川芎嗪对脊髓损伤大鼠铁死亡的调控作用及机制  

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

作　　者：陶经纬 周婧雅 赵毅 任敬佩 胡传宇 徐林[1] 穆晓红[1] 范筱 Tao Jingwei;Zhou Jingya;Zhao Yi;Ren Jingpei;Hu Chuanyu;Xu Lin;Mu Xiaohong;Fan Xiao(Dongzhimen Hospital,Beijing University of Chinese Medicine,Beijing 100700,China;Qingdao Municipal Hospital,Qingdao 266011,Shandong Province,China)

机构地区：[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

出　　处：《中国组织工程研究》2024年第26期4158-4163,共6页Chinese Journal of Tissue Engineering Research

基　　金：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。

摘　　要：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28d;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28d,qRT-PCR与Westernblot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。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 dismut

关 键 词：川芎嗪 脊髓损伤 铁死亡 神经保护作用 氧化应激 

分 类 号：R459.9[医药卫生—治疗学] R319[医药卫生—临床医学] R651.2