig. 5G and J). PubMed:17403556
NU1 completely blocked the increase in P-Ser404 and P-Thr231 phosphotau levels induced by ADDLs (Fig. 3D–H). PubMed:17403556
Moreover, the presence of large extracellular aggregates in NU1-treated cultures (Fig. 5N) suggests that the antibody effectively sequesters ADDLs and prevents their interactions with neurons (Fig. 5O). No inhibition of ADDL binding was associated with PP1 and LY294002 (Fig. 5H, I, K and L, respectively), but both kinase inhibitors effectively blocked ADDL-induced tau hyperphosphorylation (Fig. 5G and J). PubMed:17403556
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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.