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神经炎症是否是中风后继发性神经退行性变的关键驱动因素?

Neuroinflammation as a Key Driver of Secondary Neurodegeneration Following Stroke?

机构信息

Discipline of Anatomy and Pathology, School of Biomedicine, Faculty of Health and Medical Sciences, The University of Adelaide, Adelaide 5005, Australia.

School of Pharmacy, Monash University Malaysia, Subang Jaya 47500, Malaysia.

出版信息

Int J Mol Sci. 2021 Dec 3;22(23):13101. doi: 10.3390/ijms222313101.

Abstract

Ischaemic stroke involves the rapid onset of focal neurological dysfunction, most commonly due to an arterial blockage in a specific region of the brain. Stroke is a leading cause of death and common cause of disability, with over 17 million people worldwide suffering from a stroke each year. It is now well-documented that neuroinflammation and immune mediators play a key role in acute and long-term neuronal tissue damage and healing, not only in the infarct core but also in distal regions. Importantly, in these distal regions, termed sites of secondary neurodegeneration (SND), spikes in neuroinflammation may be seen sometime after the initial stroke onset, but prior to the presence of the neuronal tissue damage within these regions. However, it is key to acknowledge that, despite the mounting information describing neuroinflammation following ischaemic stroke, the exact mechanisms whereby inflammatory cells and their mediators drive stroke-induced neuroinflammation are still not fully understood. As a result, current anti-inflammatory treatments have failed to show efficacy in clinical trials. In this review we discuss the complexities of post-stroke neuroinflammation, specifically how it affects neuronal tissue and post-stroke outcome acutely, chronically, and in sites of SND. We then discuss current and previously assessed anti-inflammatory therapies, with a particular focus on how failed anti-inflammatories may be repurposed to target SND-associated neuroinflammation.

摘要

缺血性中风涉及局灶性神经功能障碍的迅速发作,最常见的原因是大脑特定区域的动脉阻塞。中风是死亡的主要原因和残疾的常见原因,全球每年有超过 1700 万人患有中风。现在已有充分的证据表明,神经炎症和免疫介质在急性和长期神经元组织损伤和修复中发挥着关键作用,不仅在梗死核心区,而且在远隔区也是如此。重要的是,在这些远隔区,称为继发性神经退行性变(SND)部位,在初始中风发作后一段时间,但在这些区域出现神经元组织损伤之前,可能会出现神经炎症的激增。然而,必须承认,尽管有越来越多的信息描述了缺血性中风后的神经炎症,但炎症细胞及其介质驱动中风诱导的神经炎症的确切机制仍不完全清楚。因此,目前的抗炎治疗在临床试验中未能显示出疗效。在这篇综述中,我们讨论了中风后神经炎症的复杂性,特别是它如何在急性、慢性和 SND 部位影响神经元组织和中风后的结果。然后,我们讨论了当前和以前评估的抗炎治疗方法,特别关注失败的抗炎药如何被重新用于靶向 SND 相关的神经炎症。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a6c3/8658328/08a847b5af66/ijms-22-13101-g001.jpg

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