中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (26): 4158-4163.doi: 10.12307/2024.432

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

川芎嗪对脊髓损伤大鼠铁死亡的调控作用及机制

陶经纬1,周婧雅1,赵  毅1,任敬佩1,胡传宇1,徐  林1,穆晓红1,范  筱1,2   

  1. 1北京中医药大学东直门医院,北京市  100700;2青岛市市立医院,山东省青岛市  266011
  • 收稿日期:2023-06-10 接受日期:2023-07-24 出版日期:2024-09-18 发布日期:2023-09-28
  • 通讯作者: 穆晓红,博士,主任医师,北京中医药大学东直门医院,北京市 100700 范筱,博士,主治医师,北京中医药大学东直门医院,北京市 100700;青岛市市立医院,山东省青岛市 266011
  • 作者简介:陶经纬,男,1994年生,北京市人,汉族,北京中医药大学在读博士,主要从事中西医结合治疗脊柱脊髓损伤及脑性瘫痪方面研究。
  • 基金资助:
    国家自然科学基金(82205149),项目负责人:范筱;中国博士后基金(2022M710472),项目负责人:范筱

Effect and mechanism of tetramethylpyrazine regulating ferroptosis in rats with spinal cord injury

Tao Jingwei1, Zhou Jingya1, Zhao Yi1, Ren Jingpei1, Hu Chuanyu1, Xu Lin1, Mu Xiaohong1, Fan Xiao1, 2   

  1. 1Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China; 2Qingdao Municipal Hospital, Qingdao 266011, Shandong Province, China
  • Received:2023-06-10 Accepted:2023-07-24 Online:2024-09-18 Published:2023-09-28
  • Contact: Mu Xiaohong, MD, Chief physician, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China Fan Xiao, MD, Attending physician, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China; Qingdao Municipal Hospital, Qingdao 266011, Shandong Province, China
  • About author:Tao Jingwei, MD candidate, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
  • Supported by:
    National Natural Science Foundation of China, No. 82205149 (to FX); China Postdoctoral Science Fund, No. 2022M710472 (to FX)

摘要:


文题释义:

川芎嗪:是中药川芎的有效成分,能够发挥抗氧化、抗炎等作用,被广泛应用于多种心脑血管疾病的治疗中。
铁死亡:是一种不同于凋亡、焦亡的细胞程序性死亡。铁死亡以铁代谢失衡及脂质过氧化反应为主要病理表现。


背景:研究表明脊髓损伤与铁死亡存在密切联系,而川芎嗪具有调控氧化还原反应的功能。

目的:探究川芎嗪对脊髓损伤大鼠铁死亡的调控作用及机制。
方法:将36只雌性SD大鼠随机分为假手术组、模型组及川芎嗪组,每组12只。模型组、川芎嗪组大鼠采用改良Allen’s法建立脊髓损伤模型,造模后分别腹腔注射生理盐水、川芎嗪注射液,1次/d,连续治疗28 d;假手术组不建模也不进行治疗。

结果与结论:①川芎嗪组治疗14,21,28 d的运动功能BBB评分低于假手术组(P < 0.05)、高于模型组(P < 0.05);②治疗28 d的苏木精-伊红染色显示,模型组大鼠脊髓组织可见空洞形成,局部见坏死组织及炎性浸润,并伴有纤维组织形成;川芎嗪组大鼠脊髓组织缺损面积较小,炎性浸润及纤维组织形成少于模型组;③治疗28 d的普鲁士蓝染色显示,模型组大鼠脊髓组织内可见大量铁沉积,川芎嗪组大鼠脊髓组织内铁沉积少于模型组;④治疗28 d,与假手术组比较,模型组大鼠脊髓组织内谷胱甘肽(GSH)、超氧化物歧化酶水平降低(P < 0.05),丙二醛水平升高(P < 0.05);与模型组比较,川芎嗪组大鼠脊髓组织内谷胱甘肽、超氧化物歧化酶水平升高(P < 0.05),丙二醛水平降低(P < 0.05);⑤治疗28 d,qRT-PCR与Western blot检测显示,与假手术组比较,模型组大鼠脊髓组织内谷胱甘肽过氧化物酶4、铁蛋白重链、铁输出蛋白的mRNA与蛋白表达水平均降低(P < 0.05);与模型组比较,川芎嗪组大鼠脊髓组织内谷胱甘肽过氧化物酶4、铁蛋白重链、铁输出蛋白的mRNA与蛋白表达水平均升高(P < 0.05);⑥治疗28 d的免疫荧光染色显示,假手术组大鼠脊髓组织神经元特异性核蛋白表达最多,模型组大鼠脊髓组织神经元特异性核蛋白表达最少;⑦结果表明,川芎嗪可通过调控铁死亡改善脊髓损伤大鼠的运动功能并起到神经保护作用。

