GSK3β inhibition promotes synaptogenesis in Drosophila and mammalian neurons

PloS One
Germán CuestoAngel Acebes

Abstract

The PI3K-dependent activation of AKT results in the inhibition of GSK3β in most signaling pathways. These kinases regulate multiple neuronal processes including the control of synapse number as shown for Drosophila and rodents. Alzheimer disease's patients exhibit high levels of circulating GSK3β and, consequently, pharmacological strategies based on GSK3β antagonists have been designed. The approach, however, has yielded inconclusive results so far. Here, we carried out a comparative study in Drosophila and rats addressing the role of GSK3β in synaptogenesis. In flies, the genetic inhibition of the shaggy-encoded GSK3β increases the number of synapses, while its upregulation leads to synapse loss. Likewise, in three weeks cultured rat hippocampal neurons, the pharmacological inhibition of GSK3β increases synapse density and Synapsin expression. However, experiments on younger cultures (12 days) yielded an opposite effect, a reduction of synapse density. This unexpected finding seems to unveil an age- and dosage-dependent differential response of mammalian neurons to the stimulation/inhibition of GSK3β, a feature that must be considered in the context of human adult neurogenesis and pharmacological treatments for Alzheimer's di...Continue Reading

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Citations

Feb 16, 2016·Molecular and Cellular Therapies·Lilian Enriquez-Barreto, Miguel Morales
Dec 27, 2019·Molecular Biology of the Cell·Mercedes ArnésAlberto Ferrús
May 29, 2020·Disease Models & Mechanisms·Jung Hwan KimBing Ye
Jul 3, 2020·International Journal of Molecular Sciences·Xingyi ChengMingyao Yang
Oct 12, 2018·Journal of Neurogenetics·Alicia MansillaAlberto Ferrús
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Mar 6, 2018·Journal of Neuropathology and Experimental Neurology·Tao XiongDezhi Mu
May 18, 2020·Current Topics in Medicinal Chemistry·Pankaj WadhwaHemant R Jadhav

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Methods Mentioned

BETA
transfection
protein assay
confocal microscopy

Software Mentioned

GraphPad Prism
Image J
Point Picker
Quantity One
Acoloma

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