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Molecular Research on Ischemic Stroke

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Neurobiology".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 2990

Special Issue Editor


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Guest Editor
Department of Neurosurgery, Nara Medical University, Kashihara, Japan
Interests: endovascular neuroradiology; cerebral blood flow and metabolism; ischemic stroke

Special Issue Information

Dear Colleagues,

Acute ischemic stroke (AIS) is one of the most common causes of the need for care. A lot of basic and clinical research studies have been conducted on brain protection therapy for AIS. Brain tissue is composed of two major components: various intraparenchymal cellular systems and microcirculatory systems. In the microcirculatory system, secondary microcirculatory disorders, mainly vascular endothelial injury, have been elucidated, and their clinical application to antithrombotic therapy for AIS has been realized. On the other hand, with the recent development of molecular biology and genetic engineering techniques, the focus of research on the pathogenesis of ischemia in the parenchymal cell system has rapidly shifted to the cellular, intracellular organelle, and molecular levels, and many research results have been accumulated. In addition, the establishment of experimental models of ischemia in vitro, the pathophysiology of neuronal cell death such as apoptosis, regeneration of neural tissues, and ischemic tolerance have become of great interest, and the pathogenesis of cerebral ischemia has become one of the most important research topics in the field of neuroscience. This Special Issue of IJMS aims to focus on both basic science and translational research that will lead from molecular biological approaches to AIS to therapies for this condition. 

Dr. Ichiro Nakagawa
Guest Editor

Manuscript Submission Information

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Keywords

  • Acute ischemic stroke
  • Neuronal regeneration
  • Ischemic tolerance
  • Mitochondrial dysfunction
  • Neurovascular unit

Published Papers (1 paper)

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Research

17 pages, 2967 KiB  
Article
Phosphorylation of Eukaryotic Initiation Factor 4G1 (eIF4G1) at Ser1147 Is Specific for eIF4G1 Bound to eIF4E in Delayed Neuronal Death after Ischemia
by Emma Martínez-Alonso, Natalia Guerra-Pérez, Alejandro Escobar-Peso, Lorena Peracho, Rocío Vera-Lechuga, Antonio Cruz-Culebras, Jaime Masjuan and Alberto Alcázar
Int. J. Mol. Sci. 2022, 23(3), 1830; https://doi.org/10.3390/ijms23031830 - 6 Feb 2022
Cited by 3 | Viewed by 2496
Abstract
Ischemic strokes are caused by a reduction in cerebral blood flow and both the ischemic period and subsequent reperfusion induce brain injury, with different tissue damage depending on the severity of the ischemic insult, its duration, and the particular areas of the brain [...] Read more.
Ischemic strokes are caused by a reduction in cerebral blood flow and both the ischemic period and subsequent reperfusion induce brain injury, with different tissue damage depending on the severity of the ischemic insult, its duration, and the particular areas of the brain affected. In those areas vulnerable to cerebral ischemia, the inhibition of protein translation is an essential process of the cellular response leading to delayed neuronal death. In particular, translation initiation is rate-limiting for protein synthesis and the eukaryotic initiation factor (eIF) 4F complex is indispensable for cap-dependent protein translation. In the eIF4F complex, eIF4G is a scaffolding protein that provides docking sites for the assembly of eIF4A and eIF4E, binding to the cap structure of the mRNA and stabilizing all proteins of the complex. The eIF4F complex constituents, eIF4A, eIF4E, and eIF4G, participate in translation regulation by their phosphorylation at specific sites under cellular stress conditions, modulating the activity of the cap-binding complex and protein translation. This work investigates the phosphorylation of eIF4G1 involved in the eIF4E/eIF4G1 association complex, and their regulation in ischemia-reperfusion (IR) as a stress-inducing condition. IR was induced in an animal model of transient cerebral ischemia and the results were studied in the resistant cortical region and in the vulnerable hippocampal CA1 region. The presented data demonstrate the phosphorylation of eIF4G1 at Ser1147, Ser1185, and Ser1231 in both brain regions and in control and ischemic conditions, being the phosphorylation of eIF4G1 at Ser1147 the only one found in the eIF4E/eIF4G association complex from the cap-containing matrix (m7GTP-Sepharose). In addition, our work reveals the specific modulation of the phosphorylation of eIF4G1 at Ser1147 in the vulnerable region, with increased levels and colocalization with eIF4E in response to IR. These findings contribute to elucidate the molecular mechanism of protein translation regulation that underlies in the balance of cell survival/death during pathophysiological stress, such as cerebral ischemia. Full article
(This article belongs to the Special Issue Molecular Research on Ischemic Stroke)
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