https://orcid.org/0000-0003-1114-2437(陶经纬)

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: 川芎嗪, 脊髓损伤, 铁死亡, 神经保护作用, 氧化应激

Abstract: BACKGROUND: Studies have shown that there is a close association between spinal cord injury and ferroptosis, and that tetramethylpyrazine has the function of regulating redox reactions. 
OBJECTIVE: To investigate the regulatory effect of tetramethylpyrazine on ferroptosis in rats with spinal cord injury and its mechanism.
METHODS: Thirty-six female specific pathogen-free Sprague-Dawley rats were randomly divided into sham-operated group, model group and tetramethylpyrazine group, with 12 rats in each group. Animal models of spinal cord injury were established using the modified Allen’s method in the latter two groups. No treatment was given in the sham-operated group, while rats in the model and tetramethylpyrazine groups were given intraperitoneal injection of normal saline and tetramethylpyrazine solution, once a day, for 28 days.
RESULTS AND CONCLUSION: The Basso, Beattie & Bresnahan Locomotor Rating Scale score in the tetramethylpyrazine group was lower than that in the sham-operated group but higher than that in the model group after 14, 21, and 28 days of treatment (P < 0.05). After 28 days of treatment, hematoxylin-eosin staining showed that in the model group, the spinal cord tissue of rats showed cavity formation, necrotic tissue and inflammatory infiltration with fibrous tissue formation; in the tetramethylpyrazine group, the area of spinal cord tissue defects was smaller, and inflammatory infiltration and fibrous tissue formation were less than those in the model group. After 28 days of treatment, Prussian blue staining showed that a large amount of iron deposition was seen in the spinal cord tissue of rats in the model group, and less iron deposition was seen in the spinal cord tissue of rats in the tetramethylpyrazine group than in the model group. After 28 days of treatment, the levels of glutathione and superoxide dismutase in the rat spinal cord tissue were decreased (P < 0.05) and the level of malondialdehyde was increased in the model group compared with the sham-operated group (P < 0.05); the levels of glutathione and superoxide dismutase in the rat spinal cord tissue were increased (P < 0.05) and the level of malondialdehyde was decreased in the tetramethylpyrazine group compared with the model group (P < 0.05). After 28 days of treatment, qRT-PCR and western blot assay showed that the mRNA and protein levels of glutathione peroxidase 4, ferritin heavy chain, and ferroportin in the rat spinal cord tissue in the model group were decreased compared with those in the sham-operated group (P < 0.05), while the mRNA and protein levels of glutathione peroxidase 4, ferritin heavy chain, and ferroportin in the rat spinal cord tissue in the tetramethylpyrazine group were increased compared with those in the model group (P < 0.05). Immunofluorescence staining showed that after 28 days of treatment, the neuronal nuclei positive staining in the spinal cord of rats was the most in the sham-operated group and the least in the model group. To conclude, tetramethylpyrazine can improve motor function and play a neuroprotective role in rats with spinal cord injury by regulating ferroptosis.

Key words: tetramethylpyrazine, spinal cord injury, ferroptosis, neuroprotective effect, oxidative stress

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