中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (20): 3202-3206.doi: 10.12307/2022.621

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

脑出血模型大鼠PirB和NogoA表达与神经功能缺损

杨  洋,刘梦兰,孟仁亮,陶  涛   

  1. 西南医科大学附属医院神经内科,四川省泸州市 646000
  • 收稿日期:2021-06-30 接受日期:2021-08-23 出版日期:2022-07-18 发布日期:2022-01-19
  • 通讯作者: 陶涛,博士,副主任医师,西南医科大学附属医院神经内科,四川省泸州市 646000
  • 作者简介:杨洋,女,1989年生,四川省简阳市人,汉族,2017年西南医科大学毕业,硕士,医师,主要从事脑血管疾病研究。
  • 基金资助:
    西南医科大学校级基金(2017ZRQN148),项目负责人:杨洋

Expression of PirB and NogoA and neurological deficits in rats with intracranial hemorrhage

Yang Yang, Liu Menglan, Meng Renliang, Tao Tao   

  1. Department of Neurology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Received:2021-06-30 Accepted:2021-08-23 Online:2022-07-18 Published:2022-01-19
  • Contact: Tao Tao, MD, Associate chief physician, Department of Neurology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • About author:Yang Yang, Master, Physician, Department of Neurology, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Supported by:
    Southwest Medical University School-level Fund, No. 2017ZRQN148 (to YY)

摘要:

文题释义:
PirB:是一种跨膜蛋白,与人类LILRB2同源,是主要组织相容性复合物Ⅰ的受体。PirB可表达于中枢神经系统,主要分布于大脑皮质和海马的神经元及星形胶质细胞,是Nogo-66、少突胶质细胞髓鞘糖蛋白和髓鞘相关糖蛋白3种髓鞘抑制因子的独立功能受体,对调节神经元导向、突触可塑性和稳定神经通路起重要作用,同时也可抑制轴突再生及神经突的生长。
NogoA:是最先被发现的轴突再生抑制因子,主要表达于中枢神经系统的少突胶质细胞,参与神经系统发育以及神经元和突触可塑性的调节,在正常成熟的中枢神经系统其表达下调,维持突触结构及神经环路的稳定性,限制生理性的突出重塑;在中枢神经损伤的情况下其表达水平增高,抑制神经突的生长和轴突再生。

背景:NogoA和PirB是髓鞘相关抑制因子及受体,在多种中枢神经系统损伤模型中表达明显增高,且起着抑制轴突再生和阻碍神经功能恢复的作用,脑出血遗留严重持久的神经功能障碍可能与二者有关。
目的:通过构建大鼠脑出血模型,探讨PirB和NogoA蛋白表达与神经功能缺损的关系。
方法:健康雄性SD大鼠75只,随机分为假手术组(n=25)和脑出血组(n=50),按取材时间点不同分为12 h及1,3,7,14 d组,假手术组大鼠不做任何处理,脑出血组大鼠以自体鼠尾不凝血经改良二次注入法建立脑出血模型。各时间点大鼠进行神经功能缺损评分后深度麻醉断头取脑,采用Western blot检测PirB和NogoA蛋白的定量表达,免疫荧光观察PirB定位表达。
结果与结论:①PirB可表达于成年健康大鼠的神经元及星形胶质细胞的胞体和突起;②脑出血组各时间点PirB和NogoA表达较假手术组明显增加,差异有显著性意义(P < 0.05),在脑出血后第3天达到高峰,持续至14 d表达仍较高;③脑出血组PirB和NogoA的表达与神经功能评分呈负相关关系;④结果表明,PirB和NogoA均可表达于健康成年大鼠脑组织中,脑出血后PirB和NogoA表达明显上调并抑制轴突再生,从而阻碍神经功能的恢复。

https://orcid.org/0000-0002-4997-3896 (杨洋) 

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 脑出血, PirB, NogoA, 轴突再生, 神经功能缺损, 大鼠

Abstract: BACKGROUND: Neurite outgrowth inhibitor A (NogoA) and paired immunoglobulin-like receptor B (PirB) are myelin-related inhibitors and receptors. They are significantly increased in a variety of central nervous system injury models, and play a role in inhibiting axon regeneration and impeding the recovery of nerve function. Persistent and severe neurological deficits due to intracerebral hemorrhage may be related to both NogoA and PirB.
OBJECTIVE: To investigate the protein expression of PirB and NogoA and their important effect on neurological deficits by constructing a rat model of intracranial hemorrhage.
METHODS: Seventy-five male Sprague-Dawley rats were randomly assigned into a sham surgery group (n=25) and an intracranial hemorrhage group (n=50). According to the time point of sample collection, each group was randomly divided into five subgroups as a 12-hour group, a 1-day group, a 3-day group, a 7-day group, and a 14-day group. Rats in the sham surgery group did not receive any treatment, while a rat intracranial hemorrhage model was established by modified secondary injection with autologous rat tail blood in the intracranial hemorrhage group. After the neurological deficit score was performed at each time point, rats were decapitated under deep anesthesia and brain samples were taken. Western blot was used to detect the quantitative protein expression of PirB and NogoA, and the location expression of PirB was observed by immunofluorescence.
RESULTS AND CONCLUSION: PirB could be expressed in neurons and astrocytes of health adult rats. The expression of PirB and NogoA in the intracranial hemorrhage group was significantly higher than that in the sham surgery group at each time point (P < 0.05). The expression peaked on the 3rd day after intracranial hemorrhage, and remained relatively high until the 14th day. The expression of PirB and NogoA in the intracranial hemorrhage group was negatively correlated with the neurological deficit scores. These results indicate that PirB and NogoA can be both expressed in the brain tissue of health adult rats, which is significantly up-regulated and inhibits axon regeneration after intracranial hemorrhage, thereby hindering the recovery of nerve function.

Key words: intracranial hemorrhage, paired immunoglobulin-like receptor B, neurite outgrowth inhibitor A, axon regeneration, neurological deficit, rat

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