EEF1A2 siRNA Suppresses MPP<sup>+</sup>-Induced Activation of Akt and mTOR and Potentiates Caspase-3 Activation in a Parkinson's Disease Model
Issued Date
2023-01-01
Resource Type
ISSN
23566140
eISSN
1537744X
Scopus ID
2-s2.0-85152348831
Pubmed ID
37051183
Journal Title
Scientific World Journal
Volume
2023
Rights Holder(s)
SCOPUS
Bibliographic Citation
Scientific World Journal Vol.2023 (2023)
Suggested Citation
Khwanraj K., Prommahom A., Dharmasaroja P. EEF1A2 siRNA Suppresses MPP<sup>+</sup>-Induced Activation of Akt and mTOR and Potentiates Caspase-3 Activation in a Parkinson's Disease Model. Scientific World Journal Vol.2023 (2023). doi:10.1155/2023/1335201 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/81884
Title
EEF1A2 siRNA Suppresses MPP<sup>+</sup>-Induced Activation of Akt and mTOR and Potentiates Caspase-3 Activation in a Parkinson's Disease Model
Author(s)
Author's Affiliation
Other Contributor(s)
Abstract
The tissue-specific protein eEF1A2 has been linked to the development of neurological disorders. The role of eEF1A2 in the pathogenesis of Parkinson's disease (PD) has yet to be investigated. The aim of this study was to determine the potential neuroprotective effects of eEF1A2 in an MPP+ model of PD. Differentiated SH-SY5Y cells were transfected with eEF1A2 siRNA, followed by MPP+ exposure. The expression of p-Akt1 and p-mTORC1 was determined using Western blotting. The expression of p53, Bax, Bcl-2, and caspase-3 was evaluated using qRT-PCR. Cleaved caspase-3 levels and Annexin V/propidium iodide flow cytometry were used to determine apoptosis. The effects of PI3K inhibition were examined. The results showed that eEF1A2 siRNA significantly reduced the eEF1A2 expression induced by MPP+. MPP+ treatment activated Akt1 and mTORC1; however, eEF1A2 knockdown suppressed this activation. In eEF1A2-knockdown cells, MPP+ treatment increased the expression of p53 and caspase-3 mRNA levels as well as increased apoptotic cell death when compared to MPP+ treatment alone. In cells exposed to MPP+, upstream inhibition of the Akt/mTOR pathway, by either LY294002 or wortmannin, inhibited the phosphorylation of Akt1 and mTORC1. Both PI3K inhibitors increased eEF1A2 expression in cells, whether or not they were also treated with MPP+. In conclusion, eEF1A2 may function as a neuroprotective factor against MPP+, in part by regulating the Akt/mTOR pathway upstream.