中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (11): 1701-1707.doi: 10.12307/2023.122

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

川芎嗪改善脊髓损伤模型大鼠炎性微环境的机制

张厚君1,蒋昇源1,邓博文1,刘  港1,白惠中1,陶经纬1,范  筱2,赵  毅1,任敬佩1,徐  林1,穆晓红1   

  1. 1北京中医药大学东直门医院,北京市  100700;2青岛市立医院,山东省青岛市  266000
  • 收稿日期:2022-03-02 接受日期:2022-05-11 出版日期:2023-04-18 发布日期:2022-09-27
  • 通讯作者: 穆晓红,博士,教授,主任医师,博士生导师,北京中医药大学东直门医院,北京市 100700 徐林,博士,教授,主任医师,北京中医药大学东直门医院,北京市 100700
  • 作者简介:张厚君,男,1989年生,山东省沂南县人,汉族,北京中医药大学在读博士,主要从事脊柱脊髓、脑性瘫痪等研究。 蒋昇源,男,1993年生,山东省龙口市人,汉族,北京中医药大学在读博士,主要从事脊柱脊髓、脑性瘫痪等研究。
  • 基金资助:
    国家自然科学基金面上项目(81874467),项目负责人:穆晓红

Mechanism by which tetramethylpyrazine improves inflammatory microenvironment after spinal cord injury in rats

Zhang Houjun1, Jiang Shengyuan1, Deng Bowen1, Liu Gang1, Bai Huizhong1, Tao Jingwei1, Fan Xiao2, Zhao Yi1, Ren Jingpei1, Xu Lin1, Mu Xiaohong1   

  1. 1Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China; 2Qingdao Municipal Hospital, Qingdao 266000, Shandong Province, China
  • Received:2022-03-02 Accepted:2022-05-11 Online:2023-04-18 Published:2022-09-27
  • Contact: Mu Xiaohong, MD, Professor, Chief physician, Doctoral supervisor, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China Xu Lin, MD, Professor, Chief physician, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
  • About author:Zhang Houjun, MD candidate, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China Jiang Shengyuan, MD candidate, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China Zhang Houjun and Jiang Shengyuan contributed equally to this work.
  • Supported by:
    the National Natural Science Foundation of China (General Program), No. 81874467 (to MXH)

摘要:

文题释义:
川芎嗪:是从中药川芎的根茎中分离提纯的单体生物碱,主要用于治疗心脑血管缺血性疾病,现已被证实具有改善脊髓损伤后微循环障碍、调控神经元凋亡等作用。
脊髓损伤后炎性反应:脊髓损伤后免疫炎性反应被异常激活并持续存在,炎性细胞的浸润、促炎因子的释放均会导致炎性微环境失衡,加剧脊髓继发性损伤。

背景:脊髓损伤后炎性微环境的失衡会加剧脊髓继发性损伤,阻碍神经功能的修复,川芎嗪具有抑制炎症反应、保护神经细胞等作用,但其在脊髓损伤领域研究较少。
目的:观察川芎嗪能否通过改善大鼠脊髓损伤后炎性反应促进神经功能恢复,并探索其潜在机制。
方法:将36只SD大鼠随机分为假手术组、模型组、川芎嗪组,每组12只。假手术组行T10椎板切除术,后两组采用自制双刃显微剪行T10脊髓完全横断,川芎嗪组模型制备后给予盐酸川芎嗪注射液200 mg/(kg·d)腹腔注射,连续5 d。分别于术后1,3,7,14 d通过Basso-Beattie-Bresnahan(BBB)评分以及改良Rivlin斜板实验评估运动功能恢复情况;于术后14 d取材行苏木精-伊红染色、Nissl染色观察脊髓组织形态学改变;术后7,
14 d,ELISA法检测C-反应蛋白表达变化,免疫组织化学染色法分析炎性因子(核因子κB、肿瘤坏死因子α、白细胞介素10)表达情况。
结果与结论:①脊髓损伤后各时间点,假手术组大鼠BBB评分、改良Rivlin斜板角度均高于其他两组,差异均有显著性意义(P < 0.05);模型组与川芎嗪组大鼠BBB评分、改良Rivlin斜板角度相比差异均无显著性意义(P > 0.05);②苏木精-伊红染色结果显示,川芎嗪组炎性细胞的数量较模型组显著减少;③Nissl染色结果表明,川芎嗪组断端两侧脊髓组织内神经元数量明显多于模型组;④模型组脊髓损伤后C-反应蛋白表达出现先升高再降低的趋势,川芎嗪能显著降低C-反应蛋白的表达量(P < 0.05);⑤造模后7天,模型组核因子κB、肿瘤坏死因子α阳性表达均多于假手术组(P < 0.05),白细胞介素10阳性表达较少;与模型组相比,川芎嗪组脊髓组织核因子κB表达量显著降低(P < 0.05),白细胞介素10表达量显著升高(P < 0.05);造模后14天,模型组核因子κB、肿瘤坏死因子α阳性表达均高于假手术组(P < 0.05),白细胞介素10阳性表达低于假手术组(P < 0.05);川芎嗪组的白细胞介素10表达量较模型组升高(P < 0.05);⑥提示脊髓损伤后,促炎因子的表达量明显增加,炎性微环境失衡;川芎嗪能够调控脊髓损伤后免疫炎性反应,改善炎性微环境,促进脊髓损伤修复。

