Impaired expression of GABA transporters in the human Alzheimer's disease hippocampus, subiculum, entorhinal cortex and superior temporal gyrus

TE Fuhrer, TH Palpagama, HJ Waldvogel, BJL Synek… - Neuroscience, 2017 - Elsevier
TE Fuhrer, TH Palpagama, HJ Waldvogel, BJL Synek, C Turner, RL Faull, A Kwakowsky
Neuroscience, 2017Elsevier
Gamma-aminobutyric acid (GABA) is the main inhibitory neurotransmitter in the brain and
plays an important role in regulating neuronal excitability. GABA reuptake from the synapse
is dependent on specific transporters–mainly GAT-1, GAT-3 and BGT-1 (GATs). This study is
the first to show alterations in the expression of the GATs in the Alzheimer's disease (AD)
hippocampus, entorhinal cortex and superior temporal gyrus. We found a significant
increase in BGT-1 expression associated with AD in all layers of the dentate gyrus, in the …
Abstract
Gamma-aminobutyric acid (GABA) is the main inhibitory neurotransmitter in the brain and plays an important role in regulating neuronal excitability. GABA reuptake from the synapse is dependent on specific transporters – mainly GAT-1, GAT-3 and BGT-1 (GATs). This study is the first to show alterations in the expression of the GATs in the Alzheimer’s disease (AD) hippocampus, entorhinal cortex and superior temporal gyrus. We found a significant increase in BGT-1 expression associated with AD in all layers of the dentate gyrus, in the stratum oriens of the CA2 and CA3 and the superior temporal gyrus. In AD there was a significant decrease in GAT-1 expression in the entorhinal cortex and superior temporal gyrus. We also found a significant decrease in GAT-3 immunoreactivity in the stratum pyramidale of the CA1 and CA3, the subiculum and entorhinal cortex. These observations indicate that the expression of the GATs shows brain-region- and layer-specific alterations in AD, suggesting a complex activation pattern of different GATs during the course of the disease.
Elsevier
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