Article (Scientific journals)
Mutation in the Sip1 transcription factor leads to a disturbance of the preconditioning of AMPA receptors by episodes of hypoxia in neurons of the cerebral cortex due to changes in their activity and subunit composition. The protective effects of interleukin-10.
Turovskaya, Maria V; Zinchenko, Valery P; Babaev, Alexei A et al.
2018In Archives of Biochemistry and Biophysics, 654, p. 126-135
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Keywords :
Excitatory Amino Acid Agonists; IL10 protein, mouse; Nerve Tissue Proteins; Pyrimidines; Receptors, AMPA; Sip1 protein, mouse; Interleukin-10; 5-fluorowillardiine; EC 2.7.1.- (Phosphatidylinositol 3-Kinases); OF5P57N2ZX (Alanine); SY7Q814VUP (Calcium); Alanine/analogs & derivatives/pharmacology; Animals; Calcium/metabolism; Calcium Signaling; Cerebral Cortex/physiopathology; Enzyme Activation; Excitatory Amino Acid Agonists/pharmacology; Hypoxia/physiopathology; Interleukin-10/physiology; Mice; Microscopy, Fluorescence; Mutation; Nerve Tissue Proteins/genetics/physiology; Neurons/metabolism/physiology; Phosphatidylinositol 3-Kinases/metabolism; Pyrimidines/pharmacology; Receptors, AMPA/agonists/physiology; AMPA-Receptors; Calcium; Hypoxia; Mutants; Neurons; Preconditioning
Abstract :
[en] The Sip1 mutation plays the main role in pathogenesis of the Mowat-Wilson syndrome, which is characterized by the pronounced epileptic symptoms. Cortical neurons of homozygous mice with Sip1 mutation are resistant to AMPA receptor activators. Disturbances of the excitatory signaling components are also observed on such a phenomenon of neuroplasticity as hypoxic preconditioning. In this work, the mechanisms of loss of the AMPA receptor's ability to precondition by episodes of short-term hypoxia were investigated on cortical neurons derived from the Sip1 homozygous mice. The preconditioning effect was estimated by the level of suppression of the AMPA receptors activity with hypoxia episodes. Using fluorescence microscopy, we have shown that cortical neurons from the Sip1(fl/fl) mice are characterized by the absence of hypoxic preconditioning effect, whereas the amplitude of Ca(2+)-responses to the application of the AMPA receptor agonist, 5-Fluorowillardiine, in neurons from the Sip1 mice brainstem is suppressed by brief episodes of hypoxia. The mechanism responsible for this process is hypoxia-induced desensitization of the AMPA receptors, which is absent in the cortex neurons possessing the Sip1 mutation. However, the appearance of preconditioning in these neurons can be induced by phosphoinositide-3-kinase activation with a selective activator or an anti-inflammatory cytokine interleukin-10.
Disciplines :
Anatomy (cytology, histology, embryology...) & physiology
Author, co-author :
Turovskaya, Maria V;  Institute of Cell Biophysics, Russian Academy of Sciences, Russia.
Zinchenko, Valery P;  Institute of Cell Biophysics, Russian Academy of Sciences, Russia.
Babaev, Alexei A;  Institute of Biology and Biomedicine, Lobachevsky State University of Nizhniy
Epifanova, Ekaterina  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques ; Institute of Biology and Biomedicine, Lobachevsky State University of Nizhniy
Tarabykin, Victor S;  Institute of Biology and Biomedicine, Lobachevsky State University of Nizhniy
Turovsky, Egor A;  Institute of Cell Biophysics, Russian Academy of Sciences, Russia. Electronic
Language :
English
Title :
Mutation in the Sip1 transcription factor leads to a disturbance of the preconditioning of AMPA receptors by episodes of hypoxia in neurons of the cerebral cortex due to changes in their activity and subunit composition. The protective effects of interleukin-10.
Publication date :
15 September 2018
Journal title :
Archives of Biochemistry and Biophysics
ISSN :
0003-9861
eISSN :
1096-0384
Publisher :
Elsevier, Atlanta, Us ny
Volume :
654
Pages :
126-135
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright © 2018. Published by Elsevier Inc.
Available on ORBi :
since 24 May 2023

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