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Restored glial glutamate transporter EAAT2 function as a potential therapeutic approach for Alzheimer's disease.

The Journal of experimental medicine (2015-02-26)
Kou Takahashi, Qiongman Kong, Yuchen Lin, Nathan Stouffer, Delanie A Schulte, Liching Lai, Qibing Liu, Ling-Chu Chang, Sky Dominguez, Xuechao Xing, Gregory D Cuny, Kevin J Hodgetts, Marcie A Glicksman, Chien-Liang Glenn Lin
ABSTRACT

Glutamatergic systems play a critical role in cognitive functions and are known to be defective in Alzheimer's disease (AD) patients. Previous literature has indicated that glial glutamate transporter EAAT2 plays an essential role in cognitive functions and that loss of EAAT2 protein is a common phenomenon observed in AD patients and animal models. In the current study, we investigated whether restored EAAT2 protein and function could benefit cognitive functions and pathology in APPSw,Ind mice, an animal model of AD. A transgenic mouse approach via crossing EAAT2 transgenic mice with APPSw,Ind. mice and a pharmacological approach using a novel EAAT2 translational activator, LDN/OSU-0212320, were conducted. Findings from both approaches demonstrated that restored EAAT2 protein function significantly improved cognitive functions, restored synaptic integrity, and reduced amyloid plaques. Importantly, the observed benefits were sustained one month after compound treatment cessation, suggesting that EAAT2 is a potential disease modifier with therapeutic potential for AD.

MATERIALS
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