Knockdown of RUNX2 Attenuated A1 Astrocyte Overactivation, Brain Injury, and Cerebral Edema During Ischemic Stroke.

IF 3.3 4区 医学 Q2 NEUROSCIENCES
Zhibing Ai, Wei Huang, Wei Hu, Ran An, Gongwen Lei, Wen Gu, Xiaoqin Peng, Yong Liu
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引用次数: 0

Abstract

Although researchers began to unravel the potential significance of Runt-related transcription factor 2 (RUNX2) in some of neurological diseases, the role of RUNX2 in ischemic stroke remained unclear. Blood samples and clinical information were collected from stroke patients and control subjects. Besides, middle cerebral artery occlusion (MCAO) mice model and astrocytes oxygen-glucose deprivation/reperfusion (OGD/R) were established to simulate the pathological process of stroke in vivo and in vitro. Loss-of-function assay was used to assess the effect of RUNX2 on astrocytes function. HE staining and Nissl staining were used to examine the histopathological changes of brain tissues in mice. TTC staining was used to measure the cerebral infarct volume in mice. Morri's water maze test, the corner turn test, and the balance beam test were performed to evaluate neurobehavioral performances of mice. The results showed that the expression and serum content of RUNX2 were upregulated in stroke patients and mice. Knocking-down RUNX2 inhibited OGD/R-induced increases of proliferation and migration, while reversed the decrease of apoptosis in astrocytes. Moreover, RUNX2 knockdown also suppressed the inflammatory response in OGD/R-treated astrocytes and promoted the conversion of the reactive astrocyte phenotype from A1 to A2. The serum mRNA expression and level of RUNX2 were both notably increased in patients with cerebral edema. RUNX2 knockdown weakened cerebral edema and swelling of astrocytes. The results of HE staining and Nissl staining suggested that RUNX2 knockdown notably improved neuronal damage in the brain tissues of MCAO mice and also improved the injured performance of MCAO stroke mice in the behavioral test. In conclusion, RUNX2 expression was upregulated during the pathological progression of ischemic stroke. Furthermore, the knockdown of RUNX2 alleviated OGD/R-induced astrocytes activation and swelling, while inhibiting the polarization and inflammatory response in astrocytes. More importantly, RUNX2 interference also improved neuronal damage, cerebral edema, and neurobehavioral performances of MCAO mice.

RUNX2基因敲低可减轻缺血性脑卒中时A1星形胶质细胞过度激活、脑损伤和脑水肿。
尽管研究人员开始揭示runt相关转录因子2 (RUNX2)在一些神经系统疾病中的潜在意义,但RUNX2在缺血性卒中中的作用仍不清楚。收集脑卒中患者和对照组的血液样本和临床资料。建立大脑中动脉闭塞(MCAO)小鼠模型和星形胶质细胞氧糖剥夺/再灌注(OGD/R)模型,模拟脑卒中的体内外病理过程。功能丧失法评估RUNX2对星形胶质细胞功能的影响。采用HE染色和尼氏染色观察小鼠脑组织的组织病理学变化。采用TTC染色法测定小鼠脑梗死体积。采用Morri水迷宫试验、转弯试验和平衡木试验评价小鼠的神经行为表现。结果表明,RUNX2在脑卒中患者和小鼠中的表达和血清含量均上调。敲低RUNX2可抑制OGD/ r诱导的星形胶质细胞增殖和迁移的增加,逆转星形胶质细胞凋亡的减少。此外,RUNX2敲低还抑制了OGD/ r处理的星形胶质细胞的炎症反应,促进反应性星形胶质细胞表型从A1向A2转化。脑水肿患者血清RUNX2 mRNA表达及水平均显著升高。RUNX2敲低可减轻脑水肿和星形胶质细胞肿胀。HE染色和Nissl染色结果显示,RUNX2基因敲低可显著改善MCAO小鼠脑组织神经元损伤,并改善MCAO脑卒中小鼠在行为测试中的损伤表现。综上所述,RUNX2在缺血性脑卒中的病理进展过程中表达上调。此外,RUNX2基因敲低可减轻OGD/ r诱导的星形胶质细胞的激活和肿胀,同时抑制星形胶质细胞的极化和炎症反应。更重要的是,RUNX2干扰还改善了MCAO小鼠的神经元损伤、脑水肿和神经行为表现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
NeuroMolecular Medicine
NeuroMolecular Medicine 医学-神经科学
CiteScore
7.10
自引率
0.00%
发文量
33
审稿时长
>12 weeks
期刊介绍: NeuroMolecular Medicine publishes cutting-edge original research articles and critical reviews on the molecular and biochemical basis of neurological disorders. Studies range from genetic analyses of human populations to animal and cell culture models of neurological disorders. Emerging findings concerning the identification of genetic aberrancies and their pathogenic mechanisms at the molecular and cellular levels will be included. Also covered are experimental analyses of molecular cascades involved in the development and adult plasticity of the nervous system, in neurological dysfunction, and in neuronal degeneration and repair. NeuroMolecular Medicine encompasses basic research in the fields of molecular genetics, signal transduction, plasticity, and cell death. The information published in NEMM will provide a window into the future of molecular medicine for the nervous system.
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