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Neurobiology of Disease
Article . 2021 . Peer-reviewed
License: CC BY NC ND
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Neurobiology of Disease
Article
License: CC BY NC ND
Data sources: UnpayWall
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Neurobiology of Disease
Article . 2021
Data sources: DOAJ
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SGK1.1 limits brain damage after status epilepticus through M current-dependent and independent mechanisms

Authors: Elva Martin-Batista; Laura E. Maglio; Natalia Armas-Capote; Guadalberto Hernández; Diego Alvarez de la Rosa; Teresa Giraldez;

SGK1.1 limits brain damage after status epilepticus through M current-dependent and independent mechanisms

Abstract

Epilepsy is a neurological condition associated to significant brain damage produced by status epilepticus (SE) including neurodegeneration, gliosis and ectopic neurogenesis. Reduction of these processes constitutes a useful strategy to improve recovery and ameliorate negative outcomes after an initial insult. SGK1.1, the neuronal isoform of the serum and glucocorticoids-regulated kinase 1 (SGK1), has been shown to increase M-current density in neurons, leading to reduced excitability and protection against seizures. For this study, we used 4-5 months old male transgenic C57BL/6 J and FVB/NJ mice expressing near physiological levels of a constitutively active form of the kinase controlled by its endogenous promoter. Here we show that SGK1.1 activation potently reduces levels of neuronal death (assessed using Fluoro-Jade C staining) and reactive glial activation (reported by GFAP and Iba-1 markers) in limbic regions and cortex, 72 h after SE induced by kainate, even in the context of high seizure activity. This neuroprotective effect is not exclusively through M-current activation but is also directly linked to decreased apoptosis levels assessed by TUNEL assays and quantification of Bim and Bcl-xL by western blot of hippocampal protein extracts. Our results demonstrate that this newly described antiapoptotic role of SGK1.1 activation acts synergistically with the regulation of cellular excitability, resulting in a significant reduction of SE-induced brain damage in areas relevant to epileptogenesis.

Related Organizations
Keywords

Neurons, Epilepsy, Kainic Acid, KA-induced seizures, Cell Survival, Calcium-Binding Proteins, Microfilament Proteins, Neurosciences. Biological psychiatry. Neuropsychiatry, Apoptosis, Mice, Transgenic, Serum and glucocorticoid-regulated kinase 1, Protein Serine-Threonine Kinases, Neuroprotection, Immediate-Early Proteins, Mice, Status Epilepticus, Glial Fibrillary Acidic Protein, Excitatory Amino Acid Agonists, Animals, Gliosis, Kv7 potassium channels, Neuroglia, RC321-571

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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
7
Top 10%
Average
Top 10%
gold