Abstract
Amyloid-β protein (Aβ) neurotoxicity occurs along with the reorganization of the actin-cytoskeleton through the activation of the Rho GTPase pathway. In addition to the classical mode of action of the non-steroidal anti-inflammatory drugs (NSAIDs), indomethacin, and ibuprofen have Rho-inhibiting effects. In order to evaluate the role of the Rho GTPase pathway on Aβ-induced neuronal death and on neuronal morphological modifications in the actin cytoskeleton, we explored the role of NSAIDS in human-differentiated neuroblastoma cells exposed to Aβ. We found that Aβ induced neurite retraction and promoted the formation of different actin-dependent structures such as stress fibers, filopodia, lamellipodia, and ruffles. In the presence of Aβ, both NSAIDs prevented neurite collapse and formation of stress fibers without affecting the formation of filopodia and lamellipodia. Similar results were obtained when the downstream effector, Rho kinase inhibitor Y27632, was applied in the presence of Aβ. These results demonstrate the potential benefits of the Rho-inhibiting NSAIDs in reducing Aβ-induced effects on neuronal structural alterations.






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Acknowledgements
This work was supported in part by grants to CA (PAPIIT IN202615) and to AZ (PAPIIT IN203015).
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C. Arias contributed to conception and design and wrote the manuscript. P. Ferrera and A. Zepeda performed experiments and data analysis.
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Ferrera, P., Zepeda, A. & Arias, C. Nonsteroidal anti-inflammatory drugs attenuate amyloid-β protein-induced actin cytoskeletal reorganization through Rho signaling modulation. Cell Mol Neurobiol 37, 1311–1318 (2017). https://doi.org/10.1007/s10571-017-0467-3
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DOI: https://doi.org/10.1007/s10571-017-0467-3