https://orcid.org/0000-0002-6317-6981(张厚君)

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: 脊髓损伤, 川芎嗪, 炎症, 炎性因子, 核因子κB, 肿瘤坏死因子α, 白细胞介素10

Abstract: BACKGROUND: The imbalance of inflammatory microenvironment after spinal cord injury can aggravate secondary spinal cord injury and hinder the repair of nerve function. Tetramethylpyrazine can inhibit inflammatory responses and protect nerve cells; however, its research in the field of spinal cord injury is less.
OBJECTIVE: To observe whether tetramethylpyrazine can improve inflammatory responses and recover nerve function after spinal cord injury in rats and to explore its potential mechanism.
METHODS: Thirty-six Sprague-Dawley rats were randomly divided into sham operation group, model group, and tetramethylpyrazine group, with 12 rats in each group. The sham operation group received T10 laminectomy; the model and tetramethylpyrazine groups received T10 spinal cord complete transection by self-made double-edge microshear. After modeling, the tetramethylpyrazine group was given tetramethylpyrazine hydrochloride injection via intraperitoneal injection (200 mg/kg/d) for consecutive 5 days. Basso, Beattie and Bresnahan score and modified Rivlin oblique plate test were used to evaluate the recovery of motor function at 1, 3, 7, and 14 days after surgery. Tissue samples were stained with hematoxylin-eosin and Nissl staining to observe the morphological changes at 14 days after surgery. Changes in C-reactive protein were detected by enzyme-linked immunosorbent assay. The expression of inflammatory factors, including nuclear factor-кB, tumor necrosis factor-α, interleukin-10, was analyzed by immunohistochemical staining.
RESULTS AND CONCLUSION: At each time point after spinal cord injury, Basso, Beattie and Bresnahan score and modified Rivlin slant angle in the sham operation group were significantly higher than those in the other groups (P < 0.05), while there were no significant differences between the model and tetramethylpyrazine groups (P > 0.05). Hematoxylin-eosin staining results showed that the number of inflammatory cells in the tetramethylpyrazine group was significantly lower than that in the model group. Nissl staining results revealed that the number of neurons at both broken ends of the spinal cord was significantly higher in the tetramethylpyrazine group than the model group. After spinal cord injury, C-reactive protein expression increased firstly and then decreased, and tetramethylpyrazine could significantly reduce the expression of C-reactive protein (P < 0.05). At 7 days after modeling, the expression of nuclear factor-кB and tumor necrosis factor-α in the model group was significantly higher than that in the sham operation group (P < 0.05), while the expression of interleukin-10 was lower than that in the sham operation group. Compared with the model group, tetramethylpyrazine could significantly decrease the expression of nuclear factor-кB and increase the expression of interleukin-10 (P < 0.05). At 14 days after modeling, the expression levels of nuclear factor-кB and tumor necrosis factor-α increased significantly in the model group compared with the sham operation group, while the expression level of interleukin-10 was significantly lower than the sham operation group (P < 0.05). Compared with the model group, tetramethylpyrazine could significantly increase the expression of interleukin-10 (P < 0.05). All these findings suggest that after spinal cord injury, the expression of pro-inflammatory factors is significantly increased and the inflammatory microenvironment becomes unbalanced. Tetramethylpyrazine can regulate the immune inflammatory response after spinal cord injury, improve the inflammatory microenvironment, and promote the repair of spinal cord injury. 

Key words: spinal cord injury, tetramethylpyrazine, inflammation, inflammatory factor, nuclear factor-кB, tumor necrosis factor-α, interleukin-10

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