Acute Pharmacological Inhibition of Protein Kinase R-Like Endoplasmic Reticulum Kinase Signaling After Spinal Cord Injury Spares Oligodendrocytes and Improves Locomotor Recovery.

Acute Pharmacological Inhibition of Protein Kinase R-Like Endoplasmic Reticulum Kinase Signaling After Spinal Cord Injury Spares Oligodendrocytes and Improves Locomotor Recovery.
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脊髓损伤后蛋白激酶 R 样内质网激酶信号传导的急性药理学抑制可保护少突胶质细胞并改善运动恢复。

DOI:
10.1089/neu.2022.0177
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发表时间:
2023
影响因子:
4.2
通讯作者:
Whittemore,ScottR
Whittemore,ScottR
中科院分区:
医学2区
文献类型:
--
作者:
SaraswatOhri,Sujata;Andres,KarienaR;Howard,RussellM;Brown,BrandonL;Forston,MichaelD;Hetman,Michal;Whittemore,ScottR

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蛋白激酶R(PKR)样内质网蛋白激酶(PERK)是内质网应激反应(ERSR)途径的主要信号转导分子。PERK激活的结果从消除内质网应激到诱导细胞死亡,取决于其水平、持续时间和细胞环境。目前的数据表明,在小鼠脊髓损伤(SCI)后,小分子抑制剂GSK2656157急性抑制PERK(0-72 h)可降低ERSR,同时促进脑白质保留和后肢运动恢复。GSK2656157处理的小鼠显示损伤中心的少突胶质细胞数量增加。此外,GSK2656157还可保护原代培养的小鼠少突胶质前体细胞免受内质网应激诱导的细胞毒性。这些发现表明,在脊髓损伤的背景下,PERK的过度急性激活有助于功能相关的脑白质损伤。药物抑制PERK是保护包括脊髓损伤在内的急性损伤后中枢神经系统(CNS)白质的一种潜在策略。
Protein kinase R (PKR)-like endoplasmic reticulum kinase (PERK) is a major signal transducer of the endoplasmic reticulum stress response (ERSR) pathway. Outcomes of PERK activation range from abrogating ER stress to induction of cell death, dependent on its level, duration, and cellular context. Current data demonstrate that after mouse spinal cord injury (SCI), acute inhibition of PERK (0–72 h) with the small molecule inhibitor GSK2656157 reduced ERSR while improving white matter sparing and hindlimb locomotion recovery. GSK2656157-treated mice showed increased numbers of oligodendrocytes at the injury epicenter. Moreover, GSK2656157 protected cultured primary mouse oligodendrocyte precursor cells from ER stress-induced cytotoxicity. These findings suggest that in the context of SCI, excessive acute activation of PERK contributes to functionally relevant white matter damage. Pharmacological inhibition of PERK is a potential strategy to protect central nervous system (CNS) white matter following acute injuries, including SCI.